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 P0643.
NO - INSPECTION END
Wiring Diagram
EC-SEN/PW-01:
Diagnosis Procedure
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connections E15, E24. Ground 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) ( P0340.)
Is the inspection result normal?
YES - GO TO 5.
NO - Replace camshaft position sensor (PHASE).
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.
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.
2. Perform P2122.
- INSPECTION END
9.CHECK INTERMITTENT INCIDENT
Trouble Diagnosis For Intermittent Incident.
- INSPECTION END