P0643

P0643 SENSOR POWER SUPPLY





DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following 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 8V at idle.
- GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON (READY).
2. Depress the accelerator pedal to start engine, then keep engine running for at least 1 second.
3. Check DTC.
Is DTC detected?
YES - Go to "Diagnosis Procedure".
NO - INSPECTION END




Diagnosis Procedure
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E9. Refer to Ground Inspection in Circuit Inspection.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace ground connection.
2.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 3.
NO - Repair short to ground or short to power in harness or connectors.
3.CHECK CAMSHAFT POSITION SENSOR (PHASE)
Refer to P0340.
Is the inspection result normal?
YES - GO TO 4.
NO - Replace malfunctioning component.
4.CHECK TP SENSOR
Refer to P0122.
Is the inspection result normal?
YES - GO TO 6.
NO - GO TO 5.
5.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator.
2. Go to "Special Repair Requirement"
- INSPECTION END
6.CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
- INSPECTION END




Special Repair Requirement
1.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Refer to Special Repair Requirement
- GO TO 2.
2.PERFORM IDLE AIR VOLUME LEARNING
Refer to Special Repair Requirement
- END