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Terminals Of Ecu

  1. CHECK AIR CONDITIONING AMPLIFIER 
    Fig 1: Identifying L76, L77 And Z1 Air Conditioning Amplifier Connectors
    G04950350Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L76, L77 and z1 air conditioning amplifier connectors.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      TERMINALS REFERENCE CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L76-5 (IG+) - L76-1 (GND) V - W-B Ignition power supply Power switch ON (IG) 11 to 14 V
      Power switch OFF Below 1 V
      L76-6 (+B1) - L76-1 (GND) L - W-B Battery power source Always 11 to 14 V
      L76-7 (+B2) - L76-1 (GND) L - W-B Battery power source Always 11 to 14 V
      L76-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L76-2 (FGND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L77-6 (RGND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L77-32 (SG-1) - Body ground L - Body ground Ground for room temperature sensor (for Front) Always Below 1 Ω
      z1-13 (BBUS) - z1-11 (BUSG) - Power supply for BUS IC (for Front) Power switch ON (IG) 11 to 14 V
      z1-11 (BUSG) - Body ground - Ground for BUS IC (for Front) Always Below 1 Ω
      z1-3 (BBUS) - z1-1 (BUSG) - Power supply for BUS IC (for Front) Power switch ON (IG) 11 to 14 V
      z1-1 (BUSG) - Body ground - Ground for BUS IC (for Front) Always Below 1 Ω
      z1-10 (BBUS) - z1-8 (BUSG) - Power supply for BUS IC (for Front) Power switch ON (IG) 11 to 14 V
      z1-8 (BUSG) - Body ground - Ground for BUS IC (for Front) Always Below 1 Ω
      z1-6 (SGA) - Body ground - Ground for evaporator temperature sensor Always Below 1 Ω
      L76-14 (BRRB) - L76-12 (BRRG) L - G Power supply for BUS IC (for Rear) Power switch ON (IG) 11 to 14 V
      L76-12 (BRRG) - Body ground G - Body ground Ground for BUS IC (for Rear) Always Below 1 Ω

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

    3. Reconnect the L76, L77 and z1 air conditioning amplifier connectors
    4. Measure the voltage according to the value(s) in the table below.
      TERMINALS REFERENCE CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L76-3 (BLW) - L76-1 (GND) W - W-B Blower motor control signal Power switch ON (IG) Blower switch LO Pulse generation (see  ewaveform 1)
      L77-22 (TFAR) - L77-11 (SG-3) R - L Duct sensor signal (for Passenger side) Power switch ON (IG) Passenger side duct sensor temperature 25°C (77°F) 1 8 to 2 2 V
      Power switch ON (IG) Passenger side duct sensor temperature 50°C (122°F) 0 8 to 1 2 V
      L77-21 (TFAL) - L77-12 (SG-2) G - Y Duct sensor signal (for Driver side) Power switch ON (IG) Passenger side duct sensor temperature 25°C (77°F) 1 8 to 2 2 V
      Power switch ON (IG) Passenger side duct sensor temperature 50°C (122°F) 0 8 to 1 2 V
      L77-7 (TSD) - L76-1 (GND) SB - W-B Driver side solar sensor signal Power switch ON (IG) Solar sensor subjected to electric light 0 8 to 4 3 V
      L77-8 (TSP) - L76-1 (GND) V - W-B Passenger side solar sensor signal Power switch ON (IG) Solar sensor subjected to electric light 0 8 to 4 3 V
      L77-9 (TR) - L77-32 (SG-1) Y - L Room temperature sensor signal (for Front) Power switch ON (IG) Front side interior temperature 25°C (77°F) 1 8 to 2 2 V
      L77-31 (RH) - L77-32 (SG-1) B - L Humidity sensor signal Power switch ON (IG) Front side interior temperature 25°C (77°F) Vehicle interior humidity 40% 1 61 to 2 24 V
      Power switch ON (IG) Front side interior temperature 25°C (77°F) Vehicle interior humidity 60% 2 26 to 2 66 V
      L77-5 (S5-1) - Body ground R - Body ground Power supply for room temperature sensor signal (for Front) Power switch ON (IG) 4 5 to 5 5 V
      L77-3 (CANH) - L76-1 (GND) B - W-B Hi-level CAN bus line Power switch ON (IG) Pulse generation (see  fwaveform 2)
      L77-4 (CANL) - L76-1 (GND) W - W-B Lo-level CAN bus line Power switch ON (IG) Pulse generation (see  gwaveform 3)
      L76-27 (PTC1) - Body ground W - Body ground PTC1 heater relay operation signal Engine idling
      Set temperature MAX HOT
      Engine coolant temperature Below 65°C (149°F)
      Ambient temperature Below 10°C (50°F)
      Blower switch OFF → LO      		 Below 1 V → 11 to 14 V
      L76-35 (PTC3) - Body ground L - Body ground PTC3 heater relay operation signal Engine idling
      Set temperature MAX HOT
      Engine coolant temperature Below 65°C (149°F)
      Ambient temperature Below 10°C(50°F)
      Blower switch OFF → LO      		 Below 1 V → 11 to 14 V
      z1-12 (BUS) - z1-11 (BUSG) - BUS IC control signal (for Front) Power switch ON (IG) Pulse generation
      z1-2 (BUS) - z1-1 (BUSG) - BUS IC control signal (for Front) Power switch ON (IG) Pulse generation
      z1-9 (BUS) - z1-8 (BUSG) - BUS IC control signal (for Front) Power switch ON (IG) Pulse generation
      z1-7 (TEA) - z1-6(SGA) - Evaporator temperature sensor signal Power switch ON (IG) Evaporator temperature 15°C(59°F) 1 4 to 1 8 V
      L76-28 (LIN1) - L76-1 (GND) R - W-B LIN communication signal (for Infrared ray sensor) Power switch ON (IG) Pulse generation
      L76-21 (LIN3) - L76-1 (GND) R - W-B LIN communication signal (for Rear A/C switch) Power switch ON (IG) Pulse generation
      L76-17 (SBLW) - L76-1 (GND) G - W-B Blower motor control signal (for Rear) Power switch ON (IG) Blower switch LO Pulse generation (see  hwaveform 4)
      L76-13 (BURR) - L76-12 (BRRG) R - G BUS IC control signal (for Rear) Power switch ON (IG) Pulse generation

