|
D2 - Interior Electrics Airbags, Sensors, climate modules, instrument clusters, switches etc |
|
Thread Tools | Display Modes |
#11
|
|||
|
|||
I would scan the car with VCDS first and go from there. I've had both front abs sensors go and they didn't reduce performance or anything like that.
|
#12
|
|||
|
|||
Quote:
Cant scan as my computer isnt with me.
__________________
Paul Gosport UK ________________________ Audi S8 2002 FE Avus Silver / Extended Red Leather. Daily Driver: BMW 3 series GT - Just more practical for my camping trips! |
#13
|
|||
|
|||
When abs works you feel the brake pedal vibrate and there is a distinct buzz of the abs pump, the brakes will never just randomly grab like when driving with adaptive cruise control etc.
My front abs sensors started to play up when going over bumps and the above is exactly what I would get. The fault was later narrowed down to the piece of ABS sensor which goes from the strut to the body, it simply got worn out after 20+ years. If it is the sensors for you, i made a guide showing how to make them for around £30 instead of paying £399 for new ones. |
#14
|
||||
|
||||
A blast from the past. From what I remember at the time, I removed and cleaned all the ABS sensors, which didn't seem that bad, followed the suggestion by ainarssems of monitoring the measuring blocks and they were fine. I also replaced a MAF at some point, but don't remember if it was to do with the same issue.
If the lights came on and went off again, scanning for errors may not show up anything if you switch the engine off, as they clear themselves. Not sure about anyone else, but I've never plugged in the VCDS cable when the ignition was on or engine running, as worried it might cause damage. Not sure if it's related and don't want to muddy the waters, but since you'll be plugging in VCDS, check out the brake switch measuring blocks in module 01-Engine, address 66. Untouched it should read 0000, a slight push with your finger should read 1010, and a little bit more pressure should read 1011. Only because you mentioned a 'reduction in power', and if the ECU thinks the brake switch has been depressed, it will reduce the power.
__________________
2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts Sold! 2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:LY7F Suzuka Grey Pearl Effect, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II Headlights My DIY jobs - Fan Jet Windscreen Washers, Retrofitted Electric Side Blinds |
#15
|
|||
|
|||
One of the biggest advantages of VCDs is loggin live data while the engine is running and the car is moving.
You can even save it to a text file and plot a graph with excell, I did that when diagnosing my abs sensors. |
#16
|
|||
|
|||
I found a VAG guy in Hexham who scanned the car, no faults present. Car was covered in 'muck n bullets' so kindly power washed it down. Driven over 120 miles today and not a murmur, drove in its normal 'sublime' mode. Took it back for another scan and still nothing logged.
Im travelling back down south tomorrow (via the A8 Parts Store in Stockton) so will see what occurs. Hopefully nothing. Thanks for all your input.
__________________
Paul Gosport UK ________________________ Audi S8 2002 FE Avus Silver / Extended Red Leather. Daily Driver: BMW 3 series GT - Just more practical for my camping trips! |
#17
|
|||
|
|||
Well, found some time in break from work to scan the car using VCDS light. Now have some codes. One thing of note that there is a lot of intermittent codes popping up so thinking loose connections somewhere?
VCDS-Lite Windows Based VAG/VAS Emulator Version: Release 1.2 www.Ross-Tech.com Workshop Code: 000 00000 Self-Diagnosis Log Sunday, 26 March 2023, 15:19:45:59133 VIN Number: WAUZZZ4DX2N007670 License Plate: PL02FKF Mileage: 174544 Repair Order: Chassis Type: 4D - Audi A8 D2 Scan: 25,01,03,08,11,15,16,17,18,35,37,45,55,56,57,65,67 ,75,76,77,02 ------------------------------------------------------------------------------- Address 08: Auto HVAC Labels: Redir Fail! Controller: 4D0 820 043 Q Component: A8-Klimavollautomat D13 Coding: 00081 Shop #: WSC 02313 VCID: 2A276756C5E7 No fault code found. ------------------------------------------------------------------------------- Address 15: Airbags Labels: 4D0-959-655-AI8.LBL Controller: 4D0 959 655 T Component: Airbag Front+Kopf 5001 Coding: 01417 Shop #: WSC 02335 VCID: 43F92AF2428D 1 Fault Found: 01219 - Rear Airbag Igniter; Driver Side (N201) 33-00 - Resistance too Low ------------------------------------------------------------------------------- Address 17: Instruments Labels: 4D0-919-033-MYW.LBL Controller: 4D0 919 035 BA Component: KOMBI+WEGFAHRS.VDO D39 Coding: 00483 Shop #: WSC 02313 VCID: 66BFD366117F WAUZZZ4DX2N007670 AUZ7Z0A1942430 No fault code found. ------------------------------------------------------------------------------- VCDS-Lite Self-Diagnosis Log Sunday, 26 March 2023, 15:19:45:59133 Page 2 VIN Number: WAUZZZ4DX2N007670 License Plate: PL02FKF Address 35: Centr. Locks Labels: 8D0-862-257.LBL Controller: 8L0 862 257 P Component: CV-Pump, Alarm, RC D17 Coding: 15178 Shop #: WSC 02313 VCID: 42F72FF65D97 3 Faults Found: 01370 - Alarm triggered by Interior Monitoring 35-00 - - 01369 - Alarm triggered by Hood Switch 35-00 - - 01134 - Alarm Horn (H12) 49-00 - No Communications ------------------------------------------------------------------------------- Address 37: Navigation Labels: None Controller: 4D0 035 192 M Component: RNS 4.2 H06 BNO 0102 VCID: 2925985AC0E1 1 Fault Found: 00862 - Antenna for GPS Navigation (R50/R52) 44-00 - Short Circuit ------------------------------------------------------------------------------- Address 45: Inter. Monitor Labels: None Controller: 4D0 951 177 B Component: Innenraumueberw. D06 Coding: 00001 Shop #: WSC 00000 VCID: 28239D5EDBEB No fault code found. ------------------------------------------------------------------------------- Address 55: Xenon Range Labels: 4Z7-907-357.LBL Controller: 4Z7 907 357 Component: dynamische LWR D07 Coding: 00001 Shop #: WSC 00000 VCID: 047BE9EE0703 No fault code found. ------------------------------------------------------------------------------- VCDS-Lite Self-Diagnosis Log Sunday, 26 March 2023, 15:19:45:59133 Page 3 VIN Number: WAUZZZ4DX2N007670 License Plate: PL02FKF Address 56: Radio Labels: None Controller: 4D0 035 192 M Component: Radio BNO 0001 Coding: 00207 Shop #: WSC 00652 VCID: 2925985AC0E1 1 Fault Found: 00852 - Loudspeaker(s); Front 36-00 - Open Circuit ------------------------------------------------------------------------------- Address 76: Park Assist Labels: 4D0-919-283.LBL Controller: 4D0 919 283 PÆu Component: arkingsystem A8 RDW D07 Coding: 01108 Shop #: WSC 00000 VCID: 7399BA3252AD No fault code found. ------------------------------------------------------------------------------- Address 02: Auto Trans Labels: 01L-927-156.LBL Controller: 4D0 927 156 EC Component: AG5 01L 4.2l5V RdW 1010 Coding: 00101 Shop #: WSC 02313 VCID: 6EAFAB46398F 1 Fault Found: 18265 - Load Signal: Error Message from ECU P1857 - 35-10 - - - Intermittent End -------------------------------------------------------------------------------------------------- Also: Control Module Part Number: 4D0 907 559 AA Component and/or Version: 4.2L V8/5V G 0002 Software Coding: 10753 Work Shop Additional Info: WAU CZoZdZe4 WXS2NC0 0007060700 AUZ7Z0A1942430 6 Faults Found: 17931 - Crash Signal from Airbag Controller: Implausible Signal P1523 - 35-00 - - 17981 - Left Engine Mount Solenoid Valve (N144): Open Circuit P1573 - 35-10 - - - Intermittent 17834 - EVAP Purge Valve (N80): Open Circuit P1426 - 35-10 - - - Intermittent 17985 - Right Engine Mount Solenoid Valve (N145): Open Circuit P1577 - 35-10 - - - Intermittent 17841 - Secondary Air Pump Relay (J299): Open Circuit P1433 - 35-10 - - - Intermittent 16486 - Mass Air Flow Sensor (G70): Signal too Low P0102 - 35-10 - - - Intermittent Readiness: 0010 0001 I have managed to clear all intermittent codes.
__________________
Paul Gosport UK ________________________ Audi S8 2002 FE Avus Silver / Extended Red Leather. Daily Driver: BMW 3 series GT - Just more practical for my camping trips! |
#18
|
||||
|
||||
Quote:
Quote:
This might be as a result of the error in address 15 above.
__________________
2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts Sold! 2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:LY7F Suzuka Grey Pearl Effect, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II Headlights My DIY jobs - Fan Jet Windscreen Washers, Retrofitted Electric Side Blinds |
#19
|
|||
|
|||
The crash signal implausible is a peculiarity of this car that I couldn't solve. I changed all the ecus which can interact with the crash signal, to no avail, checked the wiring - all fine, sometimes it'll clear and go away for a bit, sometimes it comes back straight away. Its most puzzling. It could be something to do with canbus identities, since this one had so many replacement parts. Its the one code I couldn't get to the bottom of, but doesn't appear to affect anything and doesn't give any warning lights.
The engine codes are likely a bad connection in the ECU box. Pop the lid, and pull each connector in turn and give them a spray of WD40 and then put them back. I'll have a look at the diagrams when I get a chance and see if they all go through the same connector, or have a common supply or ground. Keep a close eye on the MAF error and load signal implausible in the TCU as that can have an impact on the gearbox, both shift quality and consequently longevity. If it has a common supply or ground with the other bits that are having issues then it could simply not be giving a signal at times, but if its actually failed and giving a duff load signal that needs sorting asap. I think its not terrible to change the rear seat airbags if that code is persistent after fiddling with the connector. I have plenty of spare seats which can donate one. |
#20
|
||||
|
||||
Quote:
I searched that 17931 error code and came across the following post - note the 'Special Notes'. With your understanding of these cars, does it sound like a feasible solution? http://wiki.ross-tech.com/wiki/index...1/P1523/005411 I've also attached a section of the wiring diagram (p.25) from Current Flow Basic equipment From model year 2001.pdf showing the 'crash wire' (A125). E3 is the hazard warning switch.
__________________
2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts Sold! 2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:LY7F Suzuka Grey Pearl Effect, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II Headlights My DIY jobs - Fan Jet Windscreen Washers, Retrofitted Electric Side Blinds |
|
|