CLIMATE CONTROL SEAT SYSTEM TERMINALS OF ECU


  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

    B004C9HN03

    1. Disconnect the P58 air conditioning amplifier assembly 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
      P58-2 (IG+) - Body ground R - Body ground IG power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      P58-4 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the P58 air conditioning amplifier assembly connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      P58-23 (ROUT) - Body ground BE - Body ground Climate control blower control signal

      • Power switch on (IG)

      • Ventilation volume switch RH on

      Pulse generation

      (See waveform)
      P58-24 (LOUT) - Body ground R - Body ground Climate control blower control signal

      • Power switch on (IG)

      • Ventilation volume switch LH on

      Pulse generation

      (See waveform)

      1. B004BU4N02

        Waveform (Reference):

        Measurement Condition
        Item Content
        Tester Connection

        • P58-23 (ROUT) - Body ground

        • P58-24 (LOUT) - Body ground
        Tool Setting 1 V/DIV., 1 ms/DIV.
        Vehicle Condition

        • Power switch on (IG)

        • Ventilation volume switch on

  2. CHECK RADIO RECEIVER ASSEMBLY

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