CAN Bus or something else?
Hello all, I have a 2006 LT w/142K on it & ran into something that has me stumped. It started with a bad front wheel speed sensor which caused the abs light etc to illuminate on the dash. I disconnected the ABS 10A fuse until the new sensor came in & once installed, all ABS related lights were cleared & haven't returned. The car was due for inspection and after many miles of driving the EGR & EVAP monitors just won't pass, they still read "incomplete". I also had a stored U0073 code at this time which I did not have prior. After days of driving the code would eventually illuminate the MIL & usually go away shortly after. I've researched & tried many times to complete a 'drive cycle', but I'm guessing it's wasted effort with this code lingering around.
Since the code is communication related, I did some test at the DLC with a breakout box & DVOM. I get 60ohms across pins 6 & 14 w/good battery voltage & ground. With the system sleeping, nothing on, doors closed etc., I get 1.1v on pins 6 & 14. With the key in the on position (engine off) I get ZERO volts on pin 6 but 2.1v on pin 14. What little I know about Controller Area Networks was acquired in the past week, but from what I understand, I should be getting around 2.5v on pin 6 w/the key in the on position? Is there something going on with my CAN Hi (pin 6)? I only checked the 5v reference at the EGR & it was present!
The car still runs well other than being hard to start sometimes, only when the engine is hot. Any ideas, please share.