Diagnosis Procedure
- CHECK DTC PRIORITY
If DTC P1554 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 CURRENT SENSOR POWER SUPPLY
- Disconnect battery current sensor harness connector.
- Turn ignition switch ON.
- Check the voltage between battery current sensor harness connector and ground.
+
-
Voltage (V)
Battery current sensor
Connector
Terminal
F5
1
Ground
Approx. 5
Is the inspection result normal?
YES
GO TO 3.
NO
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between battery current sensor harness connector and ECM harness connector.
+
-
Continuity
Battery current sensor
ECM
Connector
Terminal
Connector
Terminal
F5
3
F14
64
Existed
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 4.
NO
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT
- Check the continuity between battery current sensor harness connector and ECM harness connector.
+
-
Continuity
Battery current sensor
ECM
Connector
Terminal
Connector
Terminal
F5
4
F14
69
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 the continuity between battery current sensor harness connector and ECM harness connector.
- CHECK BATTERY CURRENT SENSOR
Check battery current sensor. Refer to Component Inspection .
Is the inspection result normal?
YES
INSPECTION END
NO
Replace battery negative cable assembly.