PR25DD engine
- CHECK DTC PRIORITY
If DTC P1553 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 Index .
NO
GO TO 2.
- CHECK BATTERY CURRENT SENSOR POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect battery current sensor harness connector.
- Turn ignition switch ON.
- Check the voltage between battery current sensor harness connector and ground.
+
-
Voltage
(Approx.)
Battery current sensor
Connector
Terminal
E46
1
Ground
5 V
Is the inspection result normal?
YES
GO TO 4.
NO
GO TO 3.
- CHECK SENSOR POWER SUPPLY 2 CIRCUIT
Refer to Diagnosis Procedure .
Is the inspection result normal?
YES
Perform the trouble diagnosis for power supply circuit.
NO
Repair or replace error-detected parts.
- 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
E46
3
F91
45
Existed
- Also check harness for short to power.
Is the inspection result normal?
YES
GO TO 5.
NO
Repair or replace error-detected parts.
- 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
E46
4
F91
56
Existed
- Also check harness for short to ground and to power.
Is the inspection result normal?
YES
GO TO 6.
NO
Repair or replace error-detected parts
- Check the continuity between battery current sensor harness connector and ECM harness connector.
- CHECK BATTERY CURRENT SENSOR
Check the battery current sensor. Refer to Component Inspection .
Is the inspection result normal?
YES
Check intermittent incident. Refer to Inspection .
NO
Replace battery negative cable assembly.