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Terminals Of Ecu

  1. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY 
    1. Disconnect the P22 switch connector.
      Fig 1: Identifying P22 ECU Switch Connector Terminals
      G05270444Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard 

      MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY STANDARD

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CPUB (P22-9) - Body ground L-B - Body ground +B (CPUB) power supply Always 10 to 14 V
      BDR (P22-10) - Body ground G - Body ground +B (BDR) power supply Always 10 to 14 V
      SIG (P22-20) - Body ground BR - Body ground +B (SIG) power supply Ignition switch OFF → ON Below 1 V → 10 to 14 V
      GND (P22-2) - Body ground W-B - Body ground Ground Constant Below 1 Ω
      KL (P22-4) - Body ground BR - Body ground Driver door key linked door lock input Driver door key cylinder OFF → LOCK 10 kΩ or higher → Below 1 Ω
      KUL (P22-14) - Body ground GR - Body ground Driver door key linked door unlock input Driver door key cylinder OFF → UNLOCK 10 kΩ or higher → Below 1 Ω
      LSW (P22-16) - Body ground P - Body ground Driver door lock position switch input Driver door UNLOCK → LOCK 10 kΩ or higher → Below 1 Ω

      HINT:

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

    3. Reconnect the switch connector and measure the voltage according to the value(s) in the table below.

      Standard voltage 

      MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY STANDARD VOLTAGE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      KL (P22-4) - Body ground BR - Body ground Driver door key linked door lock input Driver door key cylinder OFF → LOCK 10 to 14 V → Below 1 V
      KUL (P22-14) - Body ground GR - Body ground Driver door key linked door unlock input Driver door key cylinder OFF → UNLOCK 10 to 14 V → Below 1 V
      LSW (P22-16) - Body ground P - Body ground Driver door lock position switch input Driver door UNLOCK → LOCK Below 1 V → 10 to 14 V (or pulse generation)

      HINT:

      • Use an oscilloscope to check the output voltages of terminal LSW.
      • If the result is not as specified, the switch (door ECU) may have a malfunction.
  2. CHECK INSTRUMENT PANEL J/B ASSEMBLY (BODY ECU) 
    1. Disconnect the 1A, 1D, 1F, U, 1M, 1O, B4, B5 and B6 connectors.
      Fig 2: Identifying 1A, 1D, 1F, 1J, 1M, 1O, B4, B5 & B6 Connector Terminals
      G05270445Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard 

      INSTRUMENT PANEL J/B ASSEMBLY (BODY ECU) STANDARD

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      BECU (1D-10) - Body ground L-B - Body ground +B (BECU) power supply Always 10 to 14 V
      ALTB (1D-16) - Body ground W - Body ground +B (power system, generator system) power supply Always 10 to 14 V
      BATB (1A-1) - Body ground W - Body ground (*3 ) B - Body ground (*4 ) +B (power system, battery system) power supply Always 10 to 14 V
      KSW (B4-21) - Body ground B - Body ground Key unlock warning switch input No key in ignition key cylinder → Key inserted 10 kΩ or higher → Below 1 Ω
      GND1 (1F-10) - Body ground W-B - Body ground Ground Always Below 1 Ω
      GND2 (1M-9) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L1 (1J-3) - Body ground V - Body ground Passenger door control switch LOCK input Passenger door control switch OFF → LOCK 10 kΩ or higher → Below 1 Ω
      UL1 (1J-4) - Body ground BR - Body ground Passenger door control switch UNLOCK input Passenger door control switch OFF → UNLOCK 10 kΩ or higher → Below 1 Ω
      DCTY (B6-14) - Body ground L - Body ground Driver door courtesy switch input Driver door CLOSED → OPEN 10 kΩ or higher → Below 1 Ω
      PCTY (B5-23) - Body ground L - Body ground Passenger door courtesy switch input Passenger door CLOSED → OPEN 10 kΩ or higher → Below 1 Ω
      LCTY (10-7) - Body ground B - Body ground Rear left door courtesy switch input Rear left door CLOSED → OPEN 10 kΩ or higher → Below 1 Ω
      RCTY (B6-16) - Body ground GR - Body ground Rear right door courtesy switch input Rear right door CLOSED → OPEN 10 kΩ or higher → Below 1 Ω
      PBDS (B5-2)*1 - Body ground V - Body ground Power back door opener/closer switch input Power back door opener/close switch OFF → ON 10 kΩ or higher → Below 1 Ω
      BDSU (B5-3)*2 - Body ground W - Body ground Back door opener switch (outside handle switch) input Back door opener switch OFF → ON 10 kΩ or higher → Below 1 Ω
      BCTY (B5-25) - Body ground P - Body ground Back door courtesy switch input Back door CLOSED → OPEN 10 kΩ or higher → Below 1 Ω
      HINT:
      • If the result is not as specified, there may be a malfunction on the wire harness side.
      • *1: w/ Power back door
      • *2: w/o Power back door
      • *3: w/ Air suspension system
      • *4: w/o Air suspension system
    3. Reconnect the J/B and ECU connectors and measure the voltage according to the value(s) in the table below.

