WINDSHIELD DEICER SYSTEM TERMINALS OF ECU


  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. Disconnect the H54 air conditioning amplifier assembly connector.

      A00094VE07

    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
      H54-1 (IG+) - H54-14 (GND) V - W-B Power source (IG) Power switch on (IG) 11 to 14 V
      H54-1 (IG+) - H54-14 (GND) V - W-B Power source (IG) Power switch off Below 1 V
      H54-21 (B) - H54-14 (GND) GR - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      H54-14 (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 H54 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
      H54-39 (FDEF) - H54-14 (GND) W - W-B Wiper Deicer signal Power switch on (IG), Front wiper deicer switch off 11 to 14 V
      H54-39 (FDEF) - H54-14 (GND) W - W-B Wiper Deicer signal Power switch on (IG), Front wiper deicer switch on Below 2.2 V

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