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REAR POWER SEAT CONTROL SYSTEM Reclining Motor Circuit

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DTC Code DTC Name
  Reclining Motor Circuit
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DESCRIPTION

The fold seat control ECU receives switch operation signals from the No. 1 and No. 2 fold seat switches and rear power seat switch and activates the power seat motors. At this time, the Hall IC detects the actuation of the seatback and sends a seatback actuation signal to the fold seat control ECU. The fold seat control ECU uses signals from the Hall IC to detect if an object is caught or if any other abnormal condition has occurred.

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WIRING DIAGRAM

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INSPECTION PROCEDURE

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PROCEDURE


  1. Click here

    INSPECT NO. 3 SEATBACK FRAME SUB-ASSEMBLY (RECLINING MOTOR)


    1. A01DRIUE01

      for LH Side:


      1. Remove the No. 3 seatback frame sub-assembly LH (Click here).

      2. Check if the No. 3 seatback frame moves smoothly when the battery is connected to the reclining motor connector terminals.

    2. for RH Side:


      1. Remove the No. 3 seatback frame sub-assembly RH (Click here).

      2. Check if the No. 3 seatback frame moves smoothly when the battery is connected to the reclining motor connector terminals.

        OK
        Measurement Condition Specified Condition

        Battery positive (+) → 3 (FWD)

        Battery negative (-) → 4 (BACK)

        		 Forward

        Battery positive (+) → 4 (BACK)

        Battery negative (-) → 3 (FWD)

        		 Backward
        Table 1. Result
        Result Proceed to
        OK (for LH Side) A
        OK (for RH Side) B
        NG (for LH Side) C
        NG (for RH Side) D

  2. Click here

    CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - NO. 3 SEATBACK FRAME LH)


    1. Disconnect the d2 and d1 ECU connectors.

    2. Disconnect the d3 No. 3 seatback frame connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      d1-37 (SV2) - d3-5 (HLV) Always Below 1 Ω
      d1-37 (SV2) - Body ground Always 10 kΩ or higher
      d1-19 (SRCL) - d3-2 (HLS) Always Below 1 Ω
      d1-19 (SRCL) - Body ground Always 10 kΩ or higher
      d1-24 (SG2) - d3-6 (HLG) Always Below 1 Ω
      d1-24 (SG2) - Body ground Always 10 kΩ or higher
      d2-1 (RCL+) - d3-3 (FWD) Always Below 1 Ω
      d2-1 (RCL+) - Body ground Always 10 kΩ or higher
      d2-5 (RCL-) - d3-4 (BACK) Always Below 1 Ω
      d2-5 (RCL-) - Body ground Always 10 kΩ or higher

  3. Click here

    CHECK FOLD SEAT CONTROL ECU LH


    1. Remove the fold seat control ECU LH with its connectors still connected (Click here).

    2. A01DUBAE18

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      d1-37 (SV2) - d1-24 (SG2) Ignition switch off Below 1 V
      Ignition switch ON 5.5 to 8 V
      d1-19 (SRCL) - d1-24 (SG2) Motor is operating Pulse generation
      d2-1 (RCL+) - Body ground Rear power seat switch LH forward 11 to 14 V
      d2-5 (RCL-) - Body ground Rear power seat switch LH backward 11 to 14 V
      Table 2. Text in Illustration
      *a

      Component with harness connected

      (Fold Seat Control ECU LH)

  4. Click here

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

  5. Click here

    CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - NO. 3 SEATBACK FRAME RH)


    1. Disconnect the c2 and c1 ECU connectors.

    2. Disconnect the c3 No. 3 seatback frame connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      c1-37 (SV2) - c3-5 (HLV) Always Below 1 Ω
      c1-37 (SV2) - Body ground Always 10 kΩ or higher
      c1-19 (SRCL) - c3-2 (HLS) Always Below 1 Ω
      c1-19 (SRCL) - Body ground Always 10 kΩ or higher
      c1-24 (SG2) - c3-6 (HLG) Always Below 1 Ω
      c1-24 (SG2) - Body ground Always 10 kΩ or higher
      c2-1 (RCL+) - c3-3 (FWD) Always Below 1 Ω
      c2-1 (RCL+) - Body ground Always 10 kΩ or higher
      c2-5 (RCL-) - c3-4 (BACK) Always Below 1 Ω
      c2-5 (RCL-) - Body ground Always 10 kΩ or higher

  6. Click here

    CHECK FOLD SEAT CONTROL ECU RH


    1. Remove the fold seat control ECU RH with its connectors still connected (Click here).

    2. A01DUBAE21

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      c1-37 (SV2) - c1-24 (SG2) Ignition switch off Below 1 V
      Ignition switch ON 5.5 to 8 V
      c1-19 (SRCL) - c1-24 (SG2) Motor is operating Pulse generation
      c2-1 (RCL+) - Body ground Rear power seat switch RH forward 11 to 14 V
      c2-5 (RCL-) - Body ground Rear power seat switch RH backward 11 to 14 V
      Table 3. Text in Illustration
      *a

      Component with harness connected

      (Fold Seat Control ECU RH)

  7. Click here

    REPLACE NO. 3 SEATBACK FRAME SUB-ASSEMBLY LHClick here

  8. Click here

    REPLACE NO. 3 SEATBACK FRAME SUB-ASSEMBLY RHClick here

  9. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR