KEY REMINDER WARNING SYSTEM TERMINALS OF ECU


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

    B0070ETN47

    1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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    2. Reconnect the instrument panel junction block assembly connectors.

    3. Measure the resistance and voltage 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 Input/Output Terminal Description Condition Specified Condition Related Data List Item
      MB-11 (GND1) - Body ground - - Ground Always Below 1 Ω -
      MB-30 (ACC) - Body ground - Input ACC power supply Ignition switch ACC 11 to 14 V ACC SW
      Ignition switch off Below 1 V
      MB-31 (BECU) - Body ground - Input Battery power supply Always 11 to 14 V -
      MB-32 (IG) - Body ground - Input IG power supply Ignition switch ON 11 to 14 V IG SW
      Ignition switch off Below 1 V

    4. Install the main body ECU (multiplex network body ECU) to instrument panel junction block assembly.

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

      Terminal No. (Symbol) Wiring Color Input/Output Terminal Description Condition Specified Condition Related Data List Item
      K52-1 (FLCY) - Body ground W- Body ground Input Front door courtesy light switch (for LH) input Front door LH open → closed Below 1 V → 11 to 14 V FL Door Courtesy SW
      3A-41 (KSW) - Body ground GR - Body ground Input Key unlock warning switch input No key in ignition key cylinder → Key in ignition key cylinder 11 to 14 V → Below 1 V Key Unlock Warning SW