1.CHECK AMBIENT SENSOR POWER SUPPLY CIRCUIT
Turn the ignition switch OFF.
Disconnect ambient sensor connector.
Turn the ignition switch ON.
Check voltage between ambient sensor harness connector and ground.
(+)
(−)
Voltage
(Approx.)
Ambient sensor
—
Connector
Terminal
E76
1
Ground
5 V
Is the inspection result normal?
YES
>>
GO TO 2
.
NO
>>
GO TO 4
.
2.CHECK AMBIENT SENSOR CIRCUIT CONTINUITY
Turn the ignition switch OFF.
Disconnect the A/C auto amp. connector.
Check for continuity between the ambient sensor harness connector and A/C auto amp harness connector.
Ambient sensor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
E76
2
M66
37
Existed
Is the inspection result normal?
YES
>>
GO TO 3
.
NO
>>
Repair the harnesses or connectors.
3.CHECK AMBIENT SENSOR
Check the ambient sensor components. Refer to
Component Inspection
.
Is the inspection result normal?
YES
>>
Replace the A/C auto amp.
NO
>>
Replace the ambient sensor.
4.CHECK AMBIENT SENSOR CIRCUIT CONTINUITY
Turn the ignition switch OFF.
Disconnect the A/C auto amp. connector.
Check for continuity between the ambient sensor harness connector and A/C auto amp. harness connector.
Ambient sensor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
E76
1
M66
35
Existed
Check for continuity between ambient sensor harness connector and ground.
Ambient sensor
—
Continuity
Connector
Terminal
E76
1
Ground
Not existed
Is the inspection result normal?
YES
>>
Replace the A/C auto amp.
NO
>>
Repair the harnesses or connectors.