WINDOW DEFOGGER SYSTEM TERMINALS OF ECU

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

    1. Disconnect the E28 air conditioning amplifier assembly connector.

      E238082N11

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

      Tip:

      Measure the values on the wire harness side with the connector disconnected.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      E28-1 (IG+) - E28-14 (GND)

      L - BR

      Power source (IG)

      Ignition switch ON

      11 to 14 V

      E28-1 (IG+) - E28-14 (GND)

      L - BR

      Power source (IG)

      Ignition switch off

      Below 1 V

      E28-21 (B) - E28-14 (GND)

      W - BR

      Battery power supply

      Always

      11 to 14 V

      E28-14 (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.

    3. Reconnect the E28 air conditioning amplifier assembly connector.

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

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      E28-38 (RDFG) - E28-14 (GND)

      V - BR

      Rear window defogger signal

      Ignition switch ON, rear window defogger switch off

      11 to 14 V

      E28-38 (RDFG) - E28-14 (GND)

      V - BR

      Rear window defogger signal

      Ignition switch ON, rear window defogger switch on

      Below 1 V

      E28-37 (LIN1) - E28-14 (GND)

      SB - BR

      LIN communication line

      Ignition switch ON

      Pulse generation

      If the result is not as specified, the air conditioning amplifier assembly may be malfunctioning.

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

    1. Disconnect the E130 air conditioning control assembly connector.

      E238083N35

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

      Tip:

      Measure the values on the wire harness side with the connector disconnected.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      E130-8 (IG+) - E130-1 (GND)

      B - W-B

      Power source (IG)

      Ignition switch ON

      11 to 14 V

      E130-8 (IG+) - E130-1 (GND)

      B - W-B

      Power source (IG)

      Ignition switch off

      Below 1 V

      E130-1 (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 E130 air conditioning control assembly connector.

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

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      E130-6 (LIN1) - E130-1 (GND)

      SB - W-B

      LIN communication line

      Ignition switch ON

      Pulse generation

      If the result is not as specified, the air conditioning control assembly may be malfunctioning.