Nissan Maxima Service and Repair Manual: Vehicle speed signal circuit

Description

Combination meter sends vehicle speed signal to power steering control unit.

Diagnosis Procedure

1.PERFORM COMBINATION METER SELF-DIAGNOSIS

Perform combination meter self-diagnosis.

2.CHECK HARNESS BETWEEN COMBINATION METER AND POWER STEERING CONTROL UNIT FOR OPEN

Nissan Maxima. CHECK HARNESS BETWEEN COMBINATION METER AND POWER STEERING CONTROL UNIT FOR OPEN

  1. Turn the ignition switch OFF.
  2. Disconnect combination meter connector.
  3. Disconnect power steering control unit connector.
  4. Check continuity between combination meter connector M24 (A)
    terminal 30 and power steering control unit connector M59 (B)
    terminal 8.

Nissan Maxima. CHECK HARNESS BETWEEN COMBINATION METER AND POWER STEERING CONTROL UNIT FOR OPEN

3.CHECK HARNESS BETWEEN COMBINATION METER AND POWER STEERING CONTROL UNIT FOR SHORT

Nissan Maxima. CHECK HARNESS BETWEEN COMBINATION METER AND POWER STEERING CONTROL UNIT FOR SHORT

Nissan Maxima. CHECK HARNESS BETWEEN COMBINATION METER AND POWER STEERING CONTROL UNIT FOR SHORT

  1. Check continuity between combination meter connector M24
    terminal 30 and ground.
  2. Turn ignition switch ON.
  3. Check voltage between combination meter connector M24 terminal
    30 and ground.

Nissan Maxima. CHECK HARNESS BETWEEN COMBINATION METER AND POWER STEERING CONTROL UNIT FOR SHORT

Nissan Maxima. CHECK HARNESS BETWEEN COMBINATION METER AND POWER STEERING CONTROL UNIT FOR SHORT

4.CHECK VEHICLE SPEED SIGNAL (COMBINATION METER SIDE)

  1. Turn the ignition switch OFF.
  2. Connect combination meter connector.
  3. Check combination meter input/output standard values.

5.CHECK VEHICLE SPEED SIGNAL (POWER STEERING CONTROL UNIT SIDE)

Nissan Maxima. HECK VEHICLE SPEED SIGNAL (POWER STEERING CONTROL UNIT SIDE)

  1. Turn the ignition switch OFF.
  2. Connect power steering control unit connector.
  3. Start the engine.
  4. Check signal between power steering control unit connector
    M59 terminal 8 and ground with oscillosco

Nissan Maxima. HECK VEHICLE SPEED SIGNAL (POWER STEERING CONTROL UNIT SIDE)

6.CHECK TERMINALS AND HARNESS CONNECTORS

  1. Check power steering control unit pin terminals for damage or loose connection with harness connector.
  2. Check combination meter pin terminals for damage or loose connection with harness connector.
    Engine speed signal circuit

    ECU diagnosis information