FRONT POWER SEAT CONTROL SYSTEM(w/ Memory) TERMINALS OF ECU


  1. CHECK FRONT POWER SEAT SWITCH (FOR DRIVER)


    1. for LHD:


      1. Disconnect the X9 and X10 front power seat switch (for driver) connectors.

        A0006SGE04

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

        Tech Tips

        Measure the values on the wire harness side with the connector disconnected.

        Terminal Connection Wiring Color Terminal Description Condition Specified Condition
        X9-2 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
        X9-7 (+B1) - X9-2 (GND1) R - W-B Power source Power switch off 11 to 14 V
        X10-12 (SYSB) - X9-2 (GND1) P - W-B System power source Power switch off 11 to 14 V
        X10-10 (DBCL) - Body ground GR - Body ground Driver seat belt buckle switch signal Driver seat belt fastened Below 1 Ω
        X10-10 (DBCL) - Body ground GR - Body ground Driver seat belt buckle switch signal Driver seat belt unfastened 10 kΩ or higher

        If the result is not as specified, there may be a malfunction on the wire harness side.

      3. Reconnect the X9 and X10 front power seat switch (for driver) connectors.

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

        Terminal Connection Wiring Color Terminal Description Condition Specified Condition
        X9-7 (+B1) - X9-2 (GND1) R - W-B Lumbar support adjuster power source Power switch off 11 to 14 V
        X9-2 (GND1) - Body ground W-B - Body ground Lumbar support adjuster ground Always Below 1 Ω
        X9-3 (SLD+) - X9-2 (GND1) L - W-B Slide motor signal (forward) Slide switch off Below 1 V
        Slide switch on (Forward) 11 to 14 V
        X9-4 (SLD-) - X9-2 (GND1) GR - W-B Slide motor signal (rearward) Slide switch off Below 1 V
        Slide switch on (Rearward) 11 to 14 V
        X9-5 (FRV-) - X9-2 (GND1) R - W-B Front vertical motor signal (downward) Front vertical switch off Below 1 V
        Front vertical switch on (Downward) 11 to 14 V
        X9-8 (FRV+) - X9-2 (GND1) B - W-B Front vertical motor signal (upward) Front vertical switch off Below 1 V
        Front vertical switch on (Upward) 11 to 14 V
        X9-9 (RCL+) - X9-2 (GND1) P - W-B Reclining motor signal (forward) Reclining switch off Below 1 V
        Reclining switch on (Forward) 11 to 14 V
        X9-11 (RCL-) - X9-2 (GND1) LG - W-B Reclining motor signal (rearward) Reclining switch off Below 1 V
        Reclining switch on (Rearward) 11 to 14 V
        X9-10 (LFT+) - X9-2 (GND1) V - W-B Lifter motor signal (upward) Lifter switch off Below 1 V
        Lifter switch on (Upward) 11 to 14 V
        X9-12 (LFT-) - X9-2 (GND1) G - W-B Lifter motor signal (downward) Lifter switch off Below 1 V
        Lifter switch on (Downward) 11 to 14 V
        X10-1 (SGND) - X9-2 (GND1) BR - W-B Position sensor round Always Below 1 Ω
        X10-3 (SSFV) - X10-1 (SGND) R - BR Front vertical position signal Front vertical function operating 4.5 to 4.8 V
        X10-4 (SSRL) - X10-1 (SGND) P - BR Lifter position signal Lifter function operating 4.5 to 4.8 V
        X10-5 (SSRS) - X10-1 (SGND) G- BR Slide position signal Slide function operating 4.5 to 4.8 V
        X10-11 (SSRR) - X10-1 (SGND) V - BR Reclining position signal Reclining function operating 4.5 to 4.8 V

        If the result is not as specified, the front power seat switch (for driver) may have a malfunction.

    2. for RHD:


      1. Disconnect the W9 and W10 front power seat switch (for driver) connectors.

        A0005HAE04

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

        Tech Tips

        Measure the values on the wire harness side with the connector disconnected.

