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Terminals Of Ecu [10/2015 - ]

  1. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    GTY634408Courtesy 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 [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 03/2018] , or refer to REMOVAL [03/2018 - 08/2019] , or refer to REMOVAL [08/2019 - ]

    2. Reconnect the instrument panel junction block assembly connectors.
    3. Measure the resistance and voltage 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) Wiring Color Terminal Description Condition Specified Condition
      MB-31 (BECU) - Body ground - Auxiliary battery power supply Power switch off 11 to 14 V
      MB-32 (IG) - Body ground - Ignition power supply (IG signal) Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      MB-30 (ACC) - Body ground - Ignition power supply (ACC signal) Power switch off Below 1 V
      Power switch on (ACC) 11 to 14 V
      MB-11 (GND1) - Body ground - Ground Always Below 1 Ω
      J8-6 (FLCY) - Body ground P - Body ground Front door courtesy light switch assembly (for LH) input Front door LH closed 10 kΩ or higher
      Front door LH open Below 1 Ω
      J8-27 (FRCY) - Body ground R - Body ground Front door courtesy light switch assembly (for RH) input Front door RH closed 10 kΩ or higher
      Front door RH open Below 1 Ω
      MB-13 (LCTY) - Body ground - Rear door courtesy light switch assembly (for LH) input Rear door LH closed 10 kΩ or higher
      Rear door LH open Below 1 Ω
      MB-2 (RCTY) - Body ground - Rear door courtesy light switch assembly (for RH) input Rear door RH closed 10 kΩ or higher
      Rear door RH open Below 1 Ω
      J8-11 (HCTY) - Body ground R - Body ground Engine hood courtesy switch input Engine hood open 10 kΩ or higher
      Engine hood closed Below 1 Ω
      MB-14 (TRLY) - Body ground - Taillight relay drive output Power switch off 11 to 14 V
    4. Install the main body ECU (multiplex network body ECU) to instrument panel junction block assembly.

      Refer to INSTALLATION [10/2015 - 03/2018] , or refer to INSTALLATION [03/2018 - ]

    5. Measure the voltage and check for pulses according to the value (s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      2B-13 (LSFL) - Body ground B - Body ground Front door LH unlock detection switch input Front door LH unlocked Below 1 V
      Front door LH locked Pulse generation
      2B-12 (LSFR) - Body ground P - Body ground Front door RH unlock detection switch input Front door RH unlocked Below 1 V
      Front door RH locked Pulse generation
      J8-29 (L2) - Body ground P - Body ground Driver door key-linked lock input Driver door key cylinder turned to lock position Below 1 V
      Driver door key cylinder off Pulse generation
      J8-2 (UL3) - Body ground V - Body ground Driver door key-linked unlock input Driver door key cylinder turned to unlock position Below 1 V
      Driver door key cylinder off Pulse generation
      2B-14 (LSWL) - Body ground V - Body ground Rear door LH unlock detection switch input Rear door LH unlocked Below 1 V
      Rear door LH locked Pulse generation
      J9-2 (LSWR) - Body ground L - Body ground Rear door RH unlock detection switch input Rear door RH unlocked Below 1 V
      Rear door RH locked Pulse generation
      2C-26 (SH) - Body ground*1 L - Body ground Security horn assembly drive Security horn assembly sounding
      (Theft deterrent system in alarm sounding state)      		 Pulse generation
      (Below 1 V ← → 11 to 14 V)
      J9-18 (SSCL) - Body ground*2 W - Body ground Theft warning siren assembly drive Theft warning siren assembly sounding
      (Theft deterrent system in alarm sounding state)      		 Pulse generation
      (Below 1 V ← → 11 to 14 V)
      2C-27 (HORN) - Body ground G - Body ground Vehicle horns drive Vehicle horns sounding
      (Theft deterrent system in alarm sounding state)      		 Pulse generation
      (Below 1 V ← → 11 to 14 V)
      2C-31 (HRLY) - Body ground V - Body ground*3
      B - Body ground*4      		 Headlight relay drive output Low beams blinking
      (Theft deterrent system in alarm sounding state)      		 Pulse generation
      (Below 1 V ← → 11 to 14 V)
      2B-29 (ILE) - Body ground GR - Body ground Interior lights drive output Interior lights illuminated
      (Theft deterrent system in alarm sounding state)      		 Below 1 V
      1. *1: w/ Security Horn Assembly
      2. *2: w/o Security Horn Assembly
      3. *3: w/ Automatic Headlight Beam Level Control System
      4. *4: w/o Automatic Headlight Beam Level Control System
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