Need Advise on PCM Grounding.
Thread Starter
Racer
Joined: Feb 2006
Posts: 269
Likes: 0
From: Vancouver B.C.
Need Advise on PCM Grounding.
Codes: H21 (TPS)
Voltage reading way low (.32 - 3.7) although the book says code 21 is voltage too high. Inspected (accessable) wiring to PCM, all look fine. Replaced TPS w/new.....same low reading.
Wiper ground problem as well. Had to ground it out to work.
Also, Cruise Control not working, although have yet to diagnose that.
This all happened suddenly after a 4 month storage. So, I suspect a ground issue in my PCM? Checked/cleaned all the 'known' grounds (7 wire bundle from harness to engine) as well as ground strap from chassis to block.
All to no avail.
Any suggestions?
Still pulling code 21, still failing sniffer (high HC's - rich) still running excellent.
Voltage reading way low (.32 - 3.7) although the book says code 21 is voltage too high. Inspected (accessable) wiring to PCM, all look fine. Replaced TPS w/new.....same low reading.
Wiper ground problem as well. Had to ground it out to work.
Also, Cruise Control not working, although have yet to diagnose that.
This all happened suddenly after a 4 month storage. So, I suspect a ground issue in my PCM? Checked/cleaned all the 'known' grounds (7 wire bundle from harness to engine) as well as ground strap from chassis to block.
All to no avail.
Any suggestions?
Still pulling code 21, still failing sniffer (high HC's - rich) still running excellent.