      If the result is not as specified, the air conditioning amplifier may have a malfunction.

    5. Using an oscilloscope, check waveform 1.

      Blower motor control signal 

      BLOWER MOTOR CONTROL SIGNAL REFERENCE

      Item Content
      Terminal No (Symbols) L76-3 (BLW) - L76-1 (GND)
      Tool Setting 1 V/DIV, 500 μsec/DIV
      Condition Power switch ON (IG), Blower switch LO

      HINT:

      When the blower level is increased, the duty ratio changes accordingly

      Fig 2: Identifying Waveform 1
      G04950352Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check waveform 2.

      CAN communication signal 

      CAN COMMUNICATION SIGNAL REFERENCE

      Item Content
      Terminal No (Symbols) L77-3 (CANH) - L76-1 (GND)
      Tool Setting 1 V/DIV, 10 μsec/DIV
      Condition Power switch ON (IG)

      HINT:

      The waveform varies depending on the CAN communication signal.

      Fig 3: Identifying Waveform 2
      G04950353Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Using an oscilloscope, check waveform 3.

      CAN communication signal 

      CAN COMMUNICATION SIGNAL REFERENCE

      Item Content
      Terminal No (Symbols) L77-4 (CANL) - L76-1 (GND)
      Tool Setting 1 V/DIV, 10 μsec/DIV

      HINT:

      The waveform varies depending on the CAN communication signal

      Fig 4: Identifying Waveform 3
      G04950354Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Using an oscilloscope, check waveform 4.

      Rear blower motor control signal 

      REAR BLOWER MOTOR CONTROL SIGNAL REFERENCE

      Item Content
      Terminal No (Symbols) L76-17 (SBLW) - L76-1 (GND)
      Tool Setting 1 V/DIV, 500 μsec/DIV
      Condition Power switch ON (IG), Blower switch LO

      HINT:

      When the rear blower level is increased, the duty ratio changes accordingly.

      Fig 5: Identifying Waveform 4
      G04950352Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK FRONT CONTROLLER 
    Fig 6: Identifying A50, A51, A52 And B14 Connectors
    G04950356Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A50, A52 and B14 front controller connectors.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      TERMINALS REFERENCE CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      B14-14 (SG) - Body ground B - Body ground Ground for pressure sensor Always Below 1 Ω
      A52-1 (BATB) - A50-2 (E) P - W-B Power source Always 11 to 14 V
      A52-5 (ALTB) - A50-2 (E) L - W-B Power source Always 11 to 14 V
      A50-1 (FMB3) - A50-2 (E) LG - W-B Power source Always 11 to 14 V
      A50-2 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A50-5 (FMIG) - A50-2 (E) Y - W-B Power source Power switch ON (IG) 11 to 14 V
      Power switch OFF Below 1 V

