FRONT POWER SEAT CONTROL SYSTEM (for LHD) Front Power Seat does not Operate with Front Power Seat Switch

DESCRIPTION

When a signal is input into the power seat switch assembly*1 or position control ECU assembly*2, *3 the ECU manages the signals received from the power seat switch, and operates each motor. If the power seat switch assembly*1 or position control ECU assembly*2, *3 receives more than 2 motor operation signals, the motor is stopped. Manual operation is restarted after the power seat switch assembly*1 or position control ECU assembly*2, *3 receives 1 signal only.


WIRING DIAGRAM


  1. for Driver Side (Standard Seat Type):

    A01FI2YE07

  2. for Driver Side (Sports Seat Type, Luxury Seat Type):

    A01FFVJE01

  3. for Front Passenger Seat Type (Luxury Seat Type):

    A01FFVJE02

INSPECTION PROCEDURE

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 power seat switch Click here.

      Result
      Result Proceed to
      All power seat functions does not operate (for Driver Side, Standard Seat Type) A
      All power seat functions does not operate (for Driver Side, Sports Seat Type, Luxury Seat Type) B
      All power seat functions does not operate (for Front Passenger Side, Luxury Seat Type) C
      One or more power seat functions does not operate D

    B

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - BATTERY AND BODY GROUND) Click here

    C

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - BATTERY AND BODY GROUND) Click here

    D

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

    A

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


    1. A01FDM4E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Power Seat Switch Assembly)

      Disconnect the d15 and d16 power seat switch assembly connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      d15-7 (+B) - Body ground Always 11 to 14 V
      d16-12 (SYSB) - Body ground Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      d15-2 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER SEAT SWITCH ASSEMBLY Click here

  3. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - BATTERY AND BODY GROUND)


    1. A01FDF5E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Position Control ECU Assembly)

      Disconnect the d4 and d5 position control ECU assembly connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      d4-2 (+B) - Body ground Always 11 to 14 V
      d4-1 (+B2) - Body ground Always 11 to 14 V
      d5-18 (SYSB) - Body ground Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      d5-1 (GND2) - Body ground Always Below 1 Ω
      d5-2 (GND) - Body ground Always Below 1 Ω
      Result
      Result Proceed to
      OK (for Sports Seat Type) A
      OK (for Luxury Seat Type) B
      NG C

    B

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

  4. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - BATTERY AND BODY GROUND)


    1. A01FDF5E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Position Control ECU Assembly)

      Disconnect the c2 and c3 position control ECU assembly connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      c3-2 (+B) - Body ground Always 11 to 14 V
      c3-1 (+B2) - Body ground Always 11 to 14 V
      c2-18 (SYSB) - Body ground Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      c2-1 (GND2) - Body ground Always Below 1 Ω
      c2-2 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here