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 procedure 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 10 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- Proceed to .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK GROUND CONNECTION

1.Turn ignition switch OFF.
2.Check ground connection M95. 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 (APP) SENSOR 1 POWER SUPPLY CIRCUIT

1.Disconnect 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.
- CMP sensor (bank 1) (P0340.)
- EVT control position sensor (bank 1) (P1078.)
- PSP sensor (P0550.)
Is the inspection result normal?
YES- GO TO 5.
NO- Replace malfunctioning component.

5. CHECK THROTTLE POSITION (TP) SENSOR

P0122.
Is the inspection result normal?
YES- GO TO 9.
NO- GO TO 6.

6. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

Replace electric throttle control actuator. Exploded View.
- 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

Replace accelerator pedal assembly. Without Distance Control Assist System (without distance control assist) or {LINK_TO_MANY:0000000007512473}{LINK_TO_MANY:0000000007512474}, "MODELS WITH DISTANCE
CONTROL ASSIST SYSTEM : Removal and Installation" (without distance control assist).
- INSPECTION END

9. CHECK INTERMITTENT INCIDENT

Perform Intermittent Incident.
- INSPECTION END