P155A

DTC Logic


DTC DETECTION LOGIC

NOTE:
If DTC P155A is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
"DTC Logic" P0643.






DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

- Turn power switch OFF and wait at least 20 seconds.
- Make sure that 12V battery voltage is 11 V or more.
- GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT
1.Drive the vehicle under the following conditions.





2.Check self-diagnostic result.
Is DTC detected?
YES- Proceed to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK BATTERY TEMPERATURE SENSOR POWER SUPPLY

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





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 2.

2. CHECK BATTERY TEMPERATURE SENSOR POWER SUPPLY CIRCUIT

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





4.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- Perform the trouble diagnosis for power supply circuit. Refer to "VCM : Diagnosis Procedure" VCM.
NO- Repair or replace error-detected parts.

3. CHECK BATTERY TEMPERATURE SENSOR GROUND CIRCUIT

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





4.Also check harness for short to power.
Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace error-detected parts.

4. CHECK BATTERY TEMPERATURE SENSOR

Check the battery temperature sensor. Refer to "Component Inspection" .
Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Replace battery current sensor. Refer to "Removal and Installation" Removal And Installation.


Component Inspection


1. CHECK BATTERY TEMPERATURE SENSOR

1.Turn power switch OFF.
2.Disconnect battery current sensor harness connector.
3.Check the resistance between battery current sensor connector terminals.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace battery current sensor. Refer to "Removal and Installation" Removal And Installation.