SEAT HEATER SYSTEM TERMINALS OF ECU


  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

    A01Q9I9E03

    1. Disconnect the K64 air conditioning amplifier 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.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      K64-5 (IG+) - Body ground B - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      K64-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the K64 air conditioning amplifier assembly connector.

    4. Measure the voltage and check for pulse generation according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      K64-15 (SHP+) - K64-1 (GND) W - W-B Refreshing seat switch volume signal

      • Engine switch on (IG)

      • Refreshing seat switch on (LO)

        (heater position)

      		 Below 1 V
      K64-16 (SHD+) -K64-1 (GND) G - W-B Refreshing seat switch volume signal

      • Engine switch on (IG)

      • Refreshing seat switch on (LO)

        (heater position)

      		 Below 1 V
      K64-20 (LIN1) - Body ground L - Body ground Refreshing seat switch signal Engine switch on (IG) Pulse generation
      K64-21 (RLIN) - Body ground* P - Body ground LIN communication signal Engine switch on (IG) Pulse generation

      *: w/ Rear Seat Heater

  2. CHECK REFRESHING SEAT SWITCH

    A01Q8MLE01

    1. Disconnect the K59 refreshing seat switch 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.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      K59-1 (IG) - Body ground W - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      K59-4 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the K59 refreshing seat switch connector.

    4. Check for pulse according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      K59-7 (SW) - Body ground L - Body ground Refreshing seat switch signal Engine switch on (IG) Pulse generation

  3. CHECK REAR CONTROL SWITCH (w/ Rear Seat Heater)

    A01QAT4E01

    1. Disconnect the e1 rear control switch connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      e1-1 (+B) - Body ground R - Body ground Power source (Back-up) Always 11 to 14 V
      e1-7 (IG+) - Body ground L - Body ground Power source (IG) Engine switch on (IG) 11 to 14 V
      e1-5 (E) - Body ground W-B - Body ground Ground Always Below 1 V

    3. Reconnect the e1 rear control switch connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      e1-9 (RLIN) - e1-5 (E) P - W-B LIN communication signal Engine switch on (IG) Pulse generation