VW POLO

VW Polo, VW Golf, VW Jetta, VW Passat, Audi, SKODA, SEAT and other new generation VAG cars are designed with a monopoly in mind. Restated they were designed so that only service agents are supposed to do the servicing and repairs. As of 2008 all new vehicle manufacturers ascribe to the CAN-Bus protocol which is not backward compatible to older ODB II protocols. The notorious VW EPC light, Drive by Wire and Limp mode and won't rev more than 2000 rpm explained here on Volkswagen Polo Highline.

Sunday, April 3, 2016

ELECTRO-HYDRAULIC POWER STEERING FAILURE

ELECTRO-HYDRAULIC POWER STEERING FAILURE

In a matter of just a few short days, I've received a flurry of assistance requests from several VW owners, all of whom seem to have power steering issues of some sort or the other. These issues ranging from complete failure of power steering to intermittent steering assist, to stiff and hard to steer. Among the vehicles affected are VW Jettas, Volkswagen transporters, Volkswagen Passats, VW MKIV TDI's and Golf Mk5s. Unfortunately specifics about steering problem can vary tremendously because some VAG vehicles are Hydraulically controlled, whereas some are electronic and others are ally controlled, all of which use slightly different technologies and components often spacely dissimilar.

This implies some vehicles will have a Power steering pump as part of the steering rack assembly whereas others will have a power steering motor / hydraulic fluid reservoir a good meter separated from the steering rack. The following is a general overview of the operation of VAG power steering systems. But what all these systems have in common, is the dreaded yellow steering light on the instrument panel which lights up for a 3- 4 seconds when the ignition is switched on but goes out after the engine is started. This is part of the self test that checks all electronic modules and mechanical mechanisms are synchronised to work together in harmony. However when the Servotronic warning lamp K92 stays on after the engine is started, there is definitely a fault with the power steering system.

When this happens it is a good idea to book the car in for repairs or do the repairs yourself because it could be quite expensive. Either way get the vehicle off the public road because loss of steering while driving can be very dangerous if not fatal especially going around corners because of the possibility of over steer. An electro-hydraulic power steering system is fairly intricate because its control modules are interconnected. The Power steering control module controls the hydraulic pump motor which produces the hydraulic pressure needed for the steering servo assistance. But in order to this, it needs signals from the 'Powers steering sensor' which is located in the steering column and from the speedometer sensor via the 'Instrument cluster control Module' which is responsible for turning on the yellow steering wheel symbol should there be a problem. And lastly the Power steering controller also needs the engine speed data from the 'Motronic control Unit'. It also needs a 12V supply from terminal 30 as well as 12 volts supply from terminal 15 and of course an earth connection. The power wires are fairly thick and chunky which implies high current delivery. Poor electrical connection can cause arching which will disrupt functionality. Loss of any of signals or voltages to the Power Steering control module for even a few seconds will interrupt steering assist and make the car hard to steer.

In a previous blog I described the steering loss I encountered due to loss of voltage to my car's hydraulic pump motor because my positive battery terminal was loose which resulted in intermittent supply to the main steering control module. It is worthwhile to to check the level of the Hydraulic fluid in the reservoir when you suffer hard of stiff steering. If there is a leak, the hydraulic pump motor cannot produce the necessary pressure resulting in stiff steering. If the fluid is low, refill the reservoir but don't start the engine but get someone to continually turn the steering wheel between the left and right extremes while waiting for all air bubbles to surface. When the appearance of air bubbles ceases, it would be ok to start the engine. It is also worth your while to check for DTC's with a scan tool. Should there be a steering error, deleting often restores steering assist. The LenkhilfeTRW V270 used in the Polo 9N is normally coded as 10110 which can be changed to 10120, 10130 or 10140 in order to incrementally increase the stiffness of the steering. For more Steering codings click here.

Friday, March 4, 2016

AUTEL D900 SCAN TOOL

The modern day car in its current incarnation has increasingly become more and more electrotechnical than mechanical and technological advancements are constantly on the incline. It is therefore quite appropriate to say that vehicle owners need to become electromechanical savvy. In my opinion, the way forward is to invest in a scan tool for your particular make and model car. Since most people are familiar with Cell Phones, Decoders, Set Top Boxes, PVR, DVR and Televisions with various menus, or computers, access points and routers with various wizards, navigating a scan tool would be relatively easy. A scan tool is an indispensable device for modern car diagnostics and is a technological marvel that's going to save you time and money, but only if you are willing to embrace the technology.

In a previous blog I discussed VCDS which I think is a really fantastic piece of software with its hardware interface combination specific to VAG vehicles. The amount of Onboard information that is accessible with VCDS is astounding and it is literally beter than the factory VAS Scan Tool used by VW /AUDI /SKODA / SEAT agents. In fact, in some cases VCDS will even retrieve more faults than the VAS tools. Be that as it may, as fantastic as VCDS is, it has major shortcomings for vehicle owners in general. Since VCDS is VAG specific, all other vehicle owners are at a loss to its technical capabilities and would have to look at other scan tools from companies like Auto Boss, Launch X431, Autel Maxidas DS708, Pro-Link iQ, Mentor Touch ET6500, OTC Pegisys, Craftsman - 20899, G-Scan Oceania, Bosch 3824, etc, who produce commercial multivehicle scan tools. These companies cater for the automotive service industry since their scan tools are quite pricey and far beyond the budget of the average car owner. If VCDS was multivehicle, it would be as good if not better than most commercial scan tools. However, since this is not the case, Autel has come to their aid of the average car owner. Autel has a low cost handheld scan tool that is multivehicle compatible that supports the following list of vehicles.

