WINDSHIELD DEICER SYSTEM TERMINALS OF ECU


  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. Disconnect the F50 and F51 air conditioning amplifier assembly connectors.

      A01NG4QE02

    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
      F50-1 (IG+) - F50-14 (GND) P - W-B Power source (IG) Power switch on (IG) 11 to 14 V
      F50-1 (IG+) - F50-14 (GND) P - W-B Power source (IG) Power switch off Below 1 V
      F50-21 (B) - F50-14 (GND) G - W-B Power source (Back-up) Always 11 to 14 V
      F51-18 (SW1) - F50-14 (GND)*1 B - W-B Wiper Deicer signal Power switch on (IG), Deicer switch on 11 to 14 V
      F51-18 (SW1) - F50-14 (GND)*1 B - W-B Wiper Deicer signal Power switch on (IG), Deicer switch off Below 1 V
      F50-14 (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.

      Tech Tips

      *1: w/o Navigation System.

    3. Reconnect the F50 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
      F50-40 (FDFE) - F50-14 (GND) P - W-B Wiper Deicer signal Power switch on (IG), Front wiper deicer switch off 11 to 14 V

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