KEY REMINDER WARNING SYSTEM TERMINALS OF ECU


  1. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    A0099Y4E06
    Text in Illustration
    *A for LHD *B for RHD

    1. Remove the main body ECU (multiplex network body ECU) Click here.

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

      Tech Tips

      Measure the values on the wire harness side with the connector disconnected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A-30 (BECU) - Body ground - Battery power supply Always 11 to 14 V
      A-31 (ALTB) - Body ground - Battery power supply Always 11 to 14 V
      A-32 (IG) - Body ground - Ignition switch power supply Ignition switch ON 11 to 14 V
      A-32 (IG) - Body ground - Ignition switch power supply Ignition switch off Below 1 V
      A-29 (ACC) - Body ground - ACC power supply Ignition switch ACC 11 to 14 V
      A-29 (ACC) - Body ground - ACC power supply Ignition switch off Below 1 V
      A-11 (GND1) - Body ground - Ground Always Below 1 Ω
      G63-3 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G64-17 (KSW) - Body ground G - W-B Unlock warning switch No key in ignition key cylinder 10 kΩ or higher
      G64-17 (KSW) - Body ground G - W-B Unlock warning switch Key inserted in ignition key cylinder Below 1 Ω

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

    3. Install the main body ECU (multiplex network body ECU).

    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
      2I-27 (FLCY) - Body ground R - Body ground Front door LH courtesy switch input Front door LH open Below 1 V
      2I-27 (FLCY) - Body ground R - Body ground Front door LH courtesy switch input Front door LH closed 11 to 14 V
      for RHD
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      2H-26 (FRCY) - Body ground B - Body ground Front door RH courtesy switch input Front door RH open Below 1 V
      2H-26 (FRCY) - Body ground B - Body ground Front door RH courtesy switch input Front door RH closed 11 to 14 V

      If the result is not as specified, the main body ECU (multiplex network body ECU) or driver side junction block assembly may have a malfunction.