Nissan Maxima Service and Repair Manual: Lifting sensor (front)

Nissan Maxima Service and Repair Manual / Body interior / Automatic drive positioner / DTC/circuit diagnosis / Lifting sensor (front)

Description

  • The lifting sensor (front) is installed to the seat frame.
  • The pulse signal is input to the driver seat control unit when the lifting (front) is operated.
  • The driver seat control unit counts the pulse and calculates the lifting (front) amount of the seat.

Component Function Check

1.CHECK FUNCTION

  1. Select "LIFT FR PULSE" in "DATA MONITOR" mode with CONSULT.
  2. Check the lifting sensor (front) signal under the following conditions.

Nissan Maxima. .CHECK FUNCTION

Diagnosis Procedure

1. CHECK LIFTING SENSOR (FRONT) SIGNAL

  1. Turn ignition switch ON.
  2. Read the voltage signal between driver seat control unit harness connector and ground with an oscilloscope.

Nissan Maxima. CHECK LIFTING SENSOR (FRONT) SIGNAL

2. CHECK LIFTING SENSOR (FRONT) CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect driver seat control unit and front power seat LH [lifting motor (front)].
  3. Check continuity between driver seat control unit harness connector and front power seat LH [lifting motor (front)] harness connector.

Nissan Maxima. CHECK LIFTING SENSOR (FRONT) CIRCUIT

  1. Check continuity between driver seat control unit harness connector and ground.

Nissan Maxima. CHECK LIFTING SENSOR (FRONT) CIRCUIT

3. CHECK LIFTING SENSOR (FRONT) POWER SUPPLY

  1. Connect driver seat control unit.
  2. Turn ignition switch ON.
  3. Check voltage between front power seat LH [lifting motor (front)] harness connector and ground.

Nissan Maxima. CHECK LIFTING SENSOR (FRONT) POWER SUPPLY

4. CHECK LIFTING SENSOR (FRONT) POWER SUPPLY CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect driver seat control unit.
  3. 3. Check continuity between driver seat control unit harness connector and front power seat LH [lifting motor (front)] harness connector.

Nissan Maxima. CHECK LIFTING SENSOR (FRONT) POWER SUPPLY CIRCUIT

  1. Check continuity between driver seat control unit harness connector and ground.

Nissan Maxima. CHECK LIFTING SENSOR (FRONT) POWER SUPPLY CIRCUIT

5. CHECK LIFTING SENSOR (FRONT) GROUND

Nissan Maxima. CHECK LIFTING SENSOR (FRONT) GROUND

  1. Turn ignition switch OFF.
  2. Check continuity between front power seat LH [lifting motor (front)] harness connector and ground.

Nissan Maxima. CHECK LIFTING SENSOR (FRONT) GROUND

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