FRONT POWER SEAT CONTROL SYSTEM(w/ Memory) Front Power Seat does not Operate with Front Power Seat Switch

DESCRIPTION

Signals are input into the front power seat switch (driver seat). The built-in ECU manages the signals received from the power seat switch, and operates each motor. If the front power seat switch (driver seat) receives more than 2 motor operation signals, the motor is stopped. Manual operation is restarted after the front power seat switch (driver seat) receives 1 signal only.

WIRING DIAGRAM

A011NPGE04

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE


  1. CHECK FRONT POWER SEAT OPERATION


    1. Check that each function of the power seat operates normally by using the front power seat switch (driver seat).

      Click here

      Result
      Result Proceed to
      All power seat functions do not operate A
      One or more power seat functions do not operate B

    B

    GO TO OTHER DIAGNOSIS PROCEDURE (One or more Power Seat Motors do not Operate) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH (DRIVER SEAT) - POWER SUPPLY)


    1. Disconnect the b4*1 and b12*1 or a6*2 and a7*2 front power seat switch (driver seat) connectors.


      • *1: for LHD

      • *2: for RHD

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      b4-7 (+B) - Body ground Power switch off 11 to 14 V
      b12-3 (IG) - Body ground Power switch on (IG) 11 to 14 V
      b12-3 (IG) - Body ground Power switch off Below 1 V
      for RHD
      Tester Connection Condition Specified Condition
      a6-7 (+B) - Body ground Power switch off 11 to 14 V
      a7-3 (IG) - Body ground Power switch on (IG) 11 to 14 V
      a7-3 (IG) - Body ground Power switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH (DRIVER SEAT) - BODY GROUND)


    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      b4-2 (GND) - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      a6-2 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER SEAT SWITCH (DRIVER SEAT) Click here

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR