HORN SYSTEM TERMINALS OF ECU


  1. CHECK FRONT LIGHT ECU (FRONT CONTROLLER)

    A01GN13E03

    1. Disconnect the A50 and A52 ECU connectors.

    2. Measure the resistance and voltage according to the value(s) in the table below.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      A52-5 (ALTB) - Body ground L - Body ground +B power supply Always 11 to 14 V
      A52-1 (BATB) - Body ground P - Body ground +B power supply Always 11 to 14 V
      A50-1 (FMB3) - Body ground LG - Body ground +B power supply Always 11 to 14 V
      A50-5 (FMIG) - Body ground Y - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      A50-2 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the A50 and A52 ECU connectors.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      B14-1 (HORL) - Body ground B - Body ground Horn (low pitched) signal Horn is sounding 11 to 14 V
      B14-2 (HORH) - Body ground B - Body ground Horn (high pitched) signal Horn is sounding 11 to 14 V

  2. CHECK STEERING PAD SWITCH ASSEMBLY

    A01GHZ0E03
    Text in Illustration
    *A w/ Transmission Shift Switch
    *B w/o Transmission Shift Switch

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      z15-12 - Body ground*1 W - Body ground +B power supply Always 11 to 14 V
      z7-12 - Body ground*2 R - Body ground +B power supply Always 11 to 14 V

      • *1: w/ Transmission Shift Switch

      • *2: w/o Transmission Shift Switch