POWER MIRROR CONTROL SYSTEM TERMINALS OF ECU


  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. Disconnect the E30 air conditioning amplifier assembly connector.

      A003U4WE63

    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.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      E30-1 (IG+) - E30-14 (GND) B - W-B Power source (IG) Power switch on (IG) 11 to 14 V
      E30-1 (IG+) - E30-14 (GND) B - W-B Power source (IG) Power switch off Below 1 V
      E30-21 (B) - E30-14 (GND) Y - W-B Battery power supply Power switch off 11 to 14 V
      E30-14 (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 E30 air conditioning amplifier assembly connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      E30-20 (RDFG) - E30-14 (GND) B - W-B Rear window defogger signal Power switch on (IG), rear window defogger switch off 11 to 14 V
      E30-20 (RDFG) - E30-14 (GND) B - W-B Rear window defogger signal Power switch on (IG), 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


    1. Disconnect the E76 air conditioning control assembly connector.

      A003RS6E02

    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.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      E76-2 (IG+) - E76-5 (GND) B - W-B Power source (IG) Power switch on (IG) 11 to 14 V
      E76-5 (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 E76 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
      E76-10 (LIN1) - E76-5 (GND) SB - W-B LIN communication line Power switch on (IG) Pulse generation

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