JL TT

I have the following intermittent CANbus faults: AWD to/from ECU and AWD to/from ABS. Because AWD comm is implicated in all faults, the fault must be either:
1) AWD module
2) AWD connector (possibly, but other pins are OK)
3) CANbus node in the wiring harness (will NEVER find this)

I plan on checking resistance from ABS to AWD on high/low CAN lines.

Does anyone have experience with this fault or any other suggestions for troubleshooting (VAG-COM just unpacked and Bentley CD in the mail... to impatient to wait)!

Bonus question: the ESP lamp is illuminated on the dash. Does this mean only ESP is inactive or AWD as well? The Bentley repair manual does not clearly advise.

Uwe@Ross-Tech.com

This is a fairly common issue. But since you're new, I'll say that it couldn't hurt to post a complete auto-scan so people can see exactly what faults you've go in which modules, and what the module part numbers are. Use to Copy or Save buttons on the Auto-Scan screen.

-Uwe-

JL TT

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Address 03: ABS Brakes Labels: 8N0-907-379.LBL
Part No: 8N0 907 379 E
Component: ESP 20 CAN V005
Coding: 18446
Shop #: WSC 01236

1 Fault Found:
01324 - Control Module for All Wheel Drive (J492)
49-00 - No Communications

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Address 22: AWD Labels: 02D-900-554.LBL
Part No: 02D 900 554 B
Component: HALDEX LSC ECC 0006

3 Faults Found:
01312 - Powertrain Data Bus
37-00 - Faulty
01316 - ABS Control Module
49-10 - No Communications - Intermittent
01314 - Engine Control Module
49-10 - No Communications - Intermittent

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