Fault diagnosis, instrument lighting (MIU1)
Fault diagnosis, instrument lighting (MIU 1) |
Fault symptoms
The instrument background lighting is inoperative when the rheostat is activated but the other instrument lighting is OK.Diagnostic procedure
1. |
Unplug the main instrument display
panel's 3 connectors and connect the Scan Tool's test leads to pin 12 (12p-2)
and ground. Then select "TEST" followed by "PULSE".
If in proper working order, the reading obtained should be between 53 and 93 Hz. The ignition should be switched on. |