HEATED WINDSHIELD DEFROSTER SYSTEM TERMINALS OF ECU


  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

    B002KYUN20

    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 Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      I50-21 (B) - I50-14 (GND) GR - W-B Auxiliary battery power source Power switch off 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 Power switch on (IG), No. 2 combination switch assembly (windshield deicer switch) off 11 to 14 V
      Power 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 Power switch on (IG), No. 2 combination switch assembly (windshield deicer switch) off Below 1 V
      Power 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 Power switch on (IG), No. 2 combination switch assembly (windshield deicer switch) off 11 to 14 V
      Power switch on (IG), No. 2 combination switch assembly (windshield deicer switch) on Below 1 V