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Multiplex Control Unit (Driver's)

NOTE:
- Before testing, go to the Troubleshooting Guide. Initial Inspection and Diagnostic Overview Be sure to go through self-diagnosis function modes 1 and 2.
Self-Diagnosis Function (Mode 1)
Self-Diagnosis Function (Mode 2)
- All connector views are from the wire side of female terminals unless otherwise noted.

1. Remove the under-dash fuse/relay box.
2. Remove the driver's unit from the under-dash fuse/relay box.




3. Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, make the following input tests at the connector and the fuse/relay box socket.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the control unit must be faulty; replace it.




Disconnect the connectors from the removed driver's Unit.




Reinstall the driver's unit and reconnect the connectors to the unit