skyysipper
NAXJA Forum User
- Location
- California
98 XJ Automatic. Starts and runs well.
Key in turned to on position - 'no bus' and no gauges(any). Disconnecting the TCM brings the cluster back to life and odometer appears. Plug TCM back in and start xj and drive for a while and then cluster dies again...
I have swapped out the TCM and PCM and Instrument Cluster with known working modules and exactly the same every time. Disconnecting the TCM brings the cluster back to life. Sometimes flicking the wipers makes it come back to life as well.
Strange thing is the same thing happens if I turn the ignition to the on position, and then disconnect the PCM C3 connector, all the gauges come back to life - just presented with no bus, and plugging it back in makes the no bus disappear...
I have found and cleaned to bare metal every ground except G108, which I cannot find under the dash... but the pin on the cluster C2 harness tests good for that ground. (How do I get to g108??)
I have cleaned/scraped the contacts behind the cluster. Removed all the connectors held in by 10mm bolts, cleaned the contacts and tightened up. Cleaned the contacts in the 3 wire connectors near rear of engine compartment passenger side. Checked every fuse.
Is there any reason in particular that disconnecting the tcm or the pcm c3 connector and plugging it back in would bring the cluster and bus back to life????
Key in turned to on position - 'no bus' and no gauges(any). Disconnecting the TCM brings the cluster back to life and odometer appears. Plug TCM back in and start xj and drive for a while and then cluster dies again...
I have swapped out the TCM and PCM and Instrument Cluster with known working modules and exactly the same every time. Disconnecting the TCM brings the cluster back to life. Sometimes flicking the wipers makes it come back to life as well.
Strange thing is the same thing happens if I turn the ignition to the on position, and then disconnect the PCM C3 connector, all the gauges come back to life - just presented with no bus, and plugging it back in makes the no bus disappear...
I have found and cleaned to bare metal every ground except G108, which I cannot find under the dash... but the pin on the cluster C2 harness tests good for that ground. (How do I get to g108??)
I have cleaned/scraped the contacts behind the cluster. Removed all the connectors held in by 10mm bolts, cleaned the contacts and tightened up. Cleaned the contacts in the 3 wire connectors near rear of engine compartment passenger side. Checked every fuse.
Is there any reason in particular that disconnecting the tcm or the pcm c3 connector and plugging it back in would bring the cluster and bus back to life????
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