FRONT POWER SEAT CONTROL SYSTEM (w/ Memory), Diagnostic DTC:B2658

DTC Code DTC Name
B2658 Short in Sensor with Motor Power Supply Circuit

DESCRIPTION

This DTC is stored when a power seat motor operates (a position control sensor is being supplied with power) and the power supply voltage does not rise to the specified value.

DTC Code DTC Detection Condition Trouble Area
B2658 A problem with the voltage supplied to the position control sensor.

  • Position control ECU and switch assembly

  • Separate type front seat cushion spring assembly

  • Separate type front seat back spring assembly

  • Wire harness or connector

WIRING DIAGRAM

A003VWTE02

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC B2658 is not output.

    NG

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - SLIDE MOTOR) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  2. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - SLIDE MOTOR)


    1. Disconnect the X5*1 or W4*2 position control ECU and switch assembly connector.

    2. Disconnect the X1*1 or W1*2 slide motor connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      X5-5 (SSRS) - X1-2 Always Below 1 Ω
      X5-1 (SGND) - X1-3 Always Below 1 Ω
      X5-5 (SSRS) - X5-1 (SGND) Always 10 kΩ or higher
      X5-5 (SSRS) - Body ground Always 10 kΩ or higher
      X5-1 (SGND) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W4-5 (SSRS) - W1-2 Always Below 1 Ω
      W4-1 (SGND) - W1-3 Always Below 1 Ω
      W4-5 (SSRS) - W4-1 (SGND) Always 10 kΩ or higher
      W4-5 (SSRS) - Body ground Always 10 kΩ or higher
      W4-1 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (SLIDE MOTOR CIRCUIT)


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

      Standard Voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      X1-2 - X1-3 Sliding switch on 4.8 to 5.1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      W1-2 - W1-3 Sliding switch on 4.8 to 5.1 V

    NG

    REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH - FRONT VERTICAL MOTOR)


    1. Disconnect the X2*1 or W2*2 front vertical motor connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      X5-3 (SSFV) - X2-2 Always Below 1 Ω
      X5-1 (SGND) - X2-3 Always Below 1 Ω
      X5-3 (SSFV) - X5-1 (SGND) Always 10 kΩ or higher
      X5-3 (SSFV) - Body ground Always 10 kΩ or higher
      X5-1 (SGND) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W4-3 (SSFV) - W2-2 Always Below 1 Ω
      W4-1 (SGND) - W2-3 Always Below 1 Ω
      W4-3 (SSFV) - W4-1 (SGND) Always 10 kΩ or higher
      W4-3 (SSFV) - Body ground Always 10 kΩ or higher
      W4-1 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT VERTICAL MOTOR CIRCUIT)


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

      Standard Voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      X2-2 - X2-3 Front vertical switch on 4.8 to 5.1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      W2-2 - W2-3 Front vertical switch on 4.8 to 5.1 V

    NG

    REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - LIFTER MOTOR)


    1. Disconnect the X3*1 or W6*2 lifter motor connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      X5-4 (SSRL) - X3-2 Always Below 1 Ω
      X5-1 (SGND) - X3-3 Always Below 1 Ω
      X5-4 (SSRL) - X5-1 (SGND) Always 10 kΩ or higher
      X5-4 (SSRL) - Body ground Always 10 kΩ or higher
      X5-1 (SGND) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W4-4 (SSRL) - W6-2 Always Below 1 Ω
      W4-1 (SGND) - W6-3 Always Below 1 Ω
      W4-4 (SSRL) - W4-1 (SGND) Always 10 kΩ or higher
      W4-4 (SSRL) - Body ground Always 10 kΩ or higher
      W4-1 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (LIFTER MOTOR CIRCUIT)


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

      Standard Voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      X3-2 - X3-3 Lifter switch on 4.8 to 5.1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      W6-2 - W6-3 Lifter switch on 4.8 to 5.1 V

    NG

    REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY Click here

    OK

  8. REPLACE SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY


    1. Replace the separate type front seat cushion spring assembly Click here.

    2. Clear the DTCs Click here.

    3. Check for DTCs Click here.

      OK
      DTC B2658 is not output.

    NG

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - RECLINING MOTOR) Click here

    OK

    END (SEPARATE TYPE FRONT SEAT CUSHION SPRING WAS DEFECTIVE)

  9. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - RECLINING MOTOR)


    1. Disconnect the X5*1 or W4*2 position control ECU and switch assembly connector.

    2. Disconnect the Z1*1 or Y1*2 reclining motor connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      X5-11 (SSRR) - Z1-2 Always Below 1 Ω
      X5-1 (SGND) - Z1-3 Always Below 1 Ω
      X5-11 (SSRR) - X5-1 (SGND) Always 10 kΩ or higher
      X5-11 (SSRR) - Body ground Always 10 kΩ or higher
      X5-1 (SGND) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W4-11 (SSRR) - Y1-2 Always Below 1 Ω
      W4-1 (SGND) - Y1-3 Always Below 1 Ω
      W4-11 (SSRR) - W4-1 (SGND) Always 10 kΩ or higher
      W4-11 (SSRR) - Body ground Always 10 kΩ or higher
      W4-1 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (RECLINING MOTOR CIRCUIT)


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

      Standard Voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      Z1-2 - Z1-3 Reclining switch on 4.8 to 5.1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      Y1-2 - Y1-3 Reclining switch on 4.8 to 5.1 V

    NG

    REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY Click here

    OK

  11. REPLACE SEPARATE TYPE FRONT SEAT BACK SPRING ASSEMBLY


    1. Replace the separate type front seat back spring assembly Click here.

    2. Clear the DTCs Click here.

    3. Check for DTCs Click here.

      OK
      DTC B2658 is not output.

    NG

    REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY Click here

    OK

    END (SEPARATE TYPE FRONT SEAT BACK SPRING ASSEMBLY WAS DEFECTIVE)