      Standard voltage 

      INSTRUMENT PANEL J/B ASSEMBLY (BODY ECU) STANDARD VOLTAGE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (1F-11) - Body ground Y - Body ground Ignition power supply Ignition switch OFF → ON 10 to 14 V → Below 1 V
      ACT+ (1K-2) - Body ground L - Body ground Door lock motor LOCK drive output (Driver door) Door control switch (Master switch or passenger side switch) or driver side door key cylinder
      OFF →
      LOCK →
      OFF      		 Below 1 V →
      10 to 14 V →
      Below 1 V
      ACT+ (1J-1) - Body ground L - Body ground Door lock motor LOCK drive output (Passenger door) Door control switch (Master switch or passenger side switch) or driver side door key cylinder
      OFF →
      LOCK →
      OFF      		 Below 1 V →
      10 to 14 V →
      Below 1 V
      ACT+ (1P-11) - Body ground R-Y - Body ground Door lock motor LOCK drive output (Rear left door) Door control switch (Master switch or passenger side switch) or driver side door key cylinder
      OFF →
      LOCK →
      OFF      		 Below 1 V →
      10 to 14 V →
      Below 1 V
      ACT+ (1F-5) - Body ground L - Body ground Door lock motor LOCK drive output (Rear right door) Door control switch (Master switch or passenger side switch) or driver side door key cylinder
      OFF →
      LOCK →
      OFF      		 Below 1 V →
      10 to 14 V →
      Below 1 V
      TR+ (B4-1)* - Body ground BR - Body ground Door lock motor LOCK drive output (Back door) Door control switch (Master switch or passenger side switch) or driver side door key cylinder
      OFF →
      LOCK →
      OFF      		 Below 1 V →
      10 to 14 V →
      Below 1 V
      ACTD (B6-4) - Body ground R - Body ground Door lock motor UNLOCK drive output (Driver door) Door control switch (Master switch or passenger side switch) or driver side door key cylinder
      OFF →
      UNLOCK →
      OFF      		 Below 1 V →
      10 to 14 V →
      Below 1 V
      ACT- (1J-2) - Body ground R - Body ground Door lock motor UNLOCK drive output (Passenger door) Door control switch (Master switch or passenger side switch) or driver side door key cylinder
      OFF →
      UNLOCK →
      OFF      		 Below 1 V →
      10 to 14 V →
      Below 1 V
      ACT- (1P-6) - Body ground P - Body ground Door lock motor UNLOCK drive output (Rear left door) Door control switch (Master switch or passenger side switch) or driver side door key cylinder
      OFF →
      UNLOCK →
      OFF      		 Below 1 V →
      10 to 14 V →
      Below 1 V
      ACT- (1F-18) - Body ground R - Body ground Door lock motor UNLOCK drive output (Rear right door) Door control switch (Master switch or passenger side switch) or driver side door key cylinder
      OFF →
      UNLOCK →
      OFF      		 Below 1 V →
      10 to 14 V →
      Below 1 V
      LSWP (B5-27) - Body ground Y - Body ground Passenger door lock position switch input Passenger door UNLOCK → LOCK Below 1 V → 10 to 14 V (or pulse generation)
      LSWL (1P-5) - Body ground GR - Body ground Rear left door lock position switch input Rear left door UNLOCK → LOCK Below 1 V → 10 to 14 V (or pulse generation)
      LSWR (B5-5) - Body ground B - Body ground Rear right door lock position switch input Rear right door UNLOCK → LOCK Below 1 V → 10 to 14 V (or pulse generation)
      HINT:
      • *: w/o Power Back Door
      • Use an oscilloscope to check the output voltages of terminals LSWP, LSWL and LSWR.
      • If the result is not as specified, the J/B (body ECU) may have a malfunction.
  3. CHECK POWER BACK DOOR ECU (w/ Power back door system) 
    1. Disconnect the P13 and P14 ECU connectors.
      Fig 3: Identifying P13 & P14 ECU Connector Terminals
      G05140883Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard voltage and resistance 

