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:

    Inspection and adjustment
    Preliminary Check 1. FOREIGN OBJECTS Check the following: objects on or behind the seats that could cause binding objects under the seats that may be interfering with the seat's moving parts objects under pedals that may interfere with movement Are there any foreign objects that coul ...

    Precaution
    PRECAUTIONS Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and fron ...

    VDC off indicator lamp
    Description Component Function Check 1.VDC OFF INDICATOR LAMP OPERATION CHECK 1 Check that the lamp illuminates for approximately 2 seconds after the ignition switch is turned ON. 2.VDC OFF INDICATOR LAMP OPERATION CHECK 2 Check that the VDC OFF indicator lamp in the combination meter tur ...

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