Diagnosis Procedure
- CHECK COMBINATION METER INPUT SIGNAL
- Turn ignition switch ON.
- Check voltage between the following terminals of the illumination control switch.
Illumination control switch
Condition
Voltage
(Approx.)
Connector
Terminals
M66
1
4
When illumination control switch (+) is pressed
0 V
Other than the above
5 V
2
When illumination control switch (-) is pressed
0 V
Other than the above
5 V
Is the inspection result normal?
YES
Inspection End.
NO
GO TO 2
- CHECK ILLUMINATION CONTROL SWITCH SIGNAL CIRCUIT
- Turn ignition switch OFF.
- Disconnect combination meter connector M24 and illumination control switch connector M66.
- Check continuity between combination meter harness connector and illumination control switch harness connector.
Combination meter
Illumination control switch
Continuity
Connector
Terminal
Connector
Terminal
M24
33
M66
1
Yes
34
2
- Check continuity between combination meter harness connector and ground.
Combination meter
Ground
Continuity
Connector
Terminal
M24
33
No
34
Is the inspection result normal?
YES
Check illumination control switch. Refer to Component Inspection .
NO
Repair or replace harness or connector.