P1554

P1554 BATTERY CURRENT SENSOR

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PERFORM COMPONENT FUNCTION CHECK

Perform component function check. .
NOTE:
Use component function check to check the overall function of the battery current sensor circuit. During this check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES- INSPECTION END
NO- Go to .


Component Function Check


1. PRECONDITIONING

TESTING CONDITION:
-Before performing the following procedure, confirm that battery voltage is more than 12.8 V at idle.
-Before performing the following procedure, confirm that all load switches and A/C switch are turned
OFF.
- GO TO 2.

2. PERFORM COMPONENT FUNCTION CHECK

With CONSULT
1.Perform "INSPECTION MODE 5". Description.
2.Start engine and let it idle.
3.Select "BAT CUR SEN" in "DATA MONITOR" mode of "ENGINE" with CONSULT.
4.Check "BAT CUR SEN" indication for 10 seconds.
"BAT CUR SEN" should be above 2,300 mV at least once.

Without CONSULT
1.Perform "INSPECTION MODE 5". Description.
2.Start engine and let it idle.
3.Check the voltage between ECM harness connector terminals as per the following.





Is the inspection result normal?
YES- INSPECTION END
NO- Go to


Diagnosis Procedure


1. CHECK GROUND CONNECTION

1.Turn ignition switch OFF.
2.Check ground connection M95. Refer to Ground Inspection in Circuit Inspection.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace ground connection.

2. CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT-I

1.Disconnect battery current sensor harness connector.
2.Turn ignition switch ON.
3.Check the voltage between battery current sensor harness connector and ground.





Is the inspection result normal?
YES- GO TO 6.
NO- GO TO 3.

3. CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT-II

1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check the continuity between battery current sensor harness connector and ECM harness connector.





Is the inspection result normal?
YES- GO TO 5.
NO- GO TO 4.

4. DETECT MALFUNCTIONING PART

Check the following.
- Harness connectors F103, M116
- Harness connectors B14, M12
- Harness for open between battery current sensor and ECM
- Repair open circuit.

5. CHECK SENSOR POWER SUPPLY 2 CIRCUIT

Check sensor power supply 2 circuit. Testing and Inspection.
Is the inspection result normal?
YES- GO TO 11.
NO- Repair short to ground or short to power in harness or connectors.

6. CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check the continuity between battery current sensor harness connector and ECM harness connector.





4.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 8.
NO- GO TO 7.

7. DETECT MALFUNCTIONING PART

Check the following.
- Harness connectors F103, M116
- Harness connectors B14, M12
- Harness for open or short between battery current sensor and ECM
- Repair open circuit, short to ground or short to power in harness or connectors.

8. CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.Check the continuity between battery current sensor harness connector and ECM harness connector.





2.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 10.
NO- GO TO 9.

9. DETECT MALFUNCTIONING PART

Check the following.
- Harness connectors F103, M116
- Harness connectors B14, M12
- Harness for open or short between battery current sensor and ECM
- Repair open circuit, short to ground or short to power in harness or connectors.

10. CHECK BATTERY CURRENT SENSOR

.
Is the inspection result normal?
YES- GO TO 11.
NO- Replace 12V battery negative cable assembly.

11. CHECK INTERMITTENT INCIDENT

Intermittent Incident.
- INSPECTION END


Component Inspection


1. CHECK BATTERY CURRENT SENSOR

1.Turn ignition switch OFF.
2.Reconnect harness connectors disconnected.





3.Disconnect 12V battery negative cable (1).





4.Install jumper cable (A) between 12V battery negative terminal and body ground.
5.Turn ignition switch ON.
6.Check the voltage between ECM harness connector terminals as per the following.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace 12V battery negative cable assembly.