Nissan Altima 2007-2012 Service Manual: P0643 Sensor power supply

DTC Logic

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE


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 8V 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 EC-362, "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 GI-45, "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?


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?


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 (Refer to EC-380, "Component Inspection".) • Power steering pressure sensor (Refer to EC-355, "Component Inspection".) • Camshaft position sensor (PHASE) (Refer to EC-284, "Component Inspection".) Is the inspection result normal? YES >> GO TO 5.

NO >> Replace malfunctioning component.

5.CHECK TP SENSOR

Refer to EC-191, "Component Inspection".

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 EC-29, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Requirement".

>> INSPECTION END

7.CHECK APP SENSOR

Refer to EC-429, "Component Inspection".

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 EC-29, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Requirement".

>> INSPECTION END

9.CHECK INTERMITTENT INCIDENT

Refer to GI-42, "Intermittent Incident".

>> INSPECTION END

    P0607 ECM
    Description CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excelle ...

    P0850 PNP Switch
    Description When the shift lever position is P or N (CVT), Neutral position (M/T), park/neutral position (PNP) switch is ON. ECM detects the position because the continuity of the line (the ON s ...

    Other materials:

    B2601 shift position
    Description BCM confirms the shift position with the following 2 signals. • CVT selector lever • P position signal from IPDM E/R (CAN) DTC Logic DTC DETECTION LOGIC NOTE: • If DTC B2601 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer t ...

    Sound signal circuit (coupe)
    SATELLITE RADIO TUNER Description Left and right channel audio signals are supplied from the satellite radio tuner to the audio unit through the sound signal circuits. Diagnosis Procedure LEFT CHANNEL 1.CHECK HARNESS 1. Turn ignition switch OFF. 2. Disconnect satellite radio tuner (fac ...

    Camera image signal circuit (rear view camera to camera control unit)(coupe)
    Description Rear view camera images are transmitted to the rear view camera control unit using the camera image signal circuits. Diagnosis Procedure 1.CHECK CAMERA IMAGE SIGNAL CIRCUIT CONTINUITY 1. Turn ignition switch OFF. 2. Disconnect rear view camera control unit connector and rear v ...