Diagnosis Procedure
- CHECK IN-VEHICLE SENSOR POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect in-vehicle sensor connector.
- Turn ignition switch ON.
- Check voltage between in-vehicle sensor harness connector and ground.
(+)
(-)
Voltage
(Approx.)
In-vehicle sensor
Connector
Terminal
M136
1
Ground
5 V
Is the inspection result normal?
YES
GO TO 2 .
NO
GO TO 4 .
- CHECK IN-VEHICLE SENSOR GROUND CIRCUIT
- Turn ignition switch OFF.
- Check continuity between in-vehicle sensor harness connector and ground.
In-vehicle sensor
(-)
Continuity
Connector
Terminal
M136
2
Ground
Yes
Is the inspection result normal?
YES
GO TO 3 .
NO
Repair harness or connector.
- CHECK IN-VEHICLE SENSOR
Check in-vehicle sensor. Refer to Component Inspection .
Is the inspection result normal?
YES
Replace A/C auto amp. Refer to Removal and Installation .
NO
Replace in-vehicle sensor. Refer to Removal and Installation .
- CHECK IN-VEHICLE SENSOR POWER SUPPLY CIRCUIT FOR OPEN
- Turn ignition switch OFF.
- Disconnect A/C auto amp. connector.
- Check continuity between in-vehicle sensor harness connector and A/C auto amp. harness connector.
In-vehicle sensor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M136
1
M137
27
Yes
Is the inspection result normal?
YES
GO TO 5 .
NO
Repair harness or connector.
- CHECK IN-VEHICLE SENSOR POWER SUPPLY CIRCUIT FOR GROUND SHORT
Check continuity between in-vehicle sensor harness connector and ground.
In-vehicle sensor
(-)
Continuity
Connector
Terminal
M136
1
Ground
No
Is the inspection result normal?
YES
GO TO 6 .
NO
Repair harness or connector.
- CHECK IN-VEHICLE SENSOR POWER SUPPLY CIRCUIT FOR POWER SHORT
- Turn ignition switch ON.
- Check voltage between in-vehicle sensor harness connector and ground.
(+)
(-)
Voltage
(Approx.)
In-vehicle sensor
Connector
Terminal
M136
1
Ground
0 V
Is the inspection result normal?
YES
Replace A/C auto amp. Refer to Removal and Installation .
NO
Repair harness or connector.