Help Please!

[Liam007]

Hi guys,

I've recently had my electric hook-up and leisure battery installed However it has developed some errors now. When i turn the ignition on I get a warning about the ESC and start-stop. I plugged carista in have four warnings, I've tried both clearing and resetting but no joy so far. Here are the fault codes and the full ECU diagnostic report. Thanks for reading

Fault codes
25809
25126
00166 Access/Start Authorization Switch (E415)
00778 Steering Angle Sensor (G85)

ECU info obtained with Carista 4.1 beta-8 for Android:
VIN: WV1ZZZ7HZJH074848

Engine
Part #: 04L906056KA

Component: R4 2.0l TDI

Coding: 00114014432401090000 (hex)

Fault codes:

25809 Manufacturer-specific code

25126 Manufacturer-specific code


ABS

Part #: 7E0907379P

Component: ESC

Coding: 517E4098256984828A7D027AA48A21E679F100 (hex)

Fault codes:

00166 Access/Start Authorization Switch (E415)


Instrument cluster

Part #: 7E0920970S

Component: KOMBI

Coding: 750B010300 (hex)

[No fault codes]


Airbags

Part #: 7E0959655G

Component: VW10Airbag021

Coding: 000000000000000000000000000000003231 (hex)

[No fault codes]


Steering angle

[ECU not present]


Parking/steering assist

Part #: 7E0919475T

Component: PARKHILFE 4K

Coding: 108008 (hex)

[No fault codes]


Heater & air conditioning

Part #: 7E0907047AK

Component: Climatic-T5

Coding: 0000000003 (hex)

[No fault codes]


Central electronics

Part #: 7E0937090C

Component: BCM PQ25 Max4

Coding: B9AC39BA0A63341193284FF47EEB9E740F84710F60EC6960330400230840 (hex)

[No fault codes]


CAN network gateway

Part #: 7E0909901

Component: GW-K-CAN TP20

Coding: 042305 (hex)

Fault codes:

00778 Steering Angle Sensor (G85)


Immobilizer

Part #: 5K0953234

Component: IMMO

Coding: 000000 (hex)

[No fault codes]


Adaptive cruise control

Part #: 7N0907572C

Component: ACC Bosch PQx

Coding: 00004000FE0779 (hex)

Fault codes:

01058 Function - Constant Charge - Current

01059 Rotor Position Sensor (G159)

00274 ABS Outlet Valve - Left Rear (N134)


Battery regulator

Part #: 7E0907534

Component: Batt.regelung

Coding: 030B7A73 (hex)

[No fault codes]


Infotainment system

Part #: 1K8035150L

Component: MU-E-D-ER

Coding: 065700003C00000041111101008000001F0000C60000010001 (hex)

[No fault codes]

 

[mmi]

Steering angle

[ECU not present]

I think the culprit is the above - it's offline. Does your start/stop switch work? Does the headlight dipper/flasher switch work? They all are fed via fuse SC32 - under dash fuse box. Center row. Approx. 5th slot from top. 7.5A.

 

[Liam007]

Thanks for the suggestion, the start stop button is still working as is the light flash on the stalk. I haven't swapped the fuse as I haven't any spares.
Cheers Liam

 

[Pauly]

The towbar module takes a can connection, it’s possible when tapping into can wires that the cables to angle sensor have been disturbed/disconnected ?

 

[mmi]

Thanks for the suggestion, the start stop button is still working as is the light flash on the stalk. I haven't swapped the fuse as I haven't any spares.
Cheers Liam

Obviously that would have been too easy . As above remains CAN bus disconnect/disturbance somewhere (as it's not seen by CAN gateway).

CAN network gateway
Fault codes:00778 Steering Angle Sensor (G85)

 

[Liam007]

Cheers chaps. An easy fix would have been amazing, alas no. Have you any suggestions on how to fault find the CAN bus/streering angle sensor?

 

[mmi]

Also fuse SC51 - 5 Amps is related to Steering Angle Sensor. Right column (top slot is 59) approx. 9 down. Should be the last small one . Actually all the slots have molded numbers - though very small.

 

[Pauly]

For a module to disappear off the CAN network then there are only limited possibilities i can think off
1 - Power to the module has failed
2 - CAN signal to the module has failed
3 - The module has been unplugged
4 - The module is faulty/dead

You need to check there is a 12v supply getting to the angle sensor to power it, if there is then check the CANBUS cables supplying it (probably starting from the point the towbar canbus was joined in)

Where was the towbar can joined (im guessing under the steering wheel which is where the angle sensor is located) and how were they joined ie solder spliced onto cables or were the original cables cut and crimped together with the new ones ??

 

[Liam007]

Cheers chaps I'll have a look tomorrow and update when I know more

 

[merseyspeed]

any updates on this? I have a customer who has installed a dash cam and now has all the same "missing in action"

 

[Liam007]

No updates other than the fuse was good. I'm unsure how to check the rest of the suggestions. I'll just take it in I think.

 

[merseyspeed]

We have found that we had a missing fuse, not sure what number but it was a 5amp on the right hand side of the fuse box