1.9TDi wont start when traction control light is on

[Masterkm]

Hope someone can shed some light on this for me as to whats caused it. When going out to the car sometimes the traction control (esp) light is on and the car fails to turn over. The car is my brothers and he has been experiencing it sometimes when its cold but happens alot on a warm start. Takes ages to get the car started and when the key is in the ignition before the engine is started (when the VAGCOM scan was done) the fans were kicking in straight away for some reason

A used VAGCOM to see what would come up and quite a few faults showed up but dont know what the exact cause is. Here are the main bits from the scan and we have checked rosstechs website to try and shed some light but has anyone experienced this:

00-Steering Angle Sensor -- Status: OK 0000
01-Engine -- Status: Sporadic communication error 1000
03-ABS Brakes -- Status: Malfunction 0010
08-Auto HVAC -- Status: Malfunction 0010
09-Cent. Elect. -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: Malfunction 0010
19-CAN Gateway -- Status: Malfunction 0010
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: Malfunction 0010
46-Central Conv. -- Status: OK 0000

Address 01: Engine Labels: 03G-906-016-BKC.lbl
Part No SW: 03G 906 016 B HW: 028 101 147 8
Component: R4 1,9L EDC 5645
Shop #: WSC 01287 785 00200
VCID: 22405DE2FDD4D03

No Faults Found
or DTCs not supported by controller
or a communication error occurred

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 1K0-907-379-MK60-F.lbl
Part No: 1K0 907 379 K
Component: ESP FRONT MK60 0103
Coding: 0021121
Shop #: WSC 01287 785 00200
VCID: 3A7085827544B83

2 Faults Found
01314 - Engine Control Module
013 - Check DTC Memory - Intermittent
01314 - Engine Control Module
004 - No Signal/Communication

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 1K0-820-047.lbl
Part No: 1K0 820 047 CB
Component: Climatic PQ35 080 0201
Shop #: WSC 00000 000 00000
VCID: 66C801F2517CEC3

1 Fault Found
01314 - Engine Control Module
013 - Check DTC Memory

-------------------------------------------------------------------------------
Address 09: Cent. Elect. Labels: 3C0-937-049-23-M.lbl
Part No SW: 1K0 937 049 K HW: 1K0 937 049 K*
Component: Bordnetz-SG 1.0 H30 0701
Revision: 00030000 Serial number: 00000000444002
Coding: 00890F0600041800001400001400000000
Shop #: WSC 00000 000 00000
VCID: 37769CB64656A5B

Subsystem 1 - Part No: 1K2 955 119 B
Component: Wischer VW350 012 0401
Coding: 00065493
Shop #: WSC 00000

4 Faults Found
01314 - Engine Control Module
004 - No Signal/Communication
00188 - Control Circuit 1; Relay for Supply Voltage Terminal 50
010 - Open or Short to Plus - Intermittent
00187 - Control Circuit; Relay for Supply Voltage Terminal 75X
010 - Open or Short to Plus - Intermittent
01800 - Light Switch (E1)
008 - Implausible Signal - Intermittent

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 1K0-920-xxx-17.lbl
Part No: 1K0 920 950 L
Component: KOMBIINSTRUMENT VDD 3554
Coding: 0001401
Shop #: WSC 00578 210 64257
VCID: 3162A2AEA8327BB

1 Fault Found
01314 - Engine Control Module
004 - No Signal/Communication

-------------------------------------------------------------------------------
Address 44: Steering Assist Labels: 1Kx-909-14x-44.clb
Part No: 1K2 909 144 E
Component: EPS_ZFLS Kl.2 1202
Shop #: WSC 00000 000 00000
VCID: 2E58B9D2B90C643

2 Faults Found
01314 - Engine Control Module
004 - No Signal/Communication
Freeze Frame:
Mileage: 520 km
Temperature: 23.0°C
Voltage: 12.00 V
Voltage: 11.80 V

00778 - Steering Angle Sensor (G85)
004 - No Signal/Communication - Intermittent
Freeze Frame:
Mileage: 1480 km
Count: 0
Steering Angle: 1.40°


As you can see from the scan the 01314 is showing up alot, does this mean something is up with the ECU?

 

[MJ]

Either ECU relay or broken main feed to that relay which lives in the engine bay fuse holder.

Swap the relay or take the battery box out and check for broken wires under or around it.

The fault indicates no voltage at the ecu with the ignition on.

 

[Masterkm]

Thanks, will get my brother to check this out tomorrow. Its been going on for sometime now as he had a subwoofer and power cap fitted which I personally think caused it all. Someone has suggested via PM that it could need a stronger earthing cable/point from the battery.

 

[MJ]

Or they've used the same earth point to earth the sub and ecu and left it loose...

 

[Masterkm]

Thanks for the tips, doesnt look like an expensive fix for now.

 

[WHOZBOSS]

Thanks for the tips, doesnt look like an expensive fix for now.

Lets hope so

 

[WHOZBOSS]

http://www.mk5golfgti.co.uk/forum/index.php/topic,72130.0.html

 

[Masterkm]

Thats his car mate he wasnt get much info from there so gave it a shot with the guys here who I know are very knowledgable

 

[Masterkm]

Just had a reply from Midland VW saying that its most likely the ECU on its way out and that would require a new/used one. Thats going to be the last resort

 

[MJ]

That's an expensive stab in the dark!

It'd make much more sense to condemn and try a £15 relay instead of a £500+ ecu, which myself or my colleagues have never come across but chaffed wires and dead relays we have.

 

[Masterkm]

Would you be able to suggest which one the ECU relay is and the Fuel pump relay in the fuse box?

Thanks

 

[MJ]

Main ecu relay is the big one at the front of the fuse box in the engine bay.

 

[@udi A3]

Ive seen those faults with a fried ecu, but would need more diagnosis to confirm, wouldnt just stab in the dark and replace t anyway! MJ is on the right track im sure.