KEY REMINDER WARNING SYSTEM TERMINALS OF ECU


  1. CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

    A01X6GUE05

    1. Disconnect the 2A, 2B, 2D and E4 ECU connectors.

    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
      2B-20 (BATB) - Body ground L - Body ground Battery power supply Always 11 to 14 V
      2A-1 (ACC) - Body ground B - Body ground ACC power supply Ignition switch ACC 11 to 14 V
      2A-1 (ACC) - Body ground B - Body ground ACC power supply Ignition switch off Below 1 Ω
      2D-62 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E4-5 (KSW) - Body ground BR - Body ground Unlock warning switch input No key in ignition key cylinder 10 kΩ or higher
      E4-5 (KSW) - Body ground BR - Body ground Unlock warning switch input Key inserted in ignition key cylinder Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the 2A, 2B, 2D and E4 ECU connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      E1-24 (DCTY) - Body ground

      L*1 - Body ground

      Y*2 - Body ground

      		 Driver side door courtesy switch input Driver side door open Below 1 V
      E1-24 (DCTY) - Body ground

      L*1 - Body ground

      Y*2 - Body ground

      		 Driver side door courtesy switch input Ignition switch off, and driver side door courtesy switch off Pulse generation

      Tech Tips

      *1: for LHD

      *2: for RHD

      If the result is not as specified, the ECU may have a malfunction.