Acura, Audi, BMW, Buick, Cadillac, Chevrolet, Chrysler, Daewoo, Dodge, Eagle, Ford, Geo, GMC, Honda, Hummer, Hyundai, Infiniti, Isuzu, Jaguar, Jeep, Kia, Land Rover, Lexus, Lincoln, Mazda, Mercedes Benz, Mercury, Mitsubishi, Nissan, Oldsmobile, Pontiac, Porsche, Plymouth, Saab, Saturn, Scion, Suzuki, Toyota, Volkswagen, Volvo.

I acquired the 2015 version because of its versatility because it supports several models of each of the above mentioned vehicles. I wanted it to diagnose my Renault but discovered that it unfortunately does't support Renault and even more surprisingly it doesn't support my VW Polo 2.0L Highline (9N) either but it does support the the following list of VAG vehicles.

Audi A3
Audi A4
Audi A6
Audi A8
Audi A8L
Audi All road
Audi Cabriolet
Audi S4
Audi S6
Audi S8
Audi TT

Volkswagen Beetle
Volkswagen Bora
Volkswagen Eurovan L5
Volkswagen Eurovan VR6
Volkswagen Golf A3
Volkswagen Golf A4
Volkswagen GTI
Volkswagen Jetta A3
Volkswagen Jetta A4
Volkswagen Passat
Volkswagen Touareg

I don't know if the previous years version (Autel D900 2012) supports older vehicles like 2002-2010, but am of the opinion that all newer scan tools are backward compatible though I may be wrong. Anyway, the Autel scan tool is really cool, it comes with a mini CD containing a pdf file of all supported vehicles. I would have thought they would include a list of generic DTCs for Chassis / Powertrain (P-codes), Body (B-codes) and Network (U-codes) for easy of identification. What this implies is that you will have to either find these lists online, save them as pdfs or print them or access the internet resources to identify the codes every time you car throws you a DTC.

CONTINUED

Sunday, January 24, 2016

IMMOBILIZER

VW, AUDI, SKODA & SEAT IMMOBILIZER PROBLEMS

The worst thing that can ever happen to you especially when you're in a hurry to get to an appointment on time, is to turn-on your car's ignition key and see a yellow immobilizer symbol (car with a key below it) flashing in your instrument cluster accompanied by a fairly loud ear piecing audible signal. When you witness this, your car isn't going to go anywhere and neither are you. I suppose there are worst scenarios you could be in like when you stop along a dark and lonely road at night, compelled to take a pee, only to return to your car, to be met by the yellow flashing immobilizer symbol. There are so many VAG Vehicle owners who have experienced some sort of immobilizer problem with their cars and those drivers who haven't, I'm so sorry to say, but its only a matter of time before you do. That sounds very pessimistic, but once again, I'm sorry to say but that's the reality of the situation. It is what it is.

The dreaded Immobilizer symbol

Looking through my database of immobilizer issues, some of which I have shared with you below, gives you a fair idea of what can be expected from your VAG vehicle in the future. VW, Seat, Skoda and Audi vehicles comes out with a various versions of theft deterrent software systems, starting with vehicles without an Immobilizer (Pre 1995), to Immobilizer I (Immo I - 1996), to Immobilizer II (Immo II - 2002+), to Immobilizer III (Immo III) aka Transponder III, to Immobilizer IV (Immo IV) and the 5th generation Immobilizer (Immo V - 2011). There are also various Immobilizer hardware integrated into the instrument cluster, two of which are (J285 & J334 Immobilizer Control Module) and (J285 & J362 Immobilizer Control Module). Not to state the obvious, VAG cars are equipped with Anti-Theft Engine Disable immobilizers to circumvent theft; and should a car thief swap-out an ECU without matching it to instrument cluster, the engine will start briefly then die and this will be repeated indefinitely.

AUDI, SEAT, SKODA and VW AVITARS

Since the implementation of Immo 3, variable code evaluation is use in both the engine control unit and Immobilizer control unit. They use an equation / algorithm that calculates the generated variable code that both control units must agree upon. So, if you ever start your car and it stalls after about 1 second, then its perfectly safe to suspect the Immobilizer as faulty whether it displays the immobilizer symbol or not. In such a case the DTC memory should be checked and, if necessary, the control module adapted. Whether or not the has Immobilizer disabled the ECU can be verified under address word 17, and or address word 25, using a scan tool like VCDS, ODIS, Launch, Autoboss, Autel MaxiDAS, etc. The data whether ON or OFF, sits in measuring block 007 under Central locking. Most importantly the DTC are the clues that's going to point you in the right direction.

ODIS is the latest VW, AUDI SEAT SKODA, BENTLEY,
LAMBORGINI and PORSCHE Diagnostic Software.

So, when the ignition is switched ON, the Instrument cluster / Immobilizer Control Module enables or disables specific vehicle functions based on a hand shake. What this means is that when the switchblade key is pushed into the ignition lock, or placed in proximity of the coil transmitted radio signal, the instrument cluster electronics detects the key and initiates a data transfer between the pickup coil in the steering column or ignition switch and the RFID (Radio Frequency Identification) capsule embedded in the fob key. If the correct / unique identification number / authorized security data stream is received at the Immobilizer Control Module it permits the engine to start and idle uninhibited. But if it doesn't the car wont start.

