KEY REMINDER WARNING SYSTEM TERMINALS OF ECU


  1. CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    A01IP5DE02

    1. Disconnect the DB, DE, DG and H80 ECU connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      DE-28 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      H80-4 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      DB-30 (BECU) - Body ground W - Body ground Power source Always 11 to 14 V
      DG-1 (ALTB) - Body ground W - Body ground
      DE-23 (KSW) - Body ground L - Body ground Unlock warning switch signal No key in ignition key cylinder 10 kΩ or higher
      Key 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 DB, DE, DG and H80 ECU connectors.

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

      for LHD
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      DA-21 (DCTY) - Body ground W - Body ground Front door courtesy light switch LH Driver side door closed 11 to 14 V
      Ignition switch off and front door courtesy light switch LH off Below 1 V
      for RHD
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      DC-6 (DCTY) - Body ground BR - Body ground Front door courtesy light switch RH Driver side door closed 11 to 14 V
      Ignition switch off and front door courtesy light switch RH off Below 1 V

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