WINDOW DEFOGGER SYSTEM TERMINALS OF ECU


  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

    A01FMYTN28

    1. Disconnect the O9 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
      O9-5 (IG+) - O9-1 (GND) R - BR Power source (IG) Engine switch on (IG) 11 to 14 V
      O9-5 (IG+) - O9-1 (GND) R - BR Power source (IG) Engine switch off Below 1 V
      O9-6 (+B1) - O9-1 (GND) L - BR Battery power supply Always 11 to 14 V
      O9-1 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω

    3. Reconnect the O9 air conditioning amplifier assembly connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      O9-25 (RDEF) - O9-1 (GND) G - BR Rear window defogger signal Engine switch on (IG), rear window defogger switch off 11 to 14 V
      O9-25 (RDEF) - O9-1 (GND) G - BR Rear window defogger signal Engine switch on (IG), rear window defogger switch on Below 2.2 V
      O9-21 (RLIN) - O9-1 (GND) P - BR LIN communication line Engine switch on (IG) Pulse generation

  2. CHECK AIR CONDITIONING CONTROL ASSEMBLY

    A01FKCON28

    1. Disconnect the O64 air conditioning control 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
      O64-8 (IG+) - O64-14 (GND) G - W-B Power source (IG) Engine switch on (IG) 11 to 14 V
      O64-8 (IG+) - O64-14 (GND) G - W-B Power source (IG) Engine switch off Below 1 V
      O64-14 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the O64 air conditioning control 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
      O64-6 (LIN1) - O64-14 (GND) P - W-B LIN communication line Engine switch on (IG) Pulse generation