CLIMATE CONTROL SEAT SYSTEM TERMINALS OF ECU


  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

    B002KYUN03

    1. Disconnect the I50 air conditioning amplifier assembly 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
      I50-1 (IG+) - Body ground SB - Body ground IG power supply Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      I50-14 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      I50-21 (B) - Body ground GR - Body ground Battery power supply Power switch off 11 to 14 V

    3. Reconnect the I50 air conditioning amplifier assembly connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      I50-37 (LIN1) - Body ground B - Body ground Climate control switch signal (LIN) Power switch on (IG) Pulse generation
      I54-10 (SVPB) - Body ground GR - Body ground Seat blower drive signal (for Front Passenger Side)

      • Power switch on (IG)

      • Climate control switch (for Front Passenger Side) on

      Pulse generation

      (See waveform)
      I54-11 (SVDB) - Body ground Y - Body ground Seat blower drive signal (for Driver Side)

      • Power switch on (IG)

      • Climate control switch (for Driver Side) on

      Pulse generation

      (See waveform)

      1. B002H5SN02

        Waveform (Reference):

        Measurement Condition
        Item Content
        Tester Connection I54-10 (SVPB) - Body ground
        Tool Setting 1 V/DIV., 1 ms/DIV.
        Vehicle Condition

        • Power switch on (IG)

        • Climate control switch on (for Front Passenger Side)
        Measurement Condition
        Item Content
        Tester Connection I54-11 (SVDB) - Body ground
        Tool Setting 1 V/DIV., 1 ms/DIV.
        Vehicle Condition

        • Power switch on (IG)

        • Climate control switch on (for Driver Side)

  2. AIR CONDITIONING CONTROL ASSEMBLY

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