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

DESCRIPTION

When a signal is input into the front power seat switch LH*1, RH*2, the built-in ECU manages the signals received from the front power seat switch, and operates each motor. If the front power seat switch LH*1, RH*2 receives more than 2 motor operation signals for the same motor, the motor will be stopped. Manual operation is restarted when the front power seat switch LH*1, RH*2 receives 1 signal only.

*1: for LHD

*2: for RHD

WIRING DIAGRAM

B001WNZE20
for LHD
*a from Battery
*b P/SEAT F/L
*c MPX-B NO.1
*d Front Power Seat Switch LH
B001WNZE17
for RHD
*a from Battery
*b P/SEAT F/R
*c MPX-B NO.1
*d Front Power Seat Switch RH

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection 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 LH*1, RH*2 Click here.

      *1: for LHD

      *2: for RHD

      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 PROBLEM SYMPTOMS TABLE Click here

    A

  2. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - BATTERY AND BODY GROUND)


    1. Disconnect the c39*1, c46*2 and c40*1, c47*2 switch 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
      c39-6 (+B) - Body ground Always 11 to 14 V
      c40-12 (SYSB) - Body ground Always 11 to 14 V
      for RHD:
      Tester Connection Condition Specified Condition
      c46-6 (+B2) - Body ground Always 11 to 14 V
      c47-12 (SYSB) - Body ground Always 11 to 14 V

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

      Standard Resistance
      for LHD:
      Tester Connection Condition Specified Condition
      c39-1 (GND) - Body ground Always Below 1 Ω
      for RHD:
      Tester Connection Condition Specified Condition
      c46-1 (GND) - Body ground Always Below 1 Ω

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR