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Terminals Of Ecu [12/2019 - 11/2023]

  1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 
    GTY929035Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

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

      HINT: 

      Measure the values on the wire harness side with the connectors connected.

      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      H42-19 (GND2) - Body ground Ground Always Below 1 Ω
    3. Reconnect the instrument panel junction block assembly connectors.
    4. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      MB-11 (GND1) - Body ground Ground Always Below 1 Ω
      MB-30 (ACC) - Body ground ACC power supply Ignition switch ACC 11 to 14 V
      Ignition switch off Below 1 V
      MB-31 (BECU) - Body ground Auxiliary battery power supply Ignition switch off*1
      Always*2      		 11 to 14 V
      MB-32 (IG) - Body ground IG power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      1. *1: for HV Model
      2. *2: for Gasoline Model
    5. Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.

      Refer to INSTALLATION [12/2019 - 10/2022] , or refer to INSTALLATION [10/2022 - 11/2023]

    6. Measure the voltage according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      H43-17 (LSWR) - Body ground Rear door RH unlock detection switch input Rear door RH unlocked → Rear door RH locked Below 1 V → 11 to 14 V
      H43-1 (FLCY) - Body ground Front door courtesy light switch (for LH) input Front door LH open → closed Below 1 V → 11 to 14 V
      H43-6 (FRCY) - Body ground Front door courtesy light switch (for RH) input Front door RH open → closed Below 1 V → 11 to 14 V
      4D-24 (LCTY) - Body ground Rear door courtesy light switch (for LH) input Rear door LH open → closed Below 1 V → 11 to 14 V
      4A-31 (RCTY) - Body ground Rear door courtesy light switch (for RH) input Rear door RH open → closed Below 1 V → 11 to 14 V
      4D-34 (BCTY) - Body ground Back door courtesy light switch input Back door open → closed Below 1 V → 11 to 14 V
      4B-13 (LSFL) - Body ground Front door LH unlock detection switch input Front door LH unlocked → locked Below 1 V → 11 to 14 V
      4B-12 (LSFR) - Body ground Front door RH unlock detection switch input Front door RH unlocked → locked Below 1 V → 11 to 14 V
      4B-14 (LSWL) - Body ground Rear door LH unlock detection switch input Rear door LH unlocked → Rear door LH locked Below 1 V → 11 to 14 V
      4D-8 (ACT-) - Body ground Door lock motor unlock drive output Door control switch or driver door key cylinder off → on (unlock) Below 1 V → 11 to 14 V → Below 1 V
      4D-9 (ACT-) - Body ground Door lock motor unlock drive output Door control switch or driver door key cylinder off → on (unlock) Below 1 V → 11 to 14 V → Below 1 V
      4D-6 (ACT+) - Body ground Door lock motor lock drive output Door control switch or driver door key cylinder off → on (lock) Below 1 V → 11 to 14 V → Below 1 V
      4B-4 (ACTD) - Body ground Door lock motor unlock drive output Door control switch or driver door key cylinder off → on (unlock) Below 1 V → 11 to 14 V → Below 1 V
      4D-20 (TR+) - Body ground* Back door lock motor unlock drive output Back door opener switch off → on Below 1 V → 11 to 14 V → Below 1 V
      H44-17 (UL3) - Body ground Driver door key-linked unlock input Driver door key cylinder in neutral position → on (unlock) 11 to 14 V → Below 1 V
      H44-18 (L2) - Body ground Driver door key-linked lock input Driver door key cylinder in neutral position → on (lock) 11 to 14 V → Below 1 V
      4B-16 (L1) - Body ground Door control switch assembly input Door control switch assembly off → on (lock) 11 to 14 V → Below 1 V
      4B-39 (UL1) - Body ground Door control switch assembly input Door control switch assembly off → on (unlock) 11 to 14 V → Below 1 V
      4A-7 (GSW) - Body ground Airbag sensor signal (collision detection signal) Ignition switch ON with airbag sensor assembly connector disconnected 4.3 to 5.5 V
      1. *: w/o Power Back Door System
  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    GTY862615Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *A for Gasoline Model - -
    1. Disconnect the H48 certification ECU (smart key ECU assembly) connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.

      HINT: 

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

      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      H48-4 (+B) - Body ground Auxiliary battery power supply Ignition switch off*1
      Always*2      		 11 to 14 V
      H48-18 (E) - Body ground Ground Always Below 1 Ω
      1. *1: for HV Model
      2. *2: for Gasoline Model
    3. Reconnect the H48 certification ECU (smart key ECU assembly) connector.
    4. Measure the resistance and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      M5-26 (TSW5) - Body ground Back door opener switch input Back door opener switch (open switch) off → on Below 1 Ω → pulse generation
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