Diagnosis Procedure
- CHECK OPTICAL SENSOR POWER SUPPLY INPUT
- Ignition switch ON.
- Turn lighting switch AUTO.
- Check voltage between optical sensor harness connector and ground.
+
-
Voltage
(Approx.)
Optical sensor
Connector
Terminal
M66
1
Ground
4.65 - 5.5 V
Is the inspection result normal?
YES
GO TO 2.
NO
GO TO 4.
- CHECK OPTICAL SENSOR GROUND INPUT
- Disconnect optical sensor connector.
- Check continuity between optical sensor harness connector and ground.
Optical sensor
--
Continuity
Connector
Terminal
M66
3
Ground
Yes
Is the inspection result normal?
YES
GO TO 3.
NO
GO TO 6.
- CHECK OPTICAL SENSOR SIGNAL OUTPUT
- Connect optical sensor connector.
- With illuminating the optical sensor, check voltage between optical sensor harness connector and ground.
+
-
Condition
Voltage
(Approx.)
Optical sensor
Connector
Terminal
M66
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)
- 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
M66
1
M17
12
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
M66
1
Ground
No
Is the inspection result normal?
YES
Replace BCM. Refer to BCM : Removal & 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
M66
3
M17
30
Yes
Is the inspection result normal?
YES
Replace BCM. Refer to BCM : Removal & 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
M66
2
M17
19
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
M66
2
Ground
No
Is the inspection result normal?
YES
Replace BCM. Refer to BCM :Removal & Installation .
NO
Repair or replace harness.