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

    3. Reconnect the A50, A52 and B14 front controller connectors.
    4. Measure the voltage according to the value(s) in the table below.
      TERMINALS REFERENCE CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      B14-13 (PRS) - B14-14 (SG) W - B Air conditioning pressure sensor signal Refrigerant pressure Normal 0 7 to 4 8 V
      Air conditioning pressure sensor signal Refrigerant pressure Abnormal (less than 0 196 MPa [2 0 kgf/cm2 , 28 psi]) Below 0 7V
      Air conditioning pressure sensor signal Refrigerant pressure Abnormal (more than 3 14 MPa [32 kgf/cm2 , 455 psi]) 4 8 V or higher
      B14-12 (S5) - A50-2 (E) SB - W-B Power supply for pressure sensor Power switch ON (IG) 4 5 to 5 5 V
      B14-20 (TM) - B14-19 (TME) BR - G Ambient temperature sensor signal Power switch ON (IG) Ambient temperature 25°C (77°F) 1 8 to 2 2 V
      Power switch ON (IG) Ambient temperature 40°C (105°F) 1 2 to 1 6 V
      B14-9 (DGSE) - B14-11 (DGS) V - R Exhaust gas sensor signal (CO, HC) 30 seconds after power switch ON (IG) and the sensor is exposed to the exhaust gas 1 0 to 4 5 V
      B14-9 (DGSE) - B14-10 (DGS1) V - O Exhaust gas sensor signal (Nox) 30 seconds after power switch ON (IG) and the sensor is exposed to the exhaust gas 1 0 to 4 5 V
      A51-12 (RDEF) - A50-2 (E) W - W-B Rear defogger switch signal Power switch ON (IG) Rear defogger switch OFF 11 to 14 V
      Power switch ON (IG) Rear defogger switch ON Below 1 V
      A51-13 (FDEF) - A50-2 (E) L - W-B Window deicer switch signal Power switch ON (IG) Window deicer switch OFF 11 to 14 V
      Power switch ON (IG) Window deicer switch ON Below 1 V

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

  3. CHECK HYBRID VEHICLE CONTROL ECU 
    Fig 7: Identifying A74, A75, A76 And E55 Connectors
    G05774221Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and resistance according to the value(s) in the table below.

      HINT:

      Check from the rear of the connector while it is connected to the hybrid vehicle control ECU.

      TERMINALS REFERENCE CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      E55-21 (ITE) - A74-7 (E) R - W-B Compressor operation signal Power switch ON (IG) A/C switch OFF Pulse generation (see  bwaveform 1)
      E55-30 (CLK) - A74-7 (E) RB - W-B Compressor operation signal Power switch ON (IG) A/C switch OFF Pulse generation (see  bwaveform 1)
      E55-31 (STB) - A74-7 (E) L - W-B Compressor operation signal Power switch ON (IG) A/C switch OFF Pulse generation (see  bwaveform 1)
      E55-32 (ETI) - A74-7 (E) B - W-B Compressor operation signal Power switch ON (IG) A/C switch OFF Pulse generation (see  bwaveform 1)
      A75-5 (WP) - A74-7 (E) B - W-B Heater water pump operation signal Power switch ON (IG) Below 2 V
      A74-15 (CANL) - A74-7 (E) B - W-B CAN communication signal Power switch ON (IG) Pulse generation (see  cwaveform 2)
      A74-16 (CANH) - A74-7 (E) W - W-B CAN communication signal Power switch ON (IG) Pulse generation (see  cwaveform 2)

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

    2. Using an oscilloscope, check waveform 1.

      Compressor operation signal 

      COMPRESSOR OPERATION SIGNAL REFERENCE

      Item Content
      Terminal No (Symbols)
      • CH1 E55-21 (ITE) - A74-7 (E1)
      • CH2 E55-30 (CLK) - A74-7 (E1)
      • CH3 E55-31 (STB) - A74-7 (E1)
      • CH4 E55-32 (ETI) - A74-7 (E1)
      Tool Setting 100 V/DIV, 100 msec/DIV
      Condition Power switch ON (IG) A/C switch OFF
      Fig 8: Identifying Waveform 1
      G05774222Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      The waveform varies depending on the compressor operation signal

    3. Using an oscilloscope, check waveform 2

      CAN communication signal 

      CAN COMMUNICATION SIGNAL REFERENCE

      Item Content
      Terminal No (Symbols)
      • CH1 A74-15 (CANL) - A74-7 (E1)
      • CH2 A74-16 (CANH) - A74-7 (E1)
      Tool Setting 1 V/DIV, 200 μsec/DIV
      Condition Power switch ON (IG)

      HINT:

      The waveform varies depending on the CAN communication signal.