        Terminal Connection Wiring Color Terminal Description Condition Specified Condition
        W9-2 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
        W9-7 (+B1) - W9-2 (GND1) R - W-B Power source Power switch off 11 to 14 V
        W10-12 (SYSB) - W9-2 (GND1) P - W-B System power source Power switch off 11 to 14 V
        W10-10 (DBCL) - Body ground GR - Body ground Driver seat belt buckle switch signal Driver seat belt fastened Below 1 Ω
        W10-10 (DBCL) - Body ground GR - Body ground Driver seat belt buckle switch signal Driver seat belt unfastened 10 kΩ or higher

        If the result is not as specified, there may be a malfunction on the wire harness side.

      3. Reconnect the W9 and W10 front power seat switch (for driver) connectors.

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

        Terminal Connection Wiring Color Terminal Description Condition Specified Condition
        W9-7 (+B1) - W9-2 (GND1) R - W-B Lumbar support adjuster power source Power switch off 11 to 14 V
        W9-2 (GND1) - Body ground W-B - Body ground Lumbar support adjuster ground Always Below 1 Ω
        W9-3 (SLD+) - W9-2 (GND1) L - W-B Slide motor signal (forward) Slide switch off Below 1 V
        Slide switch on (Forward) 11 to 14 V
        W9-4 (SLD-) - W9-2 (GND1) GR - W-B Slide motor signal (rearward) Slide switch off Below 1 V
        Slide switch on (Rearward) 11 to 14 V
        W9-5 (FRV-) - W9-2 (GND1) R - W-B Front vertical motor signal (downward) Front vertical switch off Below 1 V
        Front vertical switch on (Downward) 11 to 14 V
        W9-8 (FRV+) - W9-2 (GND1) B - W-B Front vertical motor signal (upward) Front vertical switch off Below 1 V
        Front vertical switch on (Upward) 11 to 14 V
        W9-9 (RCL+) - W9-2 (GND1) P - W-B Reclining motor signal (forward) Reclining switch off Below 1 V
        Reclining switch on (Forward) 11 to 14 V
        W9-11 (RCL-) - W9-2 (GND1) LG - W-B Reclining motor signal (rearward) Reclining switch off Below 1 V
        Reclining switch on (Rearward) 11 to 14 V
        W9-10 (LFT+) - W9-2 (GND1) V - W-B Lifter motor signal (upward) Lifter switch off Below 1 V
        Lifter switch on (Upward) 11 to 14 V
        W9-12 (LFT-) - W9-2 (GND1) G - W-B Lifter motor signal (downward) Lifter switch off Below 1 V
        Lifter switch on (Downward) 11 to 14 V
        W10-1 (SGND) - W9-2 (GND1) BR - W-B Position sensor round Always Below 1 Ω
        W10-3 (SSFV) - W10-1 (SGND) R - BR Front vertical position signal Front vertical function operating 4.5 to 4.8 V
        W10-4 (SSRL) - W10-1 (SGND) P - BR Lifter position signal Lifter function operating 4.5 to 4.8 V
        W10-5 (SSRS) - W10-1 (SGND) G- BR Slide position signal Slide function operating 4.5 to 4.8 V
        W10-11 (SSRR) - W10-1 (SGND) V - BR Reclining position signal Reclining function operating 4.5 to 4.8 V

        If the result is not as specified, the front power seat switch (for driver) may have a malfunction.

  2. CHECK FRONT POWER SEAT SWITCH (FOR FRONT PASSENGER)


    1. for LHD:


      1. Disconnect the W9 and W10 front power seat switch (for front passenger) connectors.

        A0005HAE04

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

        Tech Tips

        Measure the values on the wire harness side with the connector disconnected.

