For California

P0643 SENSOR POWER SUPPLY

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

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- Go to .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK GROUND CONNECTION

1.Turn ignition switch OFF.
2.Check ground connection E38. Circuit Inspection.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace ground connection.

2. CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT

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





Is the inspection result normal?
YES- GO TO 7.
NO- GO TO 3.

3. CHECK SENSOR POWER SUPPLY CIRCUITS

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 (PHASE) (For California.)
Is the inspection result normal?
YES- GO TO 5.
NO- Replace camshaft position sensor (PHASE). Exploded View.

5. CHECK TP SENSOR

For California.
Is the inspection result normal?
YES- GO TO 9.
NO- GO TO 6.

6. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

Replace electric throttle control actuator. Exploded View.
- INSPECTION END

7. CHECK APP SENSOR

For California.
Is the inspection result normal?
YES- GO TO 9.
NO- GO TO 8.

8. REPLACE ACCELERATOR PEDAL ASSEMBLY

Replace accelerator pedal assembly. Removal And Installation.
- INSPECTION END

9. CHECK INTERMITTENT INCIDENT

Intermittent Incident.
- INSPECTION END