Diagnosis Procedure
- CHECK HARNESS CONNECTOR CONNECTION
Check the following harness connector for disconnection or looseness.
- CAN potential distributor electrical connector (body)
- A/C auto amp.
Is the inspection result normal?
YES
GO TO 2.
NO
Securely connect the harness connectors.
- CHECK POWER SUPPLY AND GROUND CIRCUIT
Check power supply and ground circuit for A/C auto amp. Refer to Diagnosis Procedure .
Is the inspection result normal?
YES
GO TO 3.
NO
Repair or replace the malfunctioning part.
- CHECK CIRCUIT (SHORT TO BATTERY)
- Turn ignition switch OFF.
- Disconnect the following unit connectors.
- CAN potential distributor electrical connector (body)
- A/C auto amp.
- Check voltage between CAN potential distributor electrical connector (body) harness connector and ground.
Terminals
Voltage
(Approx.)
+
-
CAN potential distributor electrical connector (body)
Ground
Connector
Terminal
M298
6
--
0 V
7
Is the inspection result normal?
YES
GO TO 4.
NO
Repair or replace harness.
- CHECK CIRCUIT (SHORT TO GROUND)
Check continuity between CAN potential distributor electrical connector (body) harness connector and ground.
CAN potential distributor electrical connector (body)
Ground
Continuity
Connector
Terminal
M298
6
--
Not existed
7
Is the inspection result normal?
YES
GO TO 5.
NO
Repair or replace harness.
- CHECK CIRCUIT (SHORT WITH CAN-H AND CAN-L)
Check continuity between CAN potential distributor electrical connector (body) harness connector terminals.
CAN potential distributor electrical connector (body)
Continuity
Connector
Terminal
Connector
Terminal
M298
6
M298
7
Not existed
Is the inspection result normal?
YES
GO TO 6.
NO
Repair or replace harness.
- CHECK CIRCUIT (OPEN)
Check continuity between the following unit harness connectors.
- CAN potential distributor electrical connector (body)
- A/C auto amp.CAN potential distributor electrical connector (body) - A/C auto amp.
CAN potential distributor electrical connector (body)
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M298
6
M36
5
Existed
7
4
Is the inspection result normal?
YES
INSPECTION END
NO
Repair or replace harness.