RFID capsules are tiny, it stores data unique to your car and can be found inside your fob key.

The list below constitutes just a smatter of immobilizer errors that VAG car owners can experience, which range from a low fob key battery, to an instrument cluster or ECU replacement. And somewhere in between you will have, wiring harness issues ranging from intermittent to open circuit and even short circuit. Active RFID tags have their own power source whereas passive RFID tags used in all fob keys don't require power.
Essentially they consist of a scanning antenna, a transceiver with a decoder to interpret the data and a transponder - the RFID tag - that has been pre-programmed with the relevant information specific to your VIN, ECU and Instrument cluster. A dry joint on the pickup coil inside the capsule can prevent the necessary hand shake thus its a good idea to have a second matched fob key available if the key that won't start the car is suspect. In the list below, you also find appropriate codings for Immobilizer Module address 25 and as can be clearly seen, different control modules have different ODX/ASAM datasets, different software versions and different .rod files. Before changing any codes, make certain that you have a printed copy of all existing codes.

Immobilizer DTCs, Immobilizer Errors, Immobilizer Problems & Codes

Address 25: Immobilizer
Cannot be reached
--------------------------------------------------
Address 25: Immobilizer
unobtainable
--------------------------------------------------
Address 25: Immobilizer
DTCs not supported by controller
or a communication error ocurred
--------------------------------------------------
Address 25: Immobilizer
16897 - Incorrect Immobilizer code
P0513 - 35-00 - Malfunction in Circuit
17978 - Motronic Engine Control Module (ECM) -J220- Electronically locked
P1570 - 35-00 - Malfunction in Circuit
--------------------------------------------------
Address 25: Immobilizer
Part No: 6X0 953 257
Component: IMMO 0008
Coding: 00001
Excessive Comm Errors
--------------------------------------------------
Address 25: Immobilizer
Control unit: 6Y0 920 883 M
Component: IMMOBILIZER VDO V04
Coding: 00102
--------------------------------------------------
Address 25: Immobilizer
Part No: 6Q0 920 825 E
Component: IMMOBILIZER VDO V06
Coding: 03144
01176 - Key
07-00 - Signal too Low
--------------------------------------------------
Address 25: Immobilizer
Part No SW: 1K0 920 874 JX HW: 1K0 920 874 JX
Component: IMMO 3HL 2416
Revision: V0005000 Serial number: VWX7Z0G524F0LU
01176 - Key
008 - Implausible Signal - Intermittent
--------------------------------------------------
Address 25: Immobilizer
Controller: 6H0 953 257 B
Component: IMMO VWZ3Z0X1234088 V71
Coding: 09600
01176 - Key
65-10 - Unauthorized - Intermittent
--------------------------------------------------
Address 25: Immobilizer
Controller: 038 906 019 DQ
Component: 1,9l R4 EDC 0000SG 1536
Coding: 00002
17978 - Engine Start Blocked by Immobilizer
P1570 - 35-00 - Malfunction in Circuit
16989 - Internal Control Module: ROM Error
P0605 - 35-00 - Implausible Signal
--------------------------------------------------
Address 25: Immobilizer
Controller: 4A0 953 234 F
Component: IMMO AUZ9Z0T7884365 D77
Coding: 00000
01176 - Key
07-10 - Signal to Low - Intermittent
00750 - Warning Lamp
31-10 - Open or Short to Ground - Intermittent
--------------------------------------------------
Address 25: Immobilizer
Part No: 6L0 920 803 E
Component: IMMOBILIZER AGD V05
Coding: 00105
01177 - Engine Control Unit
65-10 - Unauthorized - Intermittent
--------------------------------------------------
Address 25: Immobilizer
Part No: 6X0 953 257
Component: IMMO 0003
Coding: 00003
00750 - Warning Lamp
31-00 - Open or Short to Ground
01314 - Engine Control Module
49-10 - No Communications - Intermittent
01176 - Key
65-10 - Unauthorized - Intermittent
--------------------------------------------------
Address 25: Immobilizer
Part No: 4A0 953 234
Component: IMMO AUZ9Z0W5254731 D77
Coding: 00000
01176 - Key
07-10 - Signal too Low - Intermittent
--------------------------------------------------
Address 25: Immobilizer
Part No SW: 1T0 920 873 E HW: 1T0 920 873 E
Component: IMMO VDD 3808
Revision: V0001000 Serial number: VWX7Z0G33ND1A0
00003 - Control Module
014 - Defective
--------------------------------------------------
Address 25: Immobilizer
Part No: 1H0 953 257 B
Component: IMMO VWZ3Z0M2519376 V00
Coding: 09600
00546 - Data wiring faulty
27-00 - Implausible Signal
