Diagnosis Procedure
- CHECK AMBIENT SENSOR POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect ambient sensor connector.
- Turn ignition switch ON.
- Check voltage between ambient sensor harness connector and ground.
(+)
(-)
Voltage
(Approx.)
Ambient sensor
Connector
Terminal
E75
2
Ground
5 V
Is the inspection result normal?
YES
GO TO 2 .
NO
GO TO 4 .
- CHECK AMBIENT SENSOR GROUND CIRCUIT
- Turn ignition switch OFF.
- Check continuity between ambient sensor harness connector and ground.
Ambient sensor
(-)
Continuity
Connector
Terminal
E75
1
Ground
Yes
Is the inspection result normal?
YES
GO TO 3 .
NO
Repair harness or connector.
- CHECK AMBIENT SENSOR
Check ambient sensor. Refer to Component Inspection .
Is the inspection result normal?
YES
Replace A/C auto amp. Refer to Removal and Installation .
NO
Replace ambient sensor. Refer to Removal and Installation .
- CHECK AMBIENT SENSOR POWER SUPPLY CIRCUIT FOR OPEN
- Turn ignition switch OFF.
- Disconnect A/C auto amp. connector.
- Check continuity between ambient sensor harness connector and A/C auto amp. harness connector.
Ambient sensor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
E75
2
M137
7
Yes
Is the inspection result normal?
YES
GO TO 5 .
NO
Repair harness or connector.
- CHECK AMBIENT SENSOR POWER SUPPLY CIRCUIT FOR GROUND SHORT
Check continuity between ambient sensor harness connector and ground.
Ambient sensor
(-)
Continuity
Connector
Terminal
E75
2
Ground
No
Is the inspection result normal?
YES
GO TO 6 .
NO
Repair harness or connector.
- CHECK AMBIENT SENSOR POWER SUPPLY CIRCUIT FOR POWER SHORT
- Turn ignition switch ON.
- Check voltage between ambient sensor harness connector and ground.
(+)
(-)
Voltage
(Approx.)
Ambient sensor
Connector
Terminal
E75
2
Ground
0 V
Is the inspection result normal?
YES
Replace A/C auto amp. Refer to Removal and Installation .
NO
Repair harness or connector.