P1556

P1556, P1557 BATTERY TEMPERATURE SENSOR





DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
Turn ignition switch OFF and wait at least 10 seconds.
- GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine and let it idle at least 10 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES - Proceed to SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK BATTERY TEMPERATURE SENSOR INPUT SIGNAL 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 7.
NO - GO TO 2.
2.CHECK BATTERY TEMPERATURE SENSOR INPUT SIGNAL CIRCUIT-II
1. Turn ignition switch ON.
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 3.
NO - Repair open circuit.
3.CHECK SENSOR POWER SUPPLY CIRCUIT
Check harness for short to power and short to ground, between the following terminals.





Is the inspection result normal?
YES - GO TO 4.
NO - Repair short to ground or short to power in harness or connectors.
4.CHECK COMPONENTS
Check the following.
- Camshaft position sensor (bank 2) ( P0340.)
- CKP sensor ( P0335.)
- Battery current sensor ( P1550.)
- EVAP control system pressure sensor ( P0451.)
- Refrigerant pressure sensor ( Testing and Inspection.)
Is the inspection result normal?
YES - GO TO 5.
NO - Replace malfunctioning component.
5.CHECK APP SENSOR
P2122.
Is the inspection result normal?
YES - GO TO 9.
NO - GO TO 6.
6.REPLACE ACCELERATOR PEDAL ASSEMBLY
Replace accelerator pedal assembly.
- INSPECTION END
7.CHECK BATTERY TEMPERATURE 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 - Repair open circuit, short to ground or short to power in harness or connectors.
8.CHECK BATTERY TEMPERATURE SENSOR
SEE Component Inspection (Battery Temperature Sensor).
Is the inspection result normal?
YES - GO TO 9.
NO - Replace battery negative cable assembly.
9.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
- INSPECTION END




Component Inspection (Battery Temperature Sensor)
1.CHECK BATTERY TEMPERATURE SENSOR
1. Turn ignition switch OFF.
2. Disconnect battery current sensor.
3. Check the resistance between battery current sensor connector terminals.





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