Davie206

looks like the headlamp ecu, engine ecu and tyre pressure ecu, are wired in after the abs module and these are the modules that I get no communication with, the power steering. Suspension and power steering modules are also connected to the abs module.

We have a 2007 1.6 HDI C5 mk2 with major electrical issues. The car had is a non starter and had no communication to engine ecu with delphi or bosch kts and gave a u0015 fault on the can bus, I also used lexia on it but it will only have dialogue with the suspension ecu for which it gives a lot of faults, some related to no communication with abs module. Spent tuesday checking wiring again and fuses, relays etc. I cant see any damaged wiring or corrosion either. Finally managed to get communication to the ecu after cleaning all earths, disconnecting-reconnecting wiring and got the following faults with delphi - p1590, p0104, p0238, p0183, p1471, p0122, p0405, p0193, p0104, p0113, and a 40A Oil level gauge - No symptom fault on the BSI module. I could clear all these fault codes and all I was left with was front left and front right abs sensor faults. A bsi reset does nothing to help and after disconnecting the battery and doing a bsi reset etc I now get no communication with engine ECU again - unable to read fault codes. ABS module is recieving power, ecu is recieving power, suspension ecu is recieving power. I cant use lexia as the only module that it will communicate with it is the suspension ecu where it shows front body height sensor - Sensor power supply missing. The bsi shows signs of being in backup mode after doing a bsi reset, front sidelights come on and intermittent front wipers. Does anyone know if the abs pump on the c5 grounds to the chassis ? as it is bolted to to the chassis and the nuts/bolts holding it to the chassis are badly corroded ? Delphi kit also shows headlamp unit, power steering ecu, tyre pressure monitioring, suspension ecu as non responding modules.