Quick Synopsis: 2006 Jetta BRM 5 speed
Ran great then started cutting out then wouldn't start the next day.
Replaced: Cam sensor, crank sensor, lift pump and dual pump on side of head, battery (freshly charged)
Car now starts and runs for a few seconds then shuts off due to the immobilizer after 2 seconds, CAN bus is down but K1 and K2 are good.
Traced engine bay wiring from front of block to firewall and ECU. No broken wires. A few lightly chafed up by the cooling fans and found a few chewed on up in the rain gutter but not all the way through (mouse nest right on top of the harness) and none of them were twisted pair bus wires.
Cleaned all grounds that I can locate in the engine bay.
Cleaned all the positive leads and fuses on the front of the engine bay fuse box (quite a bit of corrosion aka rust on these).
Still no dice.
Can someone post the wiring diagrams for the two harnesses that plug into the ECU so I can see which wires were chewed on and I'd like to check power to the ECU and also pin check the bus lines connected to the ECU.
Any other methods of sniffing out the wiring culprit or how to tell if the CAN bus module or ECU is bad would be helpful too.
Ran great then started cutting out then wouldn't start the next day.
Replaced: Cam sensor, crank sensor, lift pump and dual pump on side of head, battery (freshly charged)
Car now starts and runs for a few seconds then shuts off due to the immobilizer after 2 seconds, CAN bus is down but K1 and K2 are good.
Traced engine bay wiring from front of block to firewall and ECU. No broken wires. A few lightly chafed up by the cooling fans and found a few chewed on up in the rain gutter but not all the way through (mouse nest right on top of the harness) and none of them were twisted pair bus wires.
Cleaned all grounds that I can locate in the engine bay.
Cleaned all the positive leads and fuses on the front of the engine bay fuse box (quite a bit of corrosion aka rust on these).
Still no dice.
Can someone post the wiring diagrams for the two harnesses that plug into the ECU so I can see which wires were chewed on and I'd like to check power to the ECU and also pin check the bus lines connected to the ECU.
Any other methods of sniffing out the wiring culprit or how to tell if the CAN bus module or ECU is bad would be helpful too.