Sensor Power Supply For California

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 Sensor Power Supply For California.
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 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.
- Battery current sensor ( Battery Current Sensor For California.)
- Power steering pressure sensor ( PSP Sensor For California.)
- Camshaft position sensor (PHASE) ( CMP Sensor (Phase) For California.)
Is the inspection result normal?
YES - GO TO 5.
NO - Replace malfunctioning component.
5.CHECK TP SENSOR
TP Sensor For California.
Is the inspection result normal?
YES - GO TO 9.
NO - GO TO 6.
6.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
Replace electric throttle control actuator. Service and Repair.
- INSPECTION END
7.CHECK APP SENSOR
APP Sensor For California.
Is the inspection result normal?
YES - GO TO 9.
NO - GO TO 8.
8.REPLACE ACCELERATOR PEDAL ASSEMBLY
Replace accelerator pedal assembly. Removal And Installation.
- INSPECTION END
9.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
- INSPECTION END