        Terminal Connection Wiring Color Terminal Description Condition Specified Condition
        W9-2 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
        W9-7 (+B) - W9-2 (GND) R - W-B Power source Power switch off 11 to 14 V
        W10-12 (SYSB) - W9-2 (GND) P - W-B System power source Power switch off 11 to 14 V

        If the result is not as specified, there may be a malfunction on the wire harness side.

      3. Reconnect the W9 and W10 front power seat switch (for front passenger) connectors.

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

        Terminal Connection Wiring Color Terminal Description Condition Specified Condition
        W9-7 (+B) - W9-2 (GND) R - W-B Lumbar support adjuster power source Power switch off 11 to 14 V
        W9-2 (GND) - Body ground W-B - Body ground Lumbar support adjuster ground Always Below 1 Ω
        W10-2 (SLDF) - W9-2 (GND)* L - W-B Power seat switch assembly signal Slide switch off Below 1 V
        Slide switch on (Forward) 11 to 14 V
        W10-6 (SLDR) - W9-2 (GND)* GR - W-B Power seat switch assembly signal Slide switch off Below 1 V
        Slide switch on (Rearward) 11 to 14 V
        W10-9 (RCLF) - W9-2 (GND)* P - W-B Power seat switch assembly signal Reclining switch off Below 1 V
        Reclining switch on (Forward) 11 to 14 V
        W10-10 (RCLR) - W9-2 (GND)* LG - W-B Power seat switch assembly signal Reclining switch off Below 1 V
        Reclining switch on (Rearward) 11 to 14 V
        W9-3 (SLD+) - W9-2 (GND) L - W-B Slide motor signal (forward) Slide switch off Below 1 V
        Slide switch on (Forward) 11 to 14 V
        W9-4 (SLD-) - W9-2 (GND) GR - W-B Slide motor signal (rearward) Slide switch off Below 1 V
        Slide switch on (Rearward) 11 to 14 V
        W9-5 (FRV-) - W9-2 (GND) R - W-B Front vertical motor signal (downward) Front vertical switch off Below 1 V
        Front vertical switch on (Downward) 11 to 14 V
        W9-8 (FRV+) - W9-2 (GND) B - W-B Front vertical motor signal (upward) Front vertical switch off Below 1 V
        Front vertical switch on (Upward) 11 to 14 V
        W9-9 (RCL+) - W9-2 (GND) P - W-B Reclining motor signal (forward) Reclining switch off Below 1 V
        Reclining switch on (Forward) 11 to 14 V
        W9-11 (RCL-) - W9-2 (GND) LG - W-B Reclining motor signal (rearward) Reclining switch off Below 1 V
        Reclining switch on (Rearward) 11 to 14 V
        W9-10 (LFT+) - W9-2 (GND) V - W-B Lifter motor signal (upward) Lifter switch off Below 1 V
        Lifter switch on (Upward) 11 to 14 V
        W9-12 (LFT-) - W9-2 (GND) G - W-B Lifter motor signal (downward) Lifter switch off Below 1 V
        Lifter switch on (Downward) 11 to 14 V
        W10-1 (SGND) - W9-2 (GND) BR - W-B Position sensor round Always Below 1 Ω
        W10-3 (SSFV) - W10-1 (SGND) R - BR Front vertical position signal Front vertical function operating 4.5 to 4.8 V
        W10-4 (SSRL) - W10-1 (SGND) P - BR Lifter position signal Lifter function operating 4.5 to 4.8 V
        W10-5 (SSRS) - W10-1 (SGND) G- BR Slide position signal Slide function operating 4.5 to 4.8 V
        W10-11 (SSRR) - W10-1 (SGND) V - BR Reclining position signal Reclining function operating 4.5 to 4.8 V

        • *: w/ Power Seat Switch Assembly

        If the result is not as specified, the front power seat switch (for front passenger) may have a malfunction.

    2. for RHD:


      1. Disconnect the X9 and X10 front power seat switch (for front passenger) connectors.

        A0006SGE04

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

        Tech Tips

        Measure the values on the wire harness side with the connector disconnected.

        Terminal Connection Wiring Color Terminal Description Condition Specified Condition
        X9-2 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
        X9-7 (+B) - X9-2 (GND) R - W-B Power source Always 11 to 14 V
        X10-12 (SYSB) - X9-2 (GND) P - W-B System power source Always 11 to 14 V

        If the result is not as specified, there may be a malfunction on the wire harness side.

      3. Reconnect the X9 and X10 front power seat switch (for front passenger) connectors.

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

        Terminal Connection Wiring Color Terminal Description Condition Specified Condition
        X9-7 (+B) - X9-2 (GND) R - W-B Lumbar support adjuster power source Always 11 to 14 V
        X9-2 (GND) - Body ground W-B - Body ground Lumbar support adjuster ground Always Below 1 Ω
        X9-3 (SLD+) - X9-2 (GND) L - W-B Slide motor signal (forward) Slide switch off Below 1 V
        Slide switch on (Forward) 11 to 14 V
        X9-4 (SLD-) - X9-2 (GND) GR - W-B Slide motor signal (rearward) Slide switch off Below 1 V
        Slide switch on (Rearward) 11 to 14 V
        X9-5 (FRV-) - X9-2 (GND) R - W-B Front vertical motor signal (downward) Front vertical switch off Below 1 V
        Front vertical switch on (Downward) 11 to 14 V
        X9-8 (FRV+) - X9-2 (GND) B - W-B Front vertical motor signal (upward) Front vertical switch off Below 1 V
        Front vertical switch on (Upward) 11 to 14 V
        X9-9 (RCL+) - X9-2 (GND) P - W-B Reclining motor signal (forward) Reclining switch off Below 1 V
        Reclining switch on (Forward) 11 to 14 V
        X9-11 (RCL-) - X9-2 (GND) LG - W-B Reclining motor signal (rearward) Reclining switch off Below 1 V
        Reclining switch on (Rearward) 11 to 14 V
        X9-10 (LFT+) - X9-2 (GND) V - W-B Lifter motor signal (upward) Lifter switch off Below 1 V
        Lifter switch on (Upward) 11 to 14 V
        X9-12 (LFT-) - X9-2 (GND) G - W-B Lifter motor signal (downward) Lifter switch off Below 1 V
        Lifter switch on (Downward) 11 to 14 V
        X10-1 (SGND) - X9-2 (GND) BR - W-B Position sensor round Always Below 1 Ω
        X10-3 (SSFV) - X10-1 (SGND) R - BR Front vertical position signal Front vertical function operating 4.5 to 4.8 V
        X10-4 (SSRL) - X10-1 (SGND) P - BR Lifter position signal Lifter function operating 4.5 to 4.8 V
        X10-5 (SSRS) - X10-1 (SGND) G- BR Slide position signal Slide function operating 4.5 to 4.8 V
        X10-11 (SSRR) - X10-1 (SGND) V - BR Reclining position signal Reclining function operating 4.5 to 4.8 V

        If the result is not as specified, the front power seat switch (for front passenger) may have a malfunction.

  3. CHECK OUTER MIRROR CONTROL ECU ASSEMBLY

    A000668E02
    Text in Illustration
    *A

    • for Driver (for LHD)

    • for Front Passenger (for RHD)

    		 *B

    • for Front Passenger (for LHD)

    • for Driver (for RHD)

    1. for Driver (for LHD) or Front Passenger (for RHD):


      1. Disconnect the M9 outer mirror control ECU assembly connector.

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

        Tech Tips

        Measure the values on the wire harness side with the connector disconnected.

        Tester Connection Wiring Color Terminal Description Condition Specified Condition
        M9-7 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
        M9-14 (BDR) - M9-7 (GND) GR - W-B Power source Power switch off 11 to 14 V
        M9-5 (SIG) - M9-7 (GND) BE - W-B Power source (IG) Power switch off Below 1 V
        Power switch on (IG) 11 to 14 V
        M9-6 (CPUB) - M9-7 (GND) W - W-B Power source Power switch off 11 to 14 V

        If the result is not as specified, there may be a malfunction in the wire harness.

