FRONT POWER SEAT CONTROL SYSTEM TERMINALS OF ECU


  1. INSPECT FRONT POWER SEAT SWITCH LH (POSITION CONTROL ECU)

    A0161SME10

    1. Disconnect the U7 and U6 ECU connectors.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      U7-4 (IG) - U6-1 (GND) Y - W-B Engine switch signal Engine switch off Below 1 V
      U7-4 (IG) - U6-1 (GND) Y - W-B Engine switch signal Engine switch on (IG) 11 to 14 V
      U6-5 (+B) - U6-1 (GND) L - W-B Power source Always 11 to 14 V
      U7-8 (SYSB) - U6-1 (GND) LG - W-B System power source Always 11 to 14 V
      U6-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the U7 and U6 ECU connectors.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      U6-2 (SLD+) - U6-1 (GND) B - W-B Sliding motor signal (forward) Slide switch OFF Below 1 V
      U6-2 (SLD+) - U6-1 (GND) B - W-B Sliding motor signal (forward) Slide switch FRONT ON 11 to 14 V
      U6-3 (SLD-) - U6-1 (GND) G - W-B Sliding motor signal (rearward) Slide switch OFF Below 1 V
      U6-3 (SLD-) - U6-1 (GND) G - W-B Sliding motor signal (rearward) Slide switch REAR ON 11 to 14 V
      U6-6 (FRV+) - U6-1 (GND) W - W-B Front vertical motor signal (upward) Front vertical switch OFF Below 1 V
      U6-6 (FRV+) - U6-1 (GND) W - W-B Front vertical motor signal (upward) Front vertical switch UP ON 11 to 14 V
      U6-4 (FRV-) - U6-1 (GND) R - W-B Front vertical motor signal (downward) Front vertical switch OFF Below 1 V
      U6-4 (FRV-) - U6-1 (GND) R - W-B Front vertical motor signal (downward) Front vertical switch DOWN ON 11 to 14 V
      U6-7 (LFT+) - U6-1 (GND) Y - W-B Lifter motor signal (upward) Lifter switch OFF Below 1 V
      U6-7 (LFT+) - U6-1 (GND) Y - W-B Lifter motor signal (upward) Lifter switch UP ON 11 to 14 V
      U6-9 (LFT-) - U6-1 (GND) LG - W-B Lifter motor signal (downward) Lifter switch OFF Below 1 V
      U6-9 (LFT-) - U6-1 (GND) LG - W-B Lifter motor signal (downward) Lifter switch DOWN ON 11 to 14 V
      U6-8 (RCL+) - U6-1 (GND) BR - W-B Reclining motor signal (forward) Reclining switch OFF Below 1 V
      U6-8 (RCL+) - U6-1 (GND) BR - W-B Reclining motor signal (forward) Reclining switch FRONT ON 11 to 14 V
      U6-10 (RCL-) - U6-1 (GND) GR - W-B Reclining motor signal (rearward) Reclining switch OFF Below 1 V
      U6-10 (RCL-) - U6-1 (GND) GR - W-B Reclining motor signal (rearward) Reclining switch REAR ON 11 to 14 V

      If the result is not as specified, the front power seat switch LH (position control ECU) may have a malfunction.

  2. INSPECT FRONT POWER SEAT SWITCH RH (POSITION CONTROL ECU)

    A0161SME11

    1. Disconnect the T6 and T7 ECU connectors.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      T7-4 (IG) - T6-1 (GND) B - W-B Engine switch signal Engine switch off Below 1 V
      T7-4 (IG) - T6-1 (GND) B - W-B Engine switch signal Engine switch on (IG) 11 to 14 V
      T6-5 (+B) - T6-1 (GND) L - W-B Power source Always 11 to 14 V
      T7-8 (SYSB) - T6-1 (GND) P - W-B System power source Always 11 to 14 V
      T6-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the T6 and T7 ECU connectors.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      T6-2 (SLD+) - T6-1 (GND) B - W-B Sliding motor signal (forward) Slide switch OFF Below 1 V
      T6-2 (SLD+) - T6-1 (GND) B - W-B Sliding motor signal (forward) Slide switch FRONT ON 11 to 14 V
      T6-3 (SLD-) - T6-1 (GND) G - W-B Sliding motor signal (rearward) Slide switch OFF Below 1 V
      T6-3 (SLD-) - T6-1 (GND) G - W-B Sliding motor signal (rearward) Slide switch REAR ON 11 to 14 V
      T6-6 (FRV+) - T6-1 (GND) W - W-B Front vertical motor signal (upward) Front vertical switch OFF Below 1 V
      T6-6 (FRV+) - T6-1 (GND) W - W-B Front vertical motor signal (upward) Front vertical switch UP ON 11 to 14 V
      T6-4 (FRV-) - T6-1 (GND) R - W-B Front vertical motor signal (downward) Front vertical switch OFF Below 1 V
      T6-4 (FRV-) - T6-1 (GND) R - W-B Front vertical motor signal (downward) Front vertical switch DOWN ON 11 to 14 V
      T6-7 (LFT+) - T6-1 (GND) Y - W-B Lifter motor signal (upward) Lifter switch OFF Below 1 V
      T6-7 (LFT+) - T6-1 (GND) Y - W-B Lifter motor signal (upward) Lifter switch UP ON 11 to 14 V
      T6-9 (LFT-) - T6-1 (GND) LG - W-B Lifter motor signal (downward) Lifter switch OFF Below 1 V
      T6-9 (LFT-) - T6-1 (GND) LG - W-B Lifter motor signal (downward) Lifter switch DOWN ON 11 to 14 V
      T6-8 (RCL+) - T6-1 (GND) BR - W-B Reclining motor signal (forward) Reclining switch OFF Below 1 V
      T6-8 (RCL+) - T6-1 (GND) BR - W-B Reclining motor signal (forward) Reclining switch FRONT ON 11 to 14 V
      T6-10 (RCL-) - T6-1 (GND) GR - W-B Reclining motor signal (rearward) Reclining switch OFF Below 1 V
      T6-10 (RCL-) - T6-1 (GND) GR - W-B Reclining motor signal (rearward) Reclining switch REAR ON 11 to 14 V

      If the result is not as specified, the front power seat switch RH (position control ECU) may have a malfunction.

  3. CHECK OUTER MIRROR CONTROL ECU LH

    A015ZTEE13

    1. Disconnect the M10 ECU connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      M10-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      M10-4 (CPUB) - M10-1 (GND) G - W-B Battery (ECU power source) Always 11 to 14 V
      M10-3 (SIG) - M10-1 (GND) B - W-B Engine switch (IG) power supply Engine switch off Below 1 V
      M10-3 (SIG) - M10-1 (GND) B - W-B Engine switch (IG) power supply Engine switch on (IG) 11 to 14 V
      M10-6 (BDR) - M10-1 (GND) L - W-B Battery (ECU 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 M10 ECU connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      M10-26 (MSWE) - M10-1 (GND) O - W-B Ground for seat memory switch Always Below 1 Ω
      M10-25 (MM) - M10-26 (MSWE) W - O SET switch signal SET switch OFF 11 to 14 V
      M10-25 (MM) - M10-26 (MSWE) W - O SET switch signal SET switch ON Below 1 V
      M10-22 (M1) - M10-26 (MSWE) LG - O M1 switch signal M1 switch OFF 11 to 14 V
      M10-22 (M1) - M10-26 (MSWE) LG - O M1 switch signal M1 switch ON Below 1 V
      M10-23 (M2) - M10-26 (MSWE) R - O M2 switch signal M2 switch OFF 11 to 14 V
      M10-23 (M2) - M10-26 (MSWE) R - O M2 switch signal M2 switch ON Below 1 V
      M10-24 (M3) - M10-26 (MSWE) Y - O M3 switch signal M3 switch OFF 11 to 14 V
      M10-24 (M3) - M10-26 (MSWE) Y - O M3 switch signal M3 switch ON Below 1 V

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

  4. CHECK OUTER MIRROR CONTROL ECU RH

    A015ZTEE14

    1. Disconnect the L10 ECU connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L10-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L10-4 (CPUB) - L10-1 (GND) G - W-B Battery (ECU power source) Always 11 to 14 V
      L10-3 (SIG) - L10-1 (GND) B - W-B Engine switch (IG) power supply Engine switch off Below 1 V
      L10-3 (SIG) - L10-1 (GND) B - W-B Engine switch (IG) power supply Engine switch on (IG) 11 to 14 V
      L10-6 (BDR) - L10-1 (GND) L - W-B Battery (ECU 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 L10 ECU connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L10-26 (MSWE) - L10-1 (GND) W - W-B Ground for seat memory switch Always Below 1 Ω
      L10-25 (MM) - L10-26 (MSWE) Y - W SET switch signal SET switch OFF 11 to 14 V
      L10-25 (MM) - L10-26 (MSWE) Y - W SET switch signal SET switch ON Below 1 V
      L10-22 (M1) - L10-26 (MSWE) O - W M1 switch signal M1 switch OFF 11 to 14 V
      L10-22 (M1) - L10-26 (MSWE) O - W M1 switch signal M1 switch ON Below 1 V
      L10-23 (M2) - L10-26 (MSWE) LG - W M2 switch signal M2 switch OFF 11 to 14 V
      L10-23 (M2) - L10-26 (MSWE) LG - W M2 switch signal M2 switch ON Below 1 V
      L10-24 (M3) - L10-26 (MSWE) R - W M3 switch signal M3 switch OFF 11 to 14 V
      L10-24 (M3) - L10-26 (MSWE) R - W M3 switch signal M3 switch ON Below 1 V

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