Diagnosis Procedure
- CHECK HARNESS CONNECTOR CONNECTION
Check the following harness connector for disconnection or looseness.
- CAN potential distributor electrical connector (powertrain)
- Fuel pump control module
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 fuel pump control module. 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)
- Fuel pump control module
- 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
M176
1
--
0 V
2
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
M176
1
--
Not existed
2
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
M176
1
M176
2
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)
- Fuel pump control moduleCAN potential distributor electrical connector (powertrain) - Fuel pump control module (For 2WD models)
CAN potential distributor electrical connector (powertrain)
Fuel pump control module
Continuity
Connector
Terminal
Connector
Terminal
M176
1
M135
3
Existed
2
4
CAN potential distributor electrical connector (powertrain) - Fuel pump control module (For AWD models)CAN potential distributor electrical connector (powertrain)
Fuel pump control module
Continuity
Connector
Terminal
Connector
Terminal
M176
1
M136
10
Existed
2
9
Is the inspection result normal?
YES
INSPECTION END
NO
Repair or replace harness.