DavidEBSmith
Elite Explorer
- Joined
- January 26, 2004
- Messages
- 112
- Reaction score
- 2
- City, State
- Chicago, IL
- Year, Model & Trim Level
- '07 Mountaineer Premier
A while back I was getting codes P1633 (Keep alive memory voltage low) and P0449 (Canister vent valve circuit malfunction) and tracked it down to no voltage getting from the battery to the connector on the PCM. I installed a jumper wire from the battery to the wire that leads to the PCM and the codes went away, for about a year.
Now I'm getting P1633 again but not P0449. The 12V jumper is still supplying voltage. I suspect that it's feeding back downstream to the canister vent valve, so that is working and not throwing a code, but that the 12V is not getting into the PCM. The wire on the harness between the jumper and the PCM connector looks like there's some corrosion, so I suspect there might be corrosion on the pin inside the connector.
Is removing and reconnecting the PCM connector as simple as flipping the lever, pulling off the connector, and putting it back together?
I remember some bad experiences in electronics days past with connectors with delicate pins that if you didn't get everything lined up properly, it was really easy to bend pins and cause even bigger problems. Hoping automotive connectors intended for auto mechanics would not be so delicate.
Now I'm getting P1633 again but not P0449. The 12V jumper is still supplying voltage. I suspect that it's feeding back downstream to the canister vent valve, so that is working and not throwing a code, but that the 12V is not getting into the PCM. The wire on the harness between the jumper and the PCM connector looks like there's some corrosion, so I suspect there might be corrosion on the pin inside the connector.
Is removing and reconnecting the PCM connector as simple as flipping the lever, pulling off the connector, and putting it back together?
I remember some bad experiences in electronics days past with connectors with delicate pins that if you didn't get everything lined up properly, it was really easy to bend pins and cause even bigger problems. Hoping automotive connectors intended for auto mechanics would not be so delicate.