      POWER BACK DOOR ECU (W/ POWER BACK DOOR SYSTEM) VOLTAGE AND RESISTANCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      ECUB (P13-10) - Body ground BR - Body ground ECU (ECUB) power supply Always 10 to 14 V
      B (P14-2) - Body ground Y - Body ground +B (ECUB) power supply Always 10 to 14 V
      GND (P14-8) - Body ground W-B - Body ground Ground Always Below 1 Ω
      IG (P13-9) - Body ground GR - Body ground Ignition switch input Ignition switch OFF → ON Below 1 V → 10 to 14 V
      CTYE (P13-7) - Body ground P - Body ground Back door courtesy switch input Back door CLOSED → OPEN 10 kΩ or higher → Below 1 Ω
      CTYO (P13-19) - Body ground BR - Body ground Back door courtesy switch output Back door CLOSED → OPEN 10 kΩ or higher → Below 1 Ω
      HSW (P13-3) - Body ground GR - Body ground Back door opener switch (outside handle switch) input Back door opener switch OFF → ON 10 kΩ or higher → Below 1 Ω

      HINT:

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

    3. Reconnect the ECU connectors and measure the voltage according to the value(s) in the table below.

      Standard voltage 

      POWER BACK DOOR ECU (W/ POWER BACK DOOR SYSTEM) VOTAGE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      POS (P13-21) - Body ground LG - Body ground Back door lock position switch input Back door OPEN →
      Closer in operation →
      CLOSED      		 Below 1 V →
      10 to 14 V →
      Below 1 V →
      FUL (P13-18) - Body ground V - Body ground Back door lock full-latch switch input Back door CLOSED → OPEN 10 to 14 V → Below 1 V
      HAF (P13-8) - Body ground R - Body ground Back door lock half-latch switch input Back door OPEN →
      Closer in operation →
      CLOSED      		 Below 1 V →
      10 to 14 V →
      Below 1 V →
      DC+ (P13-12) - Body ground G - Body ground Back door lock closer motor drive output (Close) Back door OPEN →
      Not completely closed →
      Motor in normal rotation →
      Motor in reverse rotation →
      Operation completed (Back door CLOSED)      		 Below 1 V →
      Below 1 V →
      10 to 14 V →
      Below 1 V →
      Below 1 V →
      DC- (P13-11) - Body ground B - Body ground Back door lock closer motor drive output (Release) Back door OPEN →
      Not completely closed →
      Motor in normal rotation →
      Motor in reverse rotation →
      Operation completed (Back door CLOSED)      		 Below 1 V →
      Below 1 V →
      Below 1 V →
      10 to 14 V →
      Below 1 V →

      HINT:

      If the result is not as specified, the ECU may have a malfunction.

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