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Terminals Of Ecu

  1. CHECK AIR CONDITIONING AMPLIFIER 
    Fig 1: Identifying ECU Connector Terminals
    G04950350Courtesy 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 air conditioning amplifier.

      AIR CONDITIONING AMPLIFIER

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L76-5 (IG+) - L76-1 (GND) V-W-B Ignition power supply Engine switch on (IG) 11 to 14 V
      Engine 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
      L76-4 (SOL+) - L76-1 (GND) P-W-B A/C compressor operation signal Engine idling
      Blower switch LO
      A/C switch ON      		 Pulse generation (see WAVEFORM 1 )
      L76-3(BLW)- L76-1 (GND) W-W-B Blower motor control signal Engine switch on (IG) Blower switch LO Pulse generation (see WAVEFORM 2 )
      L77-22 (TFAR) - L77-11 (SG-3) R-L Duct sensor signal (for Passenger side) Engine switch on (IG)
      Passenger side duct sensor temperature: 25°C (77°F)      		 1.8 to 2.2 V
      Engine 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) Engine switch on (IG)
      Passenger side duct sensor temperature: 25°C (77°F)      		 1.8 to 2.2 V
      Engine 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 Engine 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 Engine 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) Engine switch on (IG)
      Front side interior temperature: 25°C (77°F)      		 1.8 to 2.2 V
      L77-32(SG-1)-Body ground L - Body ground Ground for room temperature sensor (for Front) Always Below 1 Ω
      L77-3 (CANH) - L76-1 (GND) B-W-B Hi-level CAN bus line Engine switch on (IG) Pulse generation (see WAVEFORM 3 )
      L77-4 (CANL) - L76-1 (GND) W-W-B Lo-level CAN bus line Engine switch on (IG) Pulse generation (see WAVEFORM 4 )
      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
      L76-26 (PTC2) - Body ground G - Body ground PTC2 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) Engine switch on (IG) Pulse generation
      z1-13(BBUS)-z1-11 (BUSG) - Power supply for BUS IC (for Front) Engine switch on (IG) 11 to 14 V
      z1-11 (BUSG)-Body ground - Ground for BUS IC (for Front) Always Below 1 Ω
      z1-2(BUS)-z1-1 (BUSG) - BUS IC control signal (for Front) Engine switch on (IG) Pulse generation
      z1-3(BBUS)-z1-1 (BUSG) - Power supply for BUS IC (for Front) Engine switch on (IG) 11 to 14 V
      z1-1 (BUSG)-Body ground - Ground for BUS IC (for Front) Always Below 1 Ω
      z1-9(BUS)-z1-8(BUSG) - BUS IC control signal (for Front) Engine switch on (IG) Pulse generation
      z1-10(BBUS)-z1-8 (BUSG) - Power supply for BUS IC (for Front) Engine switch on (IG) 11 to 14 V
      z1-8 (BUSG) - Body ground - Ground for BUS IC (for Front) Always Below 1 Ω
      z1-6(SG-10)-Body ground - Ground for evaporator temperature sensor Always Below 1 Ω
      z1-7(TE)-z1-6(SG-10) - Evaporator temperature sensor signal Engine 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) Engine switch on (IG) Pulse generation
      L76-21 (LIN3) - L76-1 (GND) R-W-B LIN communication signal (for Rear A/C switch) Engine switch on (IG) Pulse generation
      L76-17(SBLW)-L76-1 (GND) G-W-B Blower motor control signal (for Rear) Engine switch on (IG)
      Blower switch LO      		 Pulse generation (see WAVEFORM 5 )
      L76-13(BURR)-L76-12 (BRRG) R-G BUS IC control signal (for Rear) Engine switch on (IG) Pulse