P0643
P0643 SENSOR POWER SUPPLY
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 1 second.
2. Check DTC.
Is DTC detected?
YES - Proceed to SEE Diagnosis Procedure.
NO - INSPECTION END
Diagnosis Procedure
1.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 6.
NO - GO TO 2.
2.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 3.
NO - Repair short to ground or short to power in harness or connectors.
3.CHECK COMPONENTS
Check the following.
- Camshaft position sensor (bank 2) ( P0340.)
- Manifold absolute pressure sensor ( P0106.)
Is the inspection result normal?
YES - GO TO 4.
NO - Replace malfunctioning component.
4.CHECK THROTTLE POSITION SENSOR
P0222.
Is the inspection result normal?
YES - GO TO 8.
NO - GO TO 5.
5.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
Replace electric throttle control actuator. Removal And Installation.
- INSPECTION END
6.CHECK ACCELERATOR PEDAL POSITION SENSOR
P2122.
Is the inspection result normal?
YES - GO TO 8.
NO - GO TO 7.
7.REPLACE ACCELERATOR PEDAL ASSEMBLY
Replace accelerator pedal assembly. Removal And Installation Without Distance Control Assist System(Without distance control assist system). Removal And Installation With Distance Control Assist System (With distance control assist system).
- INSPECTION END
8.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
- INSPECTION END