--------------------------------------------------
Address 25: Immobilizer (J334)
Part No SW: 5K0 953 234 HW: 5K0 953 234
Component: IMMO H03 0607
Serial number: 00000000000000
Coding: 000000
ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03009
ROD: EV_Immo_UDS_VDD_RM09_SE36.rod
9456681 - Key
B104C 29 [009] - Implausible Signal
Confirmed - Tested Since Memory Clear
--------------------------------------------------
Address 25: Immobilizer
Part No: 1H0 953 257 B
Component: IMMO VWZ3Z0E1731908 V00
Coding: 09600
00546 - Data wiring faulty
27-00 - Implausible Signal
01181 - Initializing; Only 2 Keys Learned
35-00 - Implausible Signal
01179 - Incorrect Key Programming
35-00 - Implausible Signal
--------------------------------------------------
Address 25: Immobilizer
Part No: 1K0 920 960 L
Component: IMMO 3354
02241 - Engine Control Module; Immobilizer Data not Adapted
000 - - - Intermittent
--------------------------------------------------
Address 25: Immobilizer
Part No SW: 3C0 959 433 H HW: 3C0 959 433 H
Component: IMMO 038 0364
Revision: 00038000 Serial number: VWZCZ000000000
Part No: 3C0 905 861 C
Component: ELV 023 0350
3C0905861C ELV 023 0350
02823 - Requirements for Locking the Steering Column Lock not met
000 - - - Intermittent
02861 - Electronic Steering Column Lock Check Sum Error
008 - Implausible Signal - Intermittent
02815 - Steering Column Lock; Supply Voltage for Locking Motor
002 - Lower Limit Exceeded - Intermittent
02817 - Steering Column Lock; Enabling Wire from Steering Wheel Electronics
002 - Lower Limit Exceeded - Intermitten
02818 - Steering Column Lock; Enabling for Electronic Ignition Lock
009 - Open or Short to Ground
02811 - Control Module for Electronic Steering Column Lock (J764)
014 - Defective - Intermittent
--------------------------------------------------
Address 25: Immobilizer
Part No: 2K0 920 941 CX
Component: IMMO VDD 0716
--------------------------------------------------
Address 25: Immobilizer
Part No: 1P0 920 825 B
Component: IMMO VO3 0424
--------------------------------------------------
Address 25: Immobilizer
Part No: 6Q0 920 923 Q
Component: IMMOBILIZER VDO V03
Coding: 01444
--------------------------------------------------
Address 25: Immobilizer
Part No: 6Q0 920 923 R
Component: IMMOBILIZER VDO V02
Coding: 01432
--------------------------------------------------
Address 25: Immobilizer
Part No: 6Q0 920 903 J
Component: IMMOBILIZER VDO V06
Coding: 01431
--------------------------------------------------
Address 25: Immobilizer
Controller: 6Q0 920 825 E
Component: IMMOBILIZER VDO V03
Coding: 01144
--------------------------------------------------
Address 25: Immobilizer
Part No: 6Q0 920 825 F
Component: IMMOBILIZER AGD V05
Coding: 01132
--------------------------------------------------
Address 25: Immobilizer
Part No: 6Q0 920 804
Component: IMMOBILIZER VDO V06
Coding: 01131
--------------------------------------------------
Address 25: Immobilizer (J334)
Part No SW: 5K0 953 234 HW: 5K0 953 234
Component: IMMO H04 0406
Serial number: 00000000000000
Coding: 000000
ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03008
ROD: EV_Immo_UDS_VDD_RM09_SE25.rod
--------------------------------------------------
Address 25: Immobilizer (J334)
Part No SW: 6J0 920 901 A HW: 6J0 920 901 A
Component: IMMO X07 0110
Serial number:
ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03004
ROD: EV_Immo_UDS_VDD_RM09_SE25.rod
--------------------------------------------------
Address 25: Immobilizer (J334)
Part No SW: 6R0 920 861 B HW: 6R0 920 861 B
Component: IMMO H23 0110
Serial number:
ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03004
ROD: EV_Immo_UDS_VDD_RM09_VN35.rod
--------------------------------------------------
Address 25: Immobilizer (J334)
Part No SW: 5K0 953 234 HW: 5M0 920 960 E
Component: IMMO H14 0112
Revision: X0014004 Serial number:
Coding: 000000
ASAM Dataset: EV_ImmoUDSMM9RM10 A01102
ROD: EV_ImmoUDSMM9RM10.rod
--------------------------------------------------
Address 25: Immobilizer (J334)
Part No SW: 5K6 920 970 G HW: 5K6 920 970 G
Component: IMMO H05 0206
Serial number: 00000000000000
ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03004
ROD: EV_Immo_UDS_VDD_RM09_VW36.rod
--------------------------------------------------
Address 25: Immobilizer
Part No SW: 3C0 959 433 AR HW: 3C0 959 433 AR
Component: IMMO 043 0383
Revision: 00043000 Serial number: VWZCZ000000000
Part No: 3C0 905 861 H
Component: ELV 028 0380
3C0905861H ELV 028 0380