      3. Reconnect the M9 outer mirror control ECU assembly connector.

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

        Tester Connection Wiring Color Terminal Description Condition Specified Condition
        M9-2 (M1) - M9-7 (GND) L - W-B M1 switch signal for seat memory switch M1 switch on Below 1 V
        M1 switch off 11 to 14 V
        M9-3 (M2) - M9-7 (GND) Y - W-B M2 switch signal for seat memory switch M2 switch on Below 1 V
        M2 switch off 11 to 14 V
        M9-4 (M3) - M9-7 (GND) GR - W-B M3 switch signal for seat memory switch M3 switch on Below 1 V
        M3 switch off 11 to 14 V
        M9-1 (MM) - M9-7 (GND) P - W-B SET switch signal for seat memory switch SET switch on Below 1 V
        SET switch off 11 to 14 V

        If the result is not as specified, the outer mirror control ECU assembly may have a malfunction.

    2. for Front Passenger (for LHD) or for Driver (for RHD):


      1. Disconnect the L10 outer mirror control ECU assembly connector.

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

        Tech Tips

        Measure the values on the wire harness side with the connector disconnected.

        Tester Connection Wiring Color Terminal Description Condition Specified Condition
        L10-7 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
        L10-14 (BDR) - L10-7 (GND) GR - W-B Power source Power switch off 11 to 14 V
        L10-5 (SIG) - L10-7 (GND) BE - W-B Power source (IG) Power switch off Below 1 V
        Power switch on (IG) 11 to 14 V
        L10-6 (CPUB) - L10-7 (GND) W - W-B Power source Power switch off 11 to 14 V

        If the result is not as specified, there may be a malfunction in the wire harness.

      3. Reconnect the L10 outer mirror control ECU assembly connector.

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

        Tester Connection Wiring Color Terminal Description Condition Specified Condition
        L10-2 (M1) - L10-7 (GND) L - W-B M1 switch signal for seat memory switch M1 switch on Below 1 V
        M1 switch off 11 to 14 V
        L10-3 (M2) - L10-7 (GND) Y - W-B M2 switch signal for seat memory switch M2 switch on Below 1 V
        M2 switch off 11 to 14 V
        L10-4 (M3) - L10-7 (GND) GR - W-B M3 switch signal for seat memory switch M3 switch on Below 1 V
        M3 switch off 11 to 14 V
        L10-1 (MM) - L10-7 (GND) P - W-B SET switch signal for seat memory switch SET switch on Below 1 V
        SET switch off 11 to 14 V

        If the result is not as specified, the outer mirror control ECU assembly may have a malfunction.

  4. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Disconnect the MB and H9 main body ECU (multiplex network body ECU) connectors.

      A0004XCE02
      Text in Illustration
      *A for LHD *B for RHD

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

      Tech Tips

      Measure the values on the wire harness side with the connector disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      MB-30 (BECU) - Body ground - Auxiliary battery power supply Power switch off 11 to 14 V
      MB-31 (ALTB) - Body ground - Auxiliary battery power supply Power switch off 11 to 14 V
      MB-32 (IG) - Body ground - Ignition power supply (IG signal) Power switch on (IG) → off 11 to 14 V → Below 1 V
      MB-29 (ACC) - Body ground - Ignition power supply (ACC signal) Power switch on (ACC) → off 11 to 14 V → Below 1 V
      MB-11 (GND1) - Body ground - Ground Always Below 1 Ω
      H9-3 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MB-2 (FLCY) - Body ground*1 - Front door courtesy light switch LH input Front door LH closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω
      MB-4 (FRCY) - Body ground*2 - Front door courtesy light switch RH input Front door RH closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω

      • *1: for LHD

      • *2: for RHD

      If the result is not as specified, there may be a malfunction in the wire harness.