P2138

P2138 APP SENSOR

DTC Logic


DTC DETECTION LOGIC

NOTE:
If DTC P2138 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
P0643.






DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
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 more than 8 V at idle.
- GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

1.Start engine and let it idle for 1 second.
2.Check DTC.
Is DTC detected?
YES- Proceed to .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK APP SENSOR 1 POWER SUPPLY

1.Turn ignition switch OFF.
2.Disconnect accelerator pedal position (APP) sensor harness connector.
3.Turn ignition switch ON.
4.Check the voltage between APP sensor harness connector and ground.





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

2. CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT

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





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

3. CHECK APP SENSOR 2 POWER SUPPLY

Check the voltage between APP sensor harness connector and ground.





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

4. CHECK SENSOR POWER SUPPLY CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check harness connector for short to power and short to ground, between the following terminals.










Is inspection result normal?
YES- Perform the trouble diagnosis for power supply circuit.
NO- Repair or replace error-detected parts.

5. CHECK APP SENSOR GROUND CIRCUIT

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





4.Also check harness for short to power.
Is the inspection result normal?
YES- GO TO 6.
NO- Repair or replace error-detected parts.

6. CHECK APP SENSOR INPUT SIGNAL CIRCUIT

1.Check the continuity between APP sensor harness connector and ECM harness connector.





2.Also check harness for short to ground and to power.
Is the inspection result normal?
YES- GO TO 7.
NO- Repair or replace error-detected parts

7. CHECK APP SENSOR

Check the APP sensor. .
Is the inspection result normal?
YES- Check intermittent incident. Intermittent Incident.
NO- Replace accelerator pedal assembly. Exploded View.


Component Inspection


1. CHECK ACCELERATOR PEDAL POSITION SENSOR

1.Turn ignition switch OFF.
2.Reconnect all harness connectors disconnected.
3.Turn ignition switch ON.
4.Check the voltage between ECM harness connector terminals as per the following condition.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace accelerator pedal assembly. Exploded View.