--------------------------------------------------
Address 25: Immobilizer
Part No SW: 1K6 920 974 H HW: 1K6 920 974 H
Component: IMMO VDD 2416
Revision: V0003000 Serial number: VWX7Z0H43NL82Z
--------------------------------------------------
Address 25: Immobilizer
Controller: 6X0 953 257
Component: IMMO 0007
Coding: 00001
--------------------------------------------------
Address 25: Immobilizer
Part No: 5P0 920 825 A
Component: IMMO VO3 0422
--------------------------------------------------
Address 25: Immobilizer
Part No SW: 1Z0 920 912 E HW: 1Z0 920 912 E
Component: IMMO VD1 1610
Revision: V1610056 Serial number: SKZ7Z0G4047329
--------------------------------------------------
Address 25: Immobilizer (J334)
Part No SW: 5K0 953 234 HW: 5K0 953 234
Component: IMMO H03 0505
Serial number:
Coding: 000000
ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03009
ROD: EV_Immo_UDS_VDD_RM09_VW25.rod
--------------------------------------------------
Address 25: Immobilizer
Part No SW: 8P0 920 931 HW: 8P0 920 931
Component: KOMBIINSTR. VDO H18 0560
Revision: D0H18002 Serial number: AUX7Z0F6FN5049
-------------------------------------------------
Address 25: Immobilizer
Controller: 6X0 953 257
Component: IMMO 0003
Coding: 00001
--------------------------------------------------
Address 25: Immobilizer
Controller: 6X0 953 257
Component: IMMO 0008
Coding: 00001
--------------------------------------------------
Address 25: Immobilizer (J334)
Part No SW: 5K0 953 234 HW: 5K0 953 234
Component: IMMO H07 0705
Serial number: 00000000000000
Coding: 000007
ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03709
ROD: EV_Immo_UDS_VDD_RM09_SE36.rod
--------------------------------------------------
Address 25: Immobilizer (J334)
Part No SW: 5K0 953 234 HW: 5K0 953 234
Component: IMMO H07 0308
Serial number:
Coding: 000000
ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03005
ROD: EV_Immo_UDS_VDD_RM09_SE35.rod
--------------------------------------------------
Address 25: Immobilizer (J334)
Part No SW: 5K0 953 234 HW: 5K0 953 234
Component: IMMO H03 0607
Serial number:
Coding: 000000
ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03009
ROD: EV_Immo_UDS_VDD_RM09_VW36.rod
--------------------------------------------------
Address 25: Immobilizer (J334)
Part No SW: 6J0 920 901 A HW: 6J0 920 901 A
Component: IMMO X07 0110
Serial number:
ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03004
ROD: EV_Immo_UDS_VDD_RM09_SE25.rod
--------------------------------------------------
Address 25: Immobilizer
Part No: 1P0 920 904 C
Component: IMMO VO3 0422
--------------------------------------------------
Address 25: Immobilizer
Controller: 6X0 953 257
Component: IMMO 0008
Coding: 00001
--------------------------------------------------
Address 25: Immobilizer
Part No: 6Q0 920 903 J
Component: IMMOBILIZER VDO V06
Coding: 01431
--------------------------------------------------
Address 25: Immobilizer
Part No: 6Q0 920 923 R
Component: IMMOBILIZER VDO V06
Coding: 01432
--------------------------------------------------
Address 25: Immobilizer
Part No SW: 1K0 920 953 P HW: 1K0 920 953 P
Component: IMMO 3HL 1610
Revision: V0003000 Serial number: VWZ7Z0G9079540
--------------------------------------------------
Address 25: Immobilizer
Part No SW: 3AA 959 433 HW: 3AA 959 433
Component: IMMO 043 0399
Revision: 00043000 Serial number: VWZCZ000000000
Subsystem 1 - Part No: 3C0 905 861 J
Component: ELV 029 0380
3C0905861J ELV 029 0380
--------------------------------------------------
Address 25: Immobilizer
Part No SW: 3C0 959 433 AQ HW: 3C0 959 433 AQ
Component: IMMO 044 0383
Revision: 00044000 Serial number: VWZCZ000000000
Part No: 3C0 905 861 G
Component: ELV 027 0380
3C0905861G ELV 027 0380
--------------------------------------------------
Address 25: Immobilizer
Part No SW: 8P0 920 981 A HW: 8P0 920 981 A
Component: KOMBIINSTR. VDO H73 0300
Revision: D04 Serial number: AUX7Z0E1FNG04N
--------------------------------------------------
Address 25: Immobilizer
Part No SW: 8P0 920 900 F HW: 8P0 920 900 F
Component: KOMBIINSTR. VDO H72 0210
Revision: D03 Serial number: AUX7Z0D9FND0BK
--------------------------------------------------
Address 25: Immobilizer
Part No SW: 8J0 920 980 G HW: 8J0 920 980 G
Component: KOMBIINSTR. VDO H02 0480
Revision: D0H02002 Serial number: AUX7Z0I4FNJ115
--------------------------------------------------
Address 25: Immobilizer
Part No SW: 1K0 920 974 N HW: 1K0 920 974 N
Component: IMMO 3HL 2418
Revision: V0003000 Serial number: VWX7Z0H824U00R

Monday, January 4, 2016

TRANSMISSION LIMP MODE

During the late 1970's to the early 1980s, the on-board computer made its first appearance, responsible for monitoring and controlling the vehicle's engine. It started out with better fuel economy in mind, followed by a electronic capacitive discharge ignition systems (CDI), then electronic points and engine timing were introduced. Soon thereafter it encompassed anti-lock braking (ABS), airbags (SRS), climate control (HVAC), electronic stability control (ESP) and emissions control among several others. Today, virtually every subsystem in your vehicle is controlled by a computer interfaced with sensors of sorts – including the automatic transmission’s shift timing sequence and line pressure. The manifold absolute pressure (MAP) sensor and throttle position sensor (TPS), among several other, supplies the engine’s load signals and information which is used by the Engine Control Unit (ECU) to inform the Transmission Control Unit (TCU) when to manage gear up-shift and down-shift, especially when you’re driving up an incline or inclined toward spirited driving. Since there is so much electronics, there is so much more that can go wrong, so a "fail safe" system had to be employed as a safety feature just in case of signal errors that occur outside of its expected range. A feature that would protect the engine / transmission from "runaway" that could cause it to self destruct.

There is even an Electronic Pressure Control (EPC) valve safety circuit, integrated directly in the transmission hydraulic circuit of all VAG vehicles. When necessary, a part of the gearbox is depressurised to prevent any transmission clutches from closing uncontrolled due to excessive clutch pressure. This is feature is called the "Emergency Program" aka "Limp Mode" or "Limp Mode Home".

When your Audi, Volkswagen, Seat or Skoda's EPC light, and or the Check engine light, and or DPF (Diesel Particulate filter) light turns on, your car is likely to go into limp mode, if it hasn't already entered into Limp mode. Other than the illuminated light or lights in the instrument panel, and an engine that will not rev more than 2000 revs, neither exceed 30 kph, it gives you absolutely no explanation why it happened. To make matters worse, there is no definitive list of what causes this elusive limp mode but I have tabulated some of them from personal experience.

How to fix limp home mode

Throttle Pedal Sensors (TPS), G79/G185
Throttle body Position sensors, G187/G188
Throttle Valve Control Module, J338
Engine Component Power Supply Relay, J757
Intermittent Ignition Coils, N, N128, N158, N163
Fuel Injectors N30, N31, N32, N33
Transmission Control Module J217
Waste-gate Actuator Valve, N75
Knock Sensor, G61
Fuel pressure sensor G247
Fuel pressure regulator valve, N276
Automatic transmission electronic pressure control (EPC ) solenoid / stuck solenoids
Transmission solenoid harness

Volkswagen Automatic Transmission Solenoid and Harness kit.

The only way to repair an EPC fault (Limp Mode) or for that matter any fault on any VAG vehicle, is to do a DLC scan to pull the Diagnostic Trouble Codes (DTC) to at least point you in the right direction. One of the most miserable Limp mode experiences ever is a Transmission Limp Mode. They range from a transmission that is low on fluid, to stuck in 2nd gear, to jumping out of gear, to noisy gears selection. But the worst is when engine antifreeze water from the radiator enters through the corroded ATF cooler lines into the transmission, also allowing the ATF to leak into the engine coolant, radiator and engine.

Knowing the Germans, their just had to be a oil cooler for the automatic gearbox integrated somewhere into the radiator. Even though VW claim that ATF is a lifetime fluid", it is only a matter of time before it mixes with antifreeze and water. Anyway, this happens to the all-in-one radiators of Volkswagen Jettas, VW Golf 4, Passat B6, Audi A4 Quattro and I suspect other VAG vehicle which I havn't personally experienced. It also happens to the Mercedes Benz C250, but it's not an exclusive German car design flaw. It s also prevalent in the Nissan Pathfinder, Fords and Pontiac as well as several Asian vehicles.

Once the oil cooler lines spring a leak inside the plastic radiator, it messes-up the entire system by mixing the anti freeze water mixture with ATF. Yet with all the vehicle on-board electronics there is no visible sign that this cross flow happened nor any electronic detection or indication. Since oil is less dense than water, the gears in the transmission runs in water which causes the metal gears to rust besides taking the facings off the clutch plates. Beside the water shorts out the printed circuit board driving the solenoids on the valve body. This type of extensive damage can result in a very expensive transmission replacement if it isn't detected before the damage is done.

Volkswagen valve body

An easy way to identify this problem, is to check the ATF dipstick level often, which needs to be between the two notches marking min and max. Much more than that can indicate ATF floating on water. Also verify that the colour of the ATF is translucent red and not brown or black. Bi-annual ATF replacement, though expensive should almost guarantee a trouble free transmission. The logic behind an all-in-one radiator ATF cooler is to heat-up the ATF with the hot radiator water during cold conditions because oil tends to become thick and gel when very cold. But is may be in your interest to replace your all-in-one ATF cooler with a separate / free standing oil cooler as used in the new cars if you live in a country where it never snows or never experience freezing cold weather.

Universal Aluminum after market Automotive 13-Roll Transmission Oil Cooler

Friday, January 1, 2016

NEW GENERATION ALL ELECTRIC PHAETON LUXURY SEDAN

New Generation All Electric Phaeton Luxury Sedan

Volkswagen has been delaying the inevitable for way too long by fooling around with emission cheating devices in its EA 189 TDI - 2.0L and 3.0L Diesel Engines, and completely missed the window of opportunity enjoyed by its competitors. To the point that the EPA has placed a halt on all VW diesel engines destined for use in 2016 vehicles. Meanwhile Toyota sales have topped VW sales for the month of November and outsold Volkswagen for 5th straight month. At this rate Toyota is likely to outsell VW for December and very likely for the entire year of 2015.

I'm certain this vexes Volkswagen greatly because Volkswagen has been blowing its own horn as the 'Group of the year for 2014' even though they are no longer considered among the top fifty companies in Germany. In an attempt to regain its status and as a measure to contain the fallout of the Diesel emissions debacle, the newspapers and magazines have been inundated with Volkswagen Service offers flaunting slogans like.

"Volkswagen Service is proud to introduce Volkswagen Economy Packages".

"Nobody knows Volkswagen better than we do and nobody's better equipped to service it."

"Let the people who built your car, service and repair your car".

"Volkswagen only uses Genuine Parts".

"You get service of the highest international standard - 100% Volkswagen service".

"Your Volkswagen is Serviced by Volkswagen Certified Technicians, highly trained and relentlessly dedicated".

The million dollar question is, "Is this enough to make a come back" or "Is it a matter of too little too late". The Diesel Gate Scandal that cost Volkswagen tens of billions of dollars only caused an enormous surge in EV interest. Today EV prices compare very favourably with petrol and diesel equivalents and electric cars are no longer the preserve of the rich minority. They are now available to anybody who wants a reliable, cheap-to-run car because the days of spending $75 per week to fill up your polluting car will soon be over.

Considering electric cars have no emissions, and their speed, performance and range have vastly improved. EV's carry no road tax levy and its running costs are as little as 4 cents per mile, a quarter of the average cost for petrol / diesel cars. The Toyota Prius is currently sold in more than 90 countries and its global cumulative sales have passed the 5.2 million units mark in July 2015. This figure represents 65.4% of the 8 million hybrids sold worldwide by Toyota Motor Company since 1997. Toyota's sales figures for the first three quarters of 2015 stands at 21,210,000,000.00 JPY = 162,256,500.00 EUR or 176,255,100.00 USD.

Volkswagen is on the back foot for not embracing EV's sooner and is scrambling to get their New Generation All Electric Phaeton Luxury Sedan to market by 2017, which is destined to rival both Tesla and Mercedes Benz. The next big question is, "Can VW pull this off sucessfully"?

Initially when Volkswagen's launched their first-generation Phaeton luxury sedan, their objective was to prove that they are the world's innovation and engineering leader, and not Mercedes-Benz or Rolls Royce. But the $70,000+ Phaeton was a flop in North America and was discontinued, yet it underpinned the hugely successful Bentley Continental and the Audi A8. From this one can easily see that the Phaeton was probably something very special hence it survived the chopping block, as all non essential / unnecessary projects were scrapped because of the ongoing diesel emissions scandal.

A rendered model of what the New Generation all electric Phaeton luxury sedan could look like.

Tesla Signature Series Model X with Tesla's Autopilot autonomous driving system.

VOLKSWAGEN GOES ELECTRIC

VOLKSWAGEN WAS DELAYING THE INEVITABLE

EV's (electric vehicles) has been around as long ago as the mid 1930's, but back then, they were called trolleybuses or trams. As can be seen in the two images below, these EV's served as mainstream transport for the masses and believe it or not, are still in use in many places in Europe today. The technology though very old, is of long standing and proven, which is essentially a high voltage electric motor that can deliver high horsepower at high RPM, connected via a gearbox to the drive train. Talking about trains, trains are in fact also EV's but with a slight difference. These EV's of days gone by, both trams and trains are attached to some sort of umbilical from which it received its electrical power to propel whereas modern EV's rely on portable battery power which until now hasn't been very efficient.

But according to Elton Musk, CEO of Tesla motor company, this isn't strictly true because they have an entire range of Tesla cars that can do as much as 265 miles (426 km) between battery recharges. He is also of the opinion that the maximum limit of what’s possible with diesel and gasoline has been reached and that the time has come to embrace a new generation of technology.

Trams in Alexandria Eqypt.

Trams in Vienna by Martin Otner

Frankly speaking, I don't think its about the battery's inefficiencies but rather about the lack of facilities to charge your EV's battery when enroute or at your destination. But in the same breath I need to add that the charging problem is easily surmountable because a solar panel driven charging system (green technology) can easily be sold as an accessory with every EV and can be installed in your home garage. An overnight charge would give the average vehicle user sufficient power to commute virtually all day.

Admittedly, getting high efficiency from a high-voltage motor powered by a lithium-ion battery pack is not easy because there are many factors that effect efficiency, non of which I believe would have been too difficult for Volkswagen to solve. It just kinda seems that Volkswagen was delaying the inevitable even tough they've been flaunting their all-electric, minicar, e-up concept for the past number of years. Yet whilst still grappling with the global fallout that originated from its diesel emissions scandal, VW recently reaffirmed the brand’s commitment to electrification. Sharing that they are working on a "standardized electric architecture" for all VW vehicles with motors and flat battery design components that can fit in the various VW vehicle body shapes and vehicle types.

Adding that VW is also creating a new business segment called “New Volkswagen” to bundle modern development of digital features for Internet connected vehicles and other related mobility services. This announcement was based on the fact the Silicon Valley firms like Apple Inc. and Alphabet Inc. are planning to make inroads into the automotive segment with software development and battery production.

Vw even released a photo of its brand new all-electric concept car with an expected driving range of 155–186 miles, scheduled to debut at the Consumer Electronics Show in Las Vegas in Jan of 2016. But the main surprise was the news that the next generation Phaeton super-luxury sedan will be an EV—only and not available in nether diesel or gasoline. Its going to have a pure electric drive with long-distance capability, connectivity, and next-generation assistance systems as well as an emotional design.

Saturday, December 26, 2015

EPC Q & A REVISTITED

Of late, Vag vehicle owners are experiencing Electronic Power Control problems more frequently than ever before yet most VW, Audi, Skoda and Seat still have no idea what an EPC fault is and what causes the EPC light to turn on. To add insult to injury some VW, Audi, Skoda and Seat service agents tend to "repair" these faults by trial and error, costing the vehicle owners exorbitant amounts of money only to later discover that the fault persists. The EPC warning light can be found in selected models in virtually all makes of cars and is not limited to just Volkswagen Audi, Skoda and Seat vehicles. Volkswagen Audi, Skoda and Seat use Electronic Power Control in their drive by wire vehicles as a safety feature which in my opinion isn't all that safe. Case in point, I have had my VW Polo go into limp mode whilst overtaking a car in a two way street. It stalled at the very moment when I was cutting-in in front of the said car, causing its driver to frantically brake and swerve to avoid colliding with the rear of my car because suddenly I wasn't accelerating any longer. Not to mention the on-coming car, which swerved toward the shoulder of the road since my car was straddling the white line. My EPC problem turned out to be the incorrect octane fuel.

Be that as it may, by the time the EPC light illuminates in the dashboard, in response to some sensor detecting a problem, the problem already occurred in either the torque control, traction control, throttle body and sensors, accelerator pedal sensors, cruise control, fuel supply or ignition systems. Essentially the epc light is just a way to tell you that there is a problem with the drive by wire system and generally remain on until the fault is cleared. At the instant that the EPC light illuminates, the ECU flags a DTC which is then stored in the relevant electronic control module. This DTC gives a fair idea of the suspect system but cannot pinpoint the culprit component.

QUESTION?

Anonymous says:- Hey I have a 06 Passat 2.0t and I am reading all of these stories on the EPC my check engine light was already on while I was driving but the car was good. I was on my way to work after stopping at the gas station and my EPC light came on and my car stalled on the highway and has not came back on. The lights windows and everything works but when I try to turn the car on it attempts to turn but never does.

ANSWER!

From your description I understand that after your EPC light came on, your car won't restart. So you checked the light and windows which tells me you suspected that the battery may have run down and perhaps not strong enough to turn the engine over. But you also mentioning 'check engine light'. A combination of check engine light and EPC light is emissions related and if your car's emissions exceed a predetermined level, the ECU will prevent the engine from starting. Its best that you have your car scanned to see what DTC it threw out.

QUESTION?

Musa Brain says:- Hi there. I have a VW polo vivo I have the EPC light on when I'm driving slowly and also when I'm reaching a stop sign and hit the clutch pedal it turns off and when I start it in the morning it turns off so I have to rev it for it to idle but after some few minutes the EPC light comes on. Please help?

ANSWER!

Musa your description of your EPC problem seems that you car doesn't idle fast enough. I assume that its drives normal whiles on a higher rev. It quite evident that it switches off when you come to a halt and whilst it's cold. I suspect that you have a blocked air filter problem that doesn't allow sufficient air to the MAF, but I could be wrong since you provide no DTC's. It could also be a blocked fuel filter that starves stichiometricity since torque is determined by both air and fuel.

QUESTION?

Bogdan Iova says:- When I swich key on the EPC light not apear and teh engine not start. Golf 1.6 16V

ANSWER!

Bogdan, you really haven't given me much to work with here, but off hand it seems that you may have a blown fuse that powers the instrument cluster. Because the moment you turn on the ignition key, the OBD II system does a self diagnosis by turning on all the dash board lights for about 10 seconds whilst running the test. It then turns off those light related to the circuits that function normally and leaves those lights on, for circuits that fail the test. So, if you EPC light does come on when you turn on the ignition , then goes off, you don't have an EPC problem. However if your engine won't start it's obviously cause by something else. It could be that your battery has reached end of life. If the engine doesn't turn over, even the starter could have packed-up. But if it does crank and won't start, check your fuel gauge to at least determine that you have fuel in the tank. Related to this could be your ECM Power Relay, your fuel pump relay or the fuel pump itself. Without more info, this is about all I can help you with. DTC codes would have been helpful.

QUESTION?

Anonymous says:- Hi there, I have a 2003 polo 1.6, EPC light is on and when it's idling can't rev it, checked and cleaned the throttle body and still same issue, ran a diagnostics check and it says something about the pedal, please help?

ANSWER!

Hi Anonymous, you seem to have a classic EPC problem but for the benefit of everyone else, it would have been great to share the DTC codes that you recovered. I suspect it must have been one of the following codes since you mention the error code said something about the accelerator pedal.

18038 P1630 Accel, Pedal Position -G79 signal too small (low)
18039 P1631 Accel, Pedal Position -G79 signal too largely (high)
18040 P1632 Accel, Pedal Position -G79 supply voltage malfunction

18041 P1633 Accel, Pedal Position -G185 signal too small
18042 P1634 Accel, Pedal Position -G185 signal too largely
18047 P1639 Accel, Pedal Position -G79 & -G185 out of range

You also mentioned that you checked and cleaned the throttle body. If you dismantled it in anyway, then you need to redo adaptation, else the ECU would have no idea how wide the butterfly valve has opened. Remember there is no throttle cable connecting the accelerator pedal to the throttle housing. This is known as a drive by wire system and it communicates the driver's torque demand to the ECU. The two potentiometers in the accelerator pedal assembly communicates the pedal position directly to the engine control module (ECM) using two separate signals, one signaling the pedal physical position and the other indicating rate of pedal movement. You will need a scan tool to do the adaptation because any faults in memory must be cleared before adaptation can be done.

The most common problem is the accelerator pedal itself. One or both of the potentiometers go high resistive/ intermittent and the accelerator pedal assembly should be replaced as a single unit. A tell tail sign of accelerator pedal trouble is that the engine revs higher than 800 rpm and at times the rev counter rises and falls continually whist idling, going as as high as 2000 rpm. If this happens, grab hold of the pedal whilst the car is idling and pull the pedal upwards, away from the floor. If the revs reduce and the surging stabilizers, replace the pedal. The image above shows idling whilst engine in surging and the image below shows idling with the pedal pulled up.