HEATED WINDSHIELD DEFROSTER SYSTEM TERMINALS OF ECU


  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

    B0059OMN20

    1. Disconnect the I50 air conditioning amplifier assembly 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
      I50-1 (IG+) - I50-14 (GND) SB - W-B IG power source Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      I50-21 (B) - I50-14 (GND) GR - W-B Battery power source Always 11 to 14 V
      I50-14 (GND) - Body ground W-B - Body ground Body ground Always Below 1 Ω

    3. Reconnect the I50 air conditioning amplifier assembly connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I50-39 (FDEF) - I50-14 (GND) L - W-B EHW NO. 1 relay signal Engine switch on (IG), No. 2 combination switch assembly (windshield deicer switch) off 11 to 14 V
      Engine switch on (IG), No. 2 combination switch assembly (windshield deicer switch) on Below 2.2 V
      I54-21 (DFAC) - I50-14 (GND) L - W-B No. 2 combination switch assembly (windshield deicer switch) input Engine switch on (IG), No. 2 combination switch assembly (windshield deicer switch) off Below 1 V
      Engine switch on (IG), No. 2 combination switch assembly (windshield deicer switch) on 11 to 14 V
      I50-23 (IND) - I50-14 (GND) R - W-B No. 2 combination switch assembly (windshield deicer switch) indicator output Engine switch on (IG), No. 2 combination switch assembly (windshield deicer switch) off 11 to 14 V
      Engine switch on (IG), No. 2 combination switch assembly (windshield deicer switch) on Below 1 V