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

DESCRIPTION

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

WIRING DIAGRAM

Figure 1. for LHD:

A01VB3YE03

Figure 2. for RHD:

A01VB3YE04

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 power seat switch assembly.

      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 (POSITION CONTROL ECU AND SWITCH ASSEMBLY - BATTERY AND BODY GROUND)


    1. A01V9NNC16
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Position Control ECU and Switch Assembly)

      Disconnect the position control ECU and switch assembly connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      e18-2 (GND1) - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      d27-2 (GND1) - Body ground Always Below 1 Ω

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

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      e18-7 (+B1) - Body ground Always 11 to 14 V
      e6-3 (IG) - Body ground Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      for RHD
      Tester Connection Condition Specified Condition
      d27-7 (+B1) - Body ground Always 11 to 14 V
      d28-3 (IG) - Body ground Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR