Diagnosis Procedure
- CHECK OPTICAL SENSOR POWER SUPPLY
- Ignition switch ON.
- Turn lighting switch AUTO.
- Check voltage between optical sensor harness connector and ground.
+
-
Voltage
(Approx.)
Optical sensor
Connector
Terminal
M72
1
Ground
4.65 - 5.5 V
Is the inspection result normal?
YES
GO TO 2.
NO
GO TO 4.
- CHECK OPTICAL SENSOR GROUND
Check voltage between optical sensor harness connector and ground.
+
-
Voltage
(Approx.)
Optical sensor
Connector
Terminal
M72
3
Ground
0 V
Is the inspection result normal?
YES
GO TO 3.
NO
GO TO 6.
- CHECK OPTICAL SENSOR SIGNAL
With illuminating the optical sensor, check voltage between optical sensor harness connector and ground.
+
-
Condition
Voltage
(Approx.)
Optical sensor
Connector
Terminal
M72
2
Ground
Optical sensor
When illuminating
5 V
When shutting off light
0 V
Is the inspection result normal?
YES
GO TO 7.
NO
Replace optical sensor. Refer to Removal and Installation .
- CHECK OPTICAL SENSOR POWER SUPPLY CIRCUIT (OPEN)
- Ignition switch OFF.
- Turn lighting switch OFF.
- Disconnect optical sensor connector and BCM connector.
- Check continuity between optical sensor harness connector and BCM harness connector.
Optical sensor
BCM
Continuity
Connector
Terminal
Connector
Terminal
M72
1
M84
28
Yes
Is the inspection result normal?
YES
GO TO 5.
NO
Repair or replace harness.
- CHECK OPTICAL SENSOR POWER SUPPLY CIRCUIT (SHORT)
Check continuity between optical sensor harness connector and ground.
Optical sensor
--
Continuity
Connector
Terminal
M72
1
Ground
No
Is the inspection result normal?
YES
Replace BCM. Refer to Removal and Installation .
NO
Repair or replace harness.
- CHECK OPTICAL SENSOR GROUND CIRCUIT
- Ignition switch OFF.
- Disconnect optical sensor connector and BCM connector.
- Check continuity between optical sensor harness connector and BCM harness connector.
Optical sensor
BCM
Continuity
Connector
Terminal
Connector
Terminal
M72
3
M84
29
Yes
Is the inspection result normal?
YES
Replace BCM. Refer to Removal and Installation .
NO
Repair or replace harness.
- CHECK OPTICAL SENSOR SIGNAL CIRCUIT (OPEN)
- Ignition switch OFF.
- Disconnect optical sensor connector and BCM connector.
- Check continuity between optical sensor harness connector and BCM harness connector.
Optical sensor
BCM
Continuity
Connector
Terminal
Connector
Terminal
M72
2
M84
8
Yes
Is the inspection result normal?
YES
GO TO 8.
NO
Repair or replace harness.
- CHECK OPTICAL SENSOR SIGNAL CIRCUIT (SHORT)
Check continuity between optical sensor harness connector and ground.
Optical sensor
--
Continuity
Connector
Terminal
M72
2
Ground
No
Is the inspection result normal?
YES
Replace BCM. Refer to Removal and Installation .
NO
Repair or replace harness.