Diagnosis Procedure
- CHECK DTC PRIORITY
If DTC P1556 or P1557 is displayed with DTC P0643 first perform the trouble diagnosis for DTC P0643.
Is applicable DTC detected?
YES
Perform diagnosis of applicable. Refer to DTC Description .
NO
GO TO 2 .
- CHECK BATTERY TEMPERATURE SENSOR INPUT SIGNAL CIRCUIT-I
- Disconnect battery current sensor harness connector.
- Turn ignition switch ON.
- Check the voltage between battery current sensor harness connector and ground.
Battery current sensor
Ground
Voltage (V)
Connector
Terminal
E161
2
Ground
Approx. 5
Is the inspection result normal?
YES
GO TO 4 .
NO
GO TO 3 .
- CHECK BATTERY TEMPERATURE SENSOR INPUT SIGNAL CIRCUIT-II
- Turn ignition switch ON.
- Disconnect ECM harness connector.
- Check the continuity between battery current sensor harness connector and ECM harness connector.
Battery current sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E161
2
F78
32
Existed
Is the inspection result normal?
YES
Perform the trouble diagnosis for power supply circuit. Refer to Diagnosis Procedure .
NO
Repair open circuit.
- CHECK BATTERY TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between battery current sensor harness connector and ECM harness connector.
Battery current sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E161
3
F78
43
Existed
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 5 .
NO
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK BATTERY TEMPERATURE SENSOR
Refer to Component Inspection (Battery Temperature Sensor) .
Is the inspection result normal?
YES
INSPECTION END
NO
Replace battery negative cable assembly.