For Mexico

P1550 BATTERY CURRENT SENSOR

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

1.Turn ignition switch OFF and wait at least 10 seconds.
2.Turn ignition switch ON.
3.Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:


Before performing the following procedure, confirm that battery voltage is 8 V or more at idle.
- GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

1.Start engine and let it idle for at least 10 seconds.
2.Check 1st trip DTC.
Is 1st trip DTC detected?
YES- Go to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. 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 8.
NO- GO TO 2.

2. 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 4.
NO- GO TO 3.

3. DETECT MALFUNCTIONING PART

Check the following.
- Harness for open between battery current sensor and ECM
- Loose or poor connection for each connector and harness
- Repair open circuit.

4. 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 5.
NO- Repair short to ground or short to power in harness or connectors.

5. CHECK COMPONENTS

Check the following.
- Crankshaft position sensor (Refer to "Component Inspection (Crankshaft Position Sensor)" For Mexico.)
- Camshaft position sensor (bank 1) (Refer to "Component Inspection (Camshaft Position Sensor)" For Mexico.)
- EVAP control system pressure sensor (Refer to "Component Function Check" For Mexico.)
- Refrigerant pressure sensor (Refer to "Component Function Check" For Mexico.)
Is the inspection result normal?
YES- GO TO 6.
NO- Replace malfunctioning component.

6. CHECK APP SENSOR

Refer to "Component Inspection (Accelerator Pedal Position Sensor)" For Mexico.
Is the inspection result normal?
YES- GO TO 13.
NO- GO TO 7.

7. REPLACE ACCELERATOR PEDAL ASSEMBLY

Replace accelerator pedal assembly. Refer to "MODELS WITHOUT DISTANCE CONTROL ASSIST SYSTEM : Removal and Installation" Without Distance Control Assist System


- INSPECTION END

8. 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 10.
NO- GO TO 9.

9. DETECT MALFUNCTIONING PART

Check the following.
- Harness for open or short between battery current sensor and ECM
- Loose or poor connection for each connector and harness
- Repair open circuit, short to ground or short to power in harness or connectors.

10. 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 12.
NO- GO TO 11.

11. DETECT MALFUNCTIONING PART

Check the following.
- Harness for open or short between battery current sensor and ECM
- Loose or poor connection for each connector and harness
- Repair open circuit, short to ground or short to power in harness or connectors.

12. CHECK BATTERY CURRENT SENSOR

Refer to "Component Inspection (Battery Current Sensor)" .
Is the inspection result normal?
YES- GO TO 13.
NO- Replace battery negative cable assembly.

13. CHECK INTERMITTENT INCIDENT

Refer to "Intermittent Incident" Intermittent Incident.
- INSPECTION END


Component Inspection (Battery Current Sensor)


1. CHECK BATTERY CURRENT SENSOR

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





3.Disconnect battery negative cable.





4.Install jumper cable between battery negative terminal and body ground.
5.Turn ignition switch ON.
6.Check the voltage between ECM harness connector terminals under the following conditions.





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