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 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




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 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 CIRCUIT
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) (Refer to P0340.)
- Battery current sensor (Refer to P1550.)
- Power steering pressure sensor (Refer to P0550.)
Is the inspection result normal?
YES - GO TO 5.
NO - Replace malfunctioning component.
5.CHECK TP SENSOR
Refer to 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. Go to P0122.
- INSPECTION END
7.CHECK APP SENSOR
Refer to 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. Go to P2122.
- INSPECTION END
9.CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
- INSPECTION END