KEY REMINDER WARNING SYSTEM(w/o Entry and Start System) TERMINALS OF ECU


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

    w/o Theft Deterrent System

    A005LGHE02
    Text in Illustration
    *A For LHD *B For RHD
    *1 Instrument Panel Junction Block Assembly *2

    Main Body ECU

    (Multiplex Network Body ECU)

    w/ Theft Deterrent System

    A005JKRE02
    Text in Illustration
    *1 Instrument Panel Junction Block Assembly *2

    Main Body ECU

    (Multiplex Network Body ECU)

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

    2. Disconnect the F76 main body ECU (multiplex network body ECU) connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      MB-11 (GND1) - Body ground None - Body ground Ground Always Below 1 Ω
      MB-30 (BECU) - Body ground None - Body ground Battery power supply (for CPU) Always 11 to 14 V
      MB-29 (ACC) - Body ground None - Body ground ACC power supply Engine switch on (ACC) 11 to 14 V
      MB-32 (IG) - Body ground None - Body ground Engine switch power supply Engine switch on (IG) 11 to 14 V
      F76-17 (KSW) - Body ground Y - Body ground Unlock warning switch input No Key in ignition key cylinder (off) 10 kΩ or higher
      Key inserted ignition key cylinder (on) Below 1 Ω

      Tech Tips

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

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

    5. Reconnect the F76 main body ECU (multiplex network body ECU) connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      3D-36 - Body ground L - Body ground Front door LH courtesy light switch input Front door LH open Below 1 V
      Front door LH closed Pulse generation*1
      11 to 14 V*2
      F76-19 (FRCY) - Body ground Y - Body ground Front door RH courtesy light switch input Front door RH open Below 1 V
      Front door RH closed Pulse generation*1
      11 to 14 V*2
      F76-17 (KSW) - Body ground Y - Body ground Unlock warning switch input No Key in ignition key cylinder (off) 11 to 14 V
      Key inserted ignition key cylinder (on) Below 1 V

      • *1: w/ Rear Fog Light

      • *2: w/o Rear Fog Light

      If the result is not as specified, the main body ECU (multiplex network body ECU) may have a malfunction.