Nissan Maxima Service and Repair Manual: P0643 sensor power supply

DTC Logic

DTC DETECTION LOGIC

Nissan Maxima. 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

2.PERFORM DTC CONFIRMATION PROCEDURE

  1. Turn ignition switch ON.
  2. Start engine and let it idle for 1 second.
  3. Check DTC

Diagnosis Procedure

1.CHECK GROUND CONNECTION

  1. Turn ignition switch OFF.
  2. Check ground connection E9.

2.CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT

Nissan Maxima. 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.

Nissan Maxima. CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT

3.CHECK SENSOR POWER SUPPLY CIRCUIT

Check harness for short to power and short to ground, between the following terminals.

Nissan Maxima. CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT

4.CHECK COMPONENTS

Check the following.

  • Camshaft position sensor (PHASE) (Refer to EC-302, "Component Inspection".)
  • EVT control position sensor (Refer to EC-402, "Component Inspection".)
  • Battery current sensor (Refer to EC-415, "Component Inspection".)
  • Power steering pressure sensor

5.CHECK TP SENSOR

6.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

  1. Replace electric throttle control actuator.

7.CHECK APP SENSOR

8.REPLACE ACCELERATOR PEDAL ASSEMBLY

  1. Replace accelerator pedal assembly.

9.CHECK INTERMITTENT INCIDENT

    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 selector lever position is P or N, park/neutral position (PNP) signal from the TCM is sent to ECM. DTC Logic DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1.INSPECTION ...

    Other materials:

    Manual operation
    Fan speed control Press the fan speed control buttons to manually control the fan speed. Press the AUTO button to return to automatic control of the fan speed. Air recirculation Press the  air recirculation button to recirculate interior air inside the vehicle. The indicator l ...

    Remove
    Use the following procedure to remove the head restraint/headrest: 1. Pull the head restraint/headrest up to the highest position. 2. Push and hold the lock knob. 3. Remove the head restraint/headrest from the seat. 4. Store the head restraint/headrest properly in a secure place so i ...

    Diagnosis system (bluetooth control unit)
    Diagnosis Description The Bluetooth control unit has two diagnostic checks. The first diagnostic check is performed automatically every ignition cycle during control unit initialization. The second diagnostic check is performed by the technician using the steering wheel audio control switches ...

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