      Fig 9: Identifying Waveform 2
      G05774223Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) 
    Fig 10: Identifying DA, L12 and L13 Connector Terminals
    G04950357Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the DA, L12 and L13 ECU connectors
    2. Measure the resistance and voltage according to the value(s) in the table below
      TERMINALS REFERENCE CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      DA-40 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      DA-41 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L12-1 (AM2) - DA-40 (GND2) W - W-B Battery power supply Always 11 to 14 V
      L13-6 (AM1) - DA-40 (GND2) W - W-B Battery power supply Always 11 to 14 V

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

  5. CHECK LUGGAGE ROOM JUNCTION BLOCK (REAR JUNCTION BLOCK ECU) 
    Fig 11: Identifying LA And S62 Connector Terminals
    G04950358Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage according to the value(s) in the table below.

      HINT:

      Check from the rear of the connector while it is connected to the rear junction block ECU.

      TERMINALS REFERENCE CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      S62-18 (TSD) - S62-26 (TSB) L - B Rear solar sensor signal Power switch ON (IG) 0 8 to 4 3 V
      Rear solar sensor subjected to electric light
      S62-7 (SMOK) - LA-43 (E) B - W-B Smoke sensor operation signal Power switch ON (IG) Rear A/C switch to AUTO Apply cigarette smoke 4 0 V or higher
      Power switch ON (IG) Rear A/C switch to AUTO No cigarette smoke Below 1 V
      S62-5 (RMGV) - LA-43 (E) L - BW-B Rear magnetic valve operation voltage Power switch ON (IG) Rear A/C switch ON Below 1 V
      Power switch ON (IG) Rear A/C switch OFF 11 to 14 V
      S62-25 (SSRE) - LA-51 (SSRE) - Rear evaporator temperature sensor signal Power switch ON (IG) Rear evaporator temperature 15°C (59°F) 11 to 14 V

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

  6. CHECK REAR DOOR ECU LH 
    Fig 12: Identifying O13, O14 And O15 Connector Terminals
    G04950359Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the O14 rear door ECU LH connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      TERMINALS REFERENCE CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      O14-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      O14-6 (BDR) - O14-1 (GND) O - W-B Battery power supply Always 11 to 14 V
      O14-11 (CPUB) - O14-1 (GND) B - W-B Battery power supply Always 11 to 14 V

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

    3. Reconnect the O14 rear door ECU LH connector
    4. Measure the voltage according to the value(s) in the table below.
      TERMINALS REFERENCE CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      O15-13 (TRAD) - O15-26 (TRE) V-Y Rear room temperature sensor signal LH Power switch ON (IG) Rear LH side interior temperature 25°C (77°F) 1 8 to 2 2 V

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

  7. CHECK REAR DOOR ECU RH 
    Fig 13: Identifying O2, O3 And O4 Connector Terminals
    G04950360Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the 03 rear door ECU RH connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      TERMINALS REFERENCE CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      O3-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      O3-6 (BDR) - O3-1 (GND) O - W-B Battery power supply Always 11 to 14 V
      O3-11 (CPUB) - O3-1 (GND) B - W-B Battery power supply Always 11 to 14 V

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

    3. Reconnect the 03 rear door ECU RH connector.
    4. Measure the voltage and resistance according to the value(s) in the table below
      TERMINALS REFERENCE CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      O2-13 (TRAD) - O2-26 (TRE) V-Y Rear room temperature sensor signal RH Power switch ON (IG) Rear RH side interior temperature 25°C (77°F) 1 8 to 2 2 V

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

  8. CHECK DISPLAY AND NAVIGATION ASSEMBLY*1, MULTI-DISPLAY*2, *3 

    HINT:

    • *1: w/ Navigation System (for HDD)
    • *2. w/ Navigation System (for DVD)
    • *3: w/o Navigation System
      Fig 14: Identifying Terminals Of L59 Display Connector
      G04950361Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L59 display connector.
    2. Measure the voltage and resistance according to the value(s) in the table below
      TERMINALS REFERENCE CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L59-1 (+B1) - L59-10 (GND1) R - W-B Battery power source Always 11 to 14 V
      L59-3(IG) - L59-10 (GND1) V - W-B Ignition power supply Power switch ON (IG) 11 to 14 V
      Power switch OFF Below 1 V
      L59-10 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  9. CHECK REAR POWER SEAT MODULE (except Ottoman) 
    Fig 15: Identifying Rear Power Seat Module Switch Connectors Z54 & Z56
    G05774229Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the z54 rear power seat module connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      TERMINALS REFERENCE CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      z54-3 (E) - Body ground W - Body ground Ground Always Below 1 Ω
      z54-11 (B) - z54-3 (E) W-W Battery Always 11 to 14 V

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

  10. CHECK REAR POWER SEAT MODULE (for Ottoman) 
    Fig 16: Identifying Terminals Of S15 Rear Power Seat Module Connector
    G04950364Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S15 rear power seat module connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      TERMINALS REFERENCE CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      S15-5 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      S15-6 (B) - S15-5 (E) R - W-B Battery Always 11 to 14 V

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

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