Diagnosis Procedure
- CHECK HARNESS CONNECTOR CONNECTION
Check the following harness connector for disconnection or looseness.
- CAN potential distributor electrical connector (powertrain)
- ECM
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 ECM. 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 (powertrain)
- ECM
- Check voltage between CAN potential distributor electrical connector (powertrain) harness connector and ground.
Terminals
Voltage
(Approx.)
+
-
CAN potential distributor electrical connector (powertrain)
Ground
Connector
Terminal
E98
8
--
0 V
9
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 (powertrain) harness connector and ground.
CAN potential distributor electrical connector (powertrain)
Ground
Continuity
Connector
Terminal
E98
8
--
Not existed
9
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 (powertrain) harness connector terminals.
CAN potential distributor electrical connector (powertrain)
Continuity
Connector
Terminal
Connector
Terminal
E98
8
E98
9
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 (powertrain)
- ECMCAN potential distributor electrical connector (powertrain) - ECM
CAN potential distributor electrical connector (powertrain)
ECM
Continuity
Connector
Terminal
Connector
Terminal
E98
8
E48
138
Existed
9
151
Is the inspection result normal?
YES
INSPECTION END
NO
Repair or replace harness.