WINDOW DEFOGGER SYSTEM TERMINALS OF ECU


  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (for Automatic Air Conditioning System)

    A01VEZSE02

    1. Disconnect the F42 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
      F42-1 (IG+) - F42-14 (GND) V - W-B Ignition power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      F42-14 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      F42-21 (B) - F42-14 (GND) BE - W-B Battery power supply 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 air conditioning amplifier assembly connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F42-37 (LIN1) - F42-14 (GND) LG - W-B LIN communication signal Ignition switch ON Pulse generation
      F42-38 (RDFG) - F42-14 (GND) B - W-B DEF relay Ignition switch ON, rear window defogger switch OFF 11 to 14 V
      Ignition switch ON, rear window defogger switch ON Below 1 V

      • If the result is not as specified, the air conditioning amplifier assembly may have a malfunction.

  2. CHECK AIR CONDITIONING CONTROL ASSEMBLY (for Automatic Air Conditioning System)

    A01VIHLE02

    1. Disconnect the F40 air conditioning control 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
      F40-5 (IG+) - F40-8 (GND) V - BR Ignition power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      F40-8 (GND) - Body ground BR - 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 air conditioning control assembly connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F40-3 (LIN1) - F40-8 (GND) LG - BR LIN communication signal Ignition switch ON Pulse generation

      • If the result is not as specified, the air conditioning control assembly may have a malfunction.

  3. CHECK NO. 3 HEATER CONTROL SUB-ASSEMBLY (for Manual Air Conditioning System)

    A01VEI7E02

    1. Disconnect the F37 No. 3 heater control sub-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
      F37-1 (E) - Body ground BR - Body ground Ground Always Below 1 Ω
      F37-3 (IG+) - F37-1 (E) V - BR Ignition power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V

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

    3. Reconnect the No. 3 heater control sub-assembly connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F37-2 (RDEF) - F37-1 (E) B - BR Rear window defogger signal Ignition switch ON, rear window defogger switch OFF 11 to 14 V
      Ignition switch ON, rear window defogger switch ON Below 1 V

      • If the result is not as specified, the No. 3 heater control sub-assembly may have a malfunction.