2003 VW T4 Chinese Engine Fault codes

Braindead · Mar 28, 2024

Hello,

2003 T4 VR AES

I have runned my first diagnostic and have cleared the error codes that were showing.

A few are still present, only for the engine.

The T4 was made in China by Chin Chun Motor and most of VCDS option are not working, like resetting the services intervals (most channels are absent).

I also could not find the ignition 093 but could see an ignition angle of 8,3° BTDC. Is it out of tolerance and the timing chain need replacement?

If you have any idea on how to fix these issues that would be great.

I have checked Ross Tech Code list and most of mine are absent.

Thank you.

Braindead man.

Here is the full diag log:

Code:

VIN: LACZZZ70Z3C000206   License Plate:

Mileage: 131910km-81965mi   Repair Order:


--------------------------------------------------------------------------------

--------------------------------------------------------------------------------


Chassis Type: 7D - VW Transporter/Multivan (1996 > 2004)

Scan: 01 02 03 08 15 17 18 19 22 25 35 37 56

 

   Mileage: 131910km-81965miles

-------------------------------------------------------------------------------

Address 01: Engine        Labels: 021-906-256.lbl

   Part No: 021 906 256 AC

   Component: MOTRONIC M3.8.1  AT V01

   Coding: 00001

   Shop #: WSC 00001

   VCID: 53F7AC7532E47BC2C21-4B1E


7 Faults Found:
00635 - Oxygen (Lambda) Sensor Heating; Before CAT 
            31-00 - Open or Short to Ground
01247 - Activated Charcoal Filter (EVAP) System Solenoid Valve 1 (N80) 
            31-00 - Open or Short to Ground
01265 - Exhaust Gas Recirculation Valve (N18) 
            31-00 - Open or Short to Ground
00758 - Secondary Air Injection System (AIR) 
            31-00 - Open or Short to Ground
01235 - Secondary Air Injection Inlet Valve (N112) 
            31-00 - Open or Short to Ground
00553 - Mass Air Flow Sensor (G70) 
            31-00 - Open or Short to Ground
00525 - Oxygen (Lambda) Sensor (G39) 
            27-00 - Implausible Signal
Readiness: N/A


-------------------------------------------------------------------------------

Address 02: Auto Trans        Labels: 01P-927-733.lbl

   Part No: 01P 927 733 BD

   Component: AG4 Getriebe 01P    4479

   Coding: 00000

   Shop #: WSC 00000

   VCID: 76B135E1C1D60EEA05F-0964


No fault code found.


-------------------------------------------------------------------------------

Address 03: ABS Brakes        Labels: 8E0-614-111-EDS.lbl

   Part No: 7D0 614 111 B

   Component: ABS/EDS 5.3         D00

   Shop #: BB 24258

   VCID: 1B6704551AB4F382DA1-516C


No fault code found.


-------------------------------------------------------------------------------

Address 15: Airbags        Labels: None

   Part No: 7DB 909 601 BL

   Component: AIRBAG VW3 -        V04

   Coding: 16972

   Shop #: WSC 00000

   VCID: 04555F29870A2C7A0BB-4B3A


No fault code found.


-------------------------------------------------------------------------------

Address 17: Instruments        Labels: 7D0-920-xxx-17.lbl

   Part No: 7D0 920 801 A

   Component: T4-KOMBIINSTR. VDO V22

   Coding: 00161

   Shop #: WSC 00000

   VCID: 201D33B933D2D05A0F3-5160


No fault code found.


-------------------------------------------------------------------------------

Address 25: Immobilizer        Labels: 6H0-953-257.lbl

   Part No: 6H0 953 257 B

   Component: IMMO VWZ3Z0B1627449 V71

   Coding: 09600

   Shop #: WSC 00000

   VCID: 2F3FC0857E0C7F22869-4B72


No fault code found.


End----(Elapsed Time: 02:46, VBatt start/end: 14.3V/14.4V. VIgn 0.0V)------

Uwe · Mar 28, 2024

Braindead said:
I also could not find the ignition 093

Old-school: M3.8.1. Surprised to see that in a 2003. But "China" explains it.

Braindead said:
could see an ignition angle of 8,3° BTDC.

Ignition Angle is when it's firing the sparkplugs. This has nothing to do with crank-to-cam timing.

If it really only has 132 tkm on it, I doubt there is anything wrong with the timing chain. Those old 12V VR6s were pretty good that way.

All those "Short to Ground" faults: Look for a missing +12V.

-Uwe-

Braindead · Mar 28, 2024

Hello Uwe,

Thank you for answering.

There is a grinding noise on the right side of the engine and I thought it would be the timing belt.

I will look for a wiring diagram for the T4 VR6 because I am not sure how all of these components are connected.

Thank you for your help.

Braindead.

Braindead · Mar 29, 2024

I went to ErWin for an hour and took what I could but it did not help.

I found this PDF and have checked continuity between the components I could reach and the plug of the ECM/battery ground and there is continuity.

I was checking the components with VCDS and they are all OFF or using the default value.

Code:

Address 01: Engine  (021 906 256 AC)
13:34:29
  0.0 %   O2 Sensor
  0.0 %   Lambda  Regulation
  0.0 %   Lambda Learned  Part Load
  0.0 %   Lamda Learned  Idle
  1.00   Tank Vent  Oper.Mode (ACF)
  0.00 g/s   Idling Air Mass Learnt Value
  0.025 V   Lambda Probe  Voltage
  4.51 g/s   Air Mass in
  0.00 g/s   Idling Air Mass  Learned value
  0.00 g/s   Idling Air Mass  Learned value
  0.0 %   Lamda Regul.
  EGR OFF

I could see also a plug with red/white and brown/yellow unplugged but cannot see what it is in the diagram.

It appears also one ground was cut.

I am not sure how to proceed now.

I am a novice.

Braindead

GTiTDi · Mar 29, 2024

Uwe said:
If it really only has 132 tkm on it, I doubt there is anything wrong with the timing chain. Those old 12V VR6s were pretty good that way.

-Uwe-

Not necessarily, Uwe. I have had to do chains to a handful of AES engines. The guides fail and or the intermediate shaft sprocket rounds off. I drove a 99 AES for longer than I should with chain noise, when I finally dug in it was running roughly, Found the guide gone and the chain had worn the special bolt ("pin" as it is called) nearly in half.

GTiTDi · Mar 29, 2024

Braindead said:

Hello,

2003 T4 VR AES

I have runned my first diagnostic and have cleared the error codes that were showing.

A few are still present, only for the engine.

The T4 was made in China by Chin Chun Motor and most of VCDS option are not working, like resetting the services intervals (most channels are absent).

I also could not find the ignition 093 but could see an ignition angle of 8,3° BTDC. Is it out of tolerance and the timing chain need replacement?

If you have any idea on how to fix these issues that would be great.

I have checked Ross Tech Code list and most of mine are absent.

Thank you.

Braindead man.

Here is the full diag log:

Code:

VIN: LACZZZ70Z3C000206   License Plate:

Mileage: 131910km-81965mi   Repair Order:


--------------------------------------------------------------------------------

--------------------------------------------------------------------------------


Chassis Type: 7D - VW Transporter/Multivan (1996 > 2004)

Scan: 01 02 03 08 15 17 18 19 22 25 35 37 56

 

   Mileage: 131910km-81965miles

-------------------------------------------------------------------------------

Address 01: Engine        Labels: 021-906-256.lbl

   Part No: 021 906 256 AC

   Component: MOTRONIC M3.8.1  AT V01

   Coding: 00001

   Shop #: WSC 00001

   VCID: 53F7AC7532E47BC2C21-4B1E


7 Faults Found:
00635 - Oxygen (Lambda) Sensor Heating; Before CAT
            31-00 - Open or Short to Ground
01247 - Activated Charcoal Filter (EVAP) System Solenoid Valve 1 (N80)
            31-00 - Open or Short to Ground
01265 - Exhaust Gas Recirculation Valve (N18)
            31-00 - Open or Short to Ground
00758 - Secondary Air Injection System (AIR)
            31-00 - Open or Short to Ground
01235 - Secondary Air Injection Inlet Valve (N112)
            31-00 - Open or Short to Ground
00553 - Mass Air Flow Sensor (G70)
            31-00 - Open or Short to Ground
00525 - Oxygen (Lambda) Sensor (G39)
            27-00 - Implausible Signal
Readiness: N/A


-------------------------------------------------------------------------------

Address 02: Auto Trans        Labels: 01P-927-733.lbl

   Part No: 01P 927 733 BD

   Component: AG4 Getriebe 01P    4479

   Coding: 00000

   Shop #: WSC 00000

   VCID: 76B135E1C1D60EEA05F-0964


No fault code found.


-------------------------------------------------------------------------------

Address 03: ABS Brakes        Labels: 8E0-614-111-EDS.lbl

   Part No: 7D0 614 111 B

   Component: ABS/EDS 5.3         D00

   Shop #: BB 24258

   VCID: 1B6704551AB4F382DA1-516C


No fault code found.


-------------------------------------------------------------------------------

Address 15: Airbags        Labels: None

   Part No: 7DB 909 601 BL

   Component: AIRBAG VW3 -        V04

   Coding: 16972

   Shop #: WSC 00000

   VCID: 04555F29870A2C7A0BB-4B3A


No fault code found.


-------------------------------------------------------------------------------

Address 17: Instruments        Labels: 7D0-920-xxx-17.lbl

   Part No: 7D0 920 801 A

   Component: T4-KOMBIINSTR. VDO V22

   Coding: 00161

   Shop #: WSC 00000

   VCID: 201D33B933D2D05A0F3-5160


No fault code found.


-------------------------------------------------------------------------------

Address 25: Immobilizer        Labels: 6H0-953-257.lbl

   Part No: 6H0 953 257 B

   Component: IMMO VWZ3Z0B1627449 V71

   Coding: 09600

   Shop #: WSC 00000

   VCID: 2F3FC0857E0C7F22869-4B72


No fault code found.


End----(Elapsed Time: 02:46, VBatt start/end: 14.3V/14.4V. VIgn 0.0V)------

Never new a Chinese firm made T4s until now! Wow that is strange! Does it have an automatic or manual transmission? The 01Ps automatics that the american T4s came with are less than stellar, very common to fail.

Braindead · Mar 29, 2024

Hello GTiTDi,

Thank you for your answer.

It is an automatic: AG4 Getriebe 01P. No problem to my knowledge at the moment.

The chain should be changed at 168tkms but this rattle worries me. It also come and goes. I will make a video when possible.

I have first to deal with these errors, then change the suspensions (I have dead Sachs and will put Bilstein B4).

Then to the mechanic.

I have also a leak on the top driver side through the wind screen but I have a garage so it is fine until now.

There is also a TV! inside (and a phone) but it does not work. I will try to fix it too.

Brain dead.

Braindead · Mar 30, 2024

Update: I found a plug that was not connected: photo
I cleared the fault codes but they came back the same.

After this another plug next to it started leaking coolant????: photo

The diagram I found does not reall match my relay layout: photo
I have checked all the 53 and they are all good.

I have also ask help from EMEA VW but they have forwarded my request to APAC. No answer since 2 weeks; even with reminder.

I think I will give the van to a mechanic. I am frustrated to say the least as I do not find the right information on erWin or online.

Brain dead.

2003 VW T4 Chinese Engine Fault codes

Braindead

Verified VCDS User

Uwe

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Braindead

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Braindead

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GTiTDi

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Braindead

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Braindead

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