- Joined
- June 16, 2003
- Messages
- 31,592
- Reaction score
- 3,273
- City, State
- Humboldt, KS
- Year, Model & Trim Level
- 2000 Mounty
1997 mounty 5.0 Belongs to Cybergasm.
Displays p0117 after a few minutes. Idle starts to vary by dropping out and recovering once code is displayed.
Ok break out the wiring diagram and play along please.
Key on engine off voltage check on ECT wire harness (sensor disconnected) is .3v on grey w red stripe wire, 0 on signal wire
sooo
moving over to IAT sensor I see 5v on the gray wire--and the same .3z on the grey with red stripe wire. ( IAT sensor disconnected)
moving over to the TPS I measure the same .3v on the 5v supply wire (grey with red stripe) and a weird 5v on the brown with white stripe wire, also with sensor disconnected. All volatges are harness readings.
For all 5v sensors the grey with red stripe wire is the 5v source. I am reading .3v. However on the ground to the TPS, and, signal wire from IAT I am reading 5v.
I tried disconnecting various 5v sensors with no change, however we have not made it to the dpfe sensor yet.
It would seem the 5v sensor supply line is shorted-however with the 5v present on the signal side---I have to ask
PCM toast?
Is there anything More you would like me to check? Thanks
Displays p0117 after a few minutes. Idle starts to vary by dropping out and recovering once code is displayed.
Ok break out the wiring diagram and play along please.
Key on engine off voltage check on ECT wire harness (sensor disconnected) is .3v on grey w red stripe wire, 0 on signal wire
sooo
moving over to IAT sensor I see 5v on the gray wire--and the same .3z on the grey with red stripe wire. ( IAT sensor disconnected)
moving over to the TPS I measure the same .3v on the 5v supply wire (grey with red stripe) and a weird 5v on the brown with white stripe wire, also with sensor disconnected. All volatges are harness readings.
For all 5v sensors the grey with red stripe wire is the 5v source. I am reading .3v. However on the ground to the TPS, and, signal wire from IAT I am reading 5v.
I tried disconnecting various 5v sensors with no change, however we have not made it to the dpfe sensor yet.
It would seem the 5v sensor supply line is shorted-however with the 5v present on the signal side---I have to ask
PCM toast?
Is there anything More you would like me to check? Thanks