WINDOW DEFOGGER SYSTEM TERMINALS OF ECU


  1. CHECK HEATER CONTROL SUB-ASSEMBLY (for Manual Air Conditioning System)

    A002PMIE02

    1. Disconnect the H65 heater control 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
      H65-3 (IG+) - H65-5 (E) Y - W-B Power source (IG) Ignition switch ON 11 to 14 V
      H65-3 (IG+) - H65-5 (E) Ignition switch off Below 1 V
      H65-5 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the H65 heater control connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      H65-2 (RDEF) - H65-5 (E) B - W-B Rear defogger signal Ignition switch ON, rear window defogger switch off 11 to 14 V
      H65-2 (RDEF) - H65-5 (E) Ignition switch ON, rear window defogger switch on Below 1 V

      • If the result is not as specified, there may be a malfunction in the heater control.

  2. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

    A002OICE02

    1. Disconnect the H46 air conditioning amplifier 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
      H46-1 (IG+) - H46-14 (GND) Y - W-B Power source (IG) Ignition switch ON 11 to 14 V
      H46-1 (IG+) - H46-14 (GND) Ignition switch off Below 1 V
      H46-21 (B) - H46-14 (GND) W - W-B Power source (Back-up) Always 11 to 14 V
      H46-14 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the H46 air conditioning amplifier connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      H46-38 (RDFG) - H46-14 (GND) B - W-B Rear defogger signal Ignition switch ON, rear window defogger switch off 11 to 14 V
      H46-38 (RDFG) - H46-14 (GND) Ignition switch ON, rear window defogger switch on Below 1 V

      • If the result is not as specified, there may be a malfunction in the air conditioning amplifier.

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

    A002N2DE02

    1. Disconnect the H21 air conditioning control 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
      H21-2 (IG+) - H21-5 (GND) R - BR Power source (IG) Ignition switch ON 11 to 14 V
      H21-2 (IG+) - H21-5 (GND) Ignition switch off Below 1 V
      H21-5 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω

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

  4. CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    A002NDQE01

    1. Disconnect the DG main body ECU connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      DG-1 - Body ground W - Body ground Power source Always 11 to 14 V

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

    3. Reconnect the DG main body ECU connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      DQ-12 - Body ground B - Body ground DEF relay operation signal Ignition switch ON, rear window defogger switch off 11 to 14 V
      DQ-12 - Body ground Ignition switch ON, rear window defogger switch on Below 1 V
      DF-2 - Body ground B - Body ground Defogger wire operation signal Ignition switch ON, rear window defogger switch off Below 1 V
      DF-2 - Body ground Ignition switch ON, rear window defogger switch on 11 to 14 V

      • If the result is not as specified, there may be a malfunction in the main body ECU.