REAR POWER SEAT CONTROL SYSTEM Park / Neutral Position Switch Circuit

DTC Code DTC Name
Park / Neutral Position Switch Circuit

DESCRIPTION

The fold seat control ECU receives signals from the park/neutral position switch and controls the seat folding and return operations. If the shift lever is in any position other than P when the engine switch is on (IG), the seat cannot be operated.

WIRING DIAGRAM

B239510E03

CAUTION / NOTICE / HINT

Tip:

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

PROCEDURE

  1. CHECK FOLD SEAT CONTROL ECU (PARK/NEUTRAL POSITION SWITCH SIGNAL)

    B243481C01

    *A

    for LH Side

    *B

    for RH Side

    *a

    Component with harness connected (Fold Seat Control ECU)

    1. Remove the fold seat control ECU with its connectors still connected.

      Click here

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

      Standard Voltage

      Table 1. for LH Side

      Tester Connection

      Condition

      Specified Condition

      d1-6 (P) - Body ground

      Engine switch on (ACC) or on (IG)Shift lever in P

      11 to 14 V

      Engine switch on (ACC) or on (IG)Shift lever not in P

      Below 1 V
      Table 2. for RH Side

      Tester Connection

      Condition

      Specified Condition

      c1-6 (P) - Body ground

      Engine switch on (ACC) or on (IG)Shift lever in P

      11 to 14 V

      Engine switch on (ACC) or on (IG)Shift lever not in P

      Below 1 V

    Result

    Result

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - BATTERY)

    C197711C03

    *a

    Front view of wire harness connector (to Park/Neutral Position Switch Assembly)

    1. Disconnect the C33 switch connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      C33-2 (RB) - Body ground

      Engine switch on (ACC) or on (IG)

      11 to 14 V

      Engine switch off

      Below 1 V

    Result

    Result

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

    C208647E07

    1. A750F:

      1. Remove the switch.

        Click here

    2. A760F:

      1. Remove the switch.

        Click here

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      2 (RB) - 6 (PL)

      Shift lever in P

      Below 1 Ω

      2 (RB) - 6 (PL)

      Shift lever not in P

      10 kΩ or higher

    Result

    Result

    Proceed to

    OK

    A

    NG (for A750F)

    B

    NG (for A760F)

    C
    B

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

    Click here

    C

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

    Click here

    A

  4. CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - PARK/NEUTRAL POSITION SWITCH)

    1. Disconnect the d1*1 or c1*2 ECU connector.

      *1: for LH Side

      *2: for RH Side

    2. Disconnect the C33 switch connector.

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

      Standard Resistance

      Table 3. for LH Side

      Tester Connection

      Condition

      Specified Condition

      d1-6 (P) - C33-6 (PL)

      Always

      Below 1 Ω

      d1-6 (P) - Body ground

      Always

      10 kΩ or higher
      Table 4. for RH Side

      Tester Connection

      Condition

      Specified Condition

      c1-6 (P) - C33-6 (PL)

      Always

      Below 1 Ω

      c1-6 (P) - Body ground

      Always

      10 kΩ or higher

    Result

    Result

    OK

    NG
    OK

    REPLACE FOLD SEAT CONTROL ECU

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR