Diagnosis Procedure
- CHECK OPTICAL SENSOR POWER SUPPLY
- Turn ignition switch ON.
- Turn lighting switch AUTO.
- Check voltage between optical sensor harness connector and ground.
+
-
Voltage
Optical sensor
Connector
Terminal
M94
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
Optical sensor
Connector
Terminal
M94
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
M94
2
Ground
Optical sensor
When illuminating
3.1 V or more*
When shutting off light
0.6 V or less
*: Illuminate the optical sensor. The value may be less than the standard if brightness is weak.
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)
- Turn 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
M94
1
M120
17
Existed
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
M94
1
Ground
Not existed
Is the inspection result normal?
YES
Replace BCM. Refer to Removal and Installation .
NO
Repair or replace harness.
- CHECK OPTICAL SENSOR GROUND CIRCUIT
- Turn 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
M94
3
M120
18
Existed
Is the inspection result normal?
YES
Replace BCM. Refer to Removal and Installation .
NO
Repair or replace harness.
- CHECK OPTICAL SENSOR SIGNAL CIRCUIT (OPEN)
- Turn 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
M94
2
M120
14
Existed
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
M94
2
Ground
Not existed
Is the inspection result normal?
YES
Replace BCM. Refer to Removal and Installation .
NO
Repair or replace harness.