Why is my ECM not communicating with my car?
Why is my ECM not communicating with my car?
No check engine light not even a bulb check. Fans come on when I turn key to on. Power to ECM through harness, I don’t recall what ports but the ones I was told to check. ECM relay clicks, swapped with known good. Swapped IPDM with known good.
What causes no crank and u0100 lost communication with ECM?
All the trouble was caused by a mouse chewing through some wires under the battery and fuse box. I was just going to say to check the fuse box under the hood. Mine has rattled itself loose twice. Bolted it back down after inspecting for damage and everything went back to normal.
What to do if your ECU is not communicating?
Had a guy with a confirmed good ecu come out today, still nothing, no communication. Checked fuses, swapped IPDMs with another car. I had power going to the ECU in the connector, one always and 3 when key is on.
What to do if the OBD II scanner doesn’t communicate with the vehicle?
What to do if the OBD II scanner doesn’t communicate with the vehicle. TEST 1: Connect the positive DMM lead to DLC pin 4 and the negative DMM lead to the negative battery terminal, using jumper wires if necessary. Do not connect to the body or chassis ground but to the battery terminal directly.
All the trouble was caused by a mouse chewing through some wires under the battery and fuse box. I was just going to say to check the fuse box under the hood. Mine has rattled itself loose twice. Bolted it back down after inspecting for damage and everything went back to normal.
Why is my car not connecting to the ECM?
If you can physically locate all the modules on the bus, unplugging them one at a time might identify the culprit. When you unplug the bad one, all the others should be reachable. Click to expand… Yes, this. Unplug the ebcm next and see if the tech 2 can communicate with the ecm.
What does it mean when your ECM says your car is dead?
The system logs them for any occurrence whether once a year or every minute. You need to clear them out and see how quickly they come back. If the system reports the error again immediately after clearing, then it means you’ve got a “hard” fault to the associated module.
Can a Tech 2 connect to the ECM?
Yes, this. Unplug the ebcm next and see if the tech 2 can communicate with the ecm. It’s got 7″ pistons! Mine gave all those funky codes and more too. It ended up being a main ground wire came off the block.
