Jag XJ8 (X308) 3.2 1998 - ABS problems, faults will not clear #
Posted by Paul Howd on August 23, 2011, 7:16 pm
Year of Manufacture *: 1998
Now, the most obvious explanation is that the faults wont clear because they are still present. However I am coming round to thinking that this is not infact the case.. Hence the post.
The car is my own and is currently off the road.
I am getting ABS warning light on. I am getting fault codes (Using multiscan with current software)
C1145 (FR Sensor) B1676 Battery voltage ouit of range U2012 Can fault.
I am also getting transmission fault codes;
P1798 CAN MALF P1799 CAN TCM/ABS malf
(Autodata is particularly unhelpfull in this case the descriptions are from the scanner display with no further explanations or circuit/system information available)
Now, this is where it gets interesting. After trying to find out where the sensor fault might be I disconnected the left hand sensor to create a false fault to see if the scan tool would pick it up (which it did) But the fault code remained persistant and un-eraseable even when the sensor was reconnected so I am now thinking that all these codes are red herrings which I cannot clear (The battery has run down and been recharged, the FR sensor was disconected when I replaced the wheel bearing and it is possible that the CAN faults refer to when I was checking supply voltages to the ABS ECU during earlier fault tracing)
Now, before I take it to Jaguar,
1) Is my analysis reasonable?
2) Assuming that I am correct, is the failure to erase likly to be a scanner issue or is it indicative of possible other vehicle problems?
3) Is there an alternative way of clearing these fault codes (EG Connecting pins to ground etc)
Re: Jag XJ8 (X308) 3.2. ABS problems-faults wont clear
I understand that these vehicles ARE rather sensitive to battery voltage and that failing batteries can cause issues, But what limits does the diagnostics use to decide whether there is a problem or not!
I can get "precise" voltages for cranking, idle, standby etc tomorrow but my impression thus far is that they are all well within what would be considererd "acceptable" for any normal vehicle.