P0643

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 SEE Diagnosis Procedure.
NO - INSPECTION END




Wiring Diagram









Diagnosis Procedure
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connections E15, E24. POWER SUPPLY AND GROUND CIRCUIT.
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) ( P0340.)
Is the inspection result normal?
YES - GO TO 5.
NO - Replace camshaft position sensor (PHASE). Exploded View.
5.CHECK TP SENSOR
P0122.
Is the inspection result normal?
YES - GO TO 9.
NO - GO TO 6.
6.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator. Exploded View.
2. Perform Special Repair Requirement.
- INSPECTION END
7.CHECK APP SENSOR
P2122.
Is the inspection result normal?
YES - GO TO 9.
NO - GO TO 8.
8.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly. Exploded View.
2. Perform P2122.
- INSPECTION END
9.CHECK INTERMITTENT INCIDENT
Trouble Diagnosis For Intermittent Incident.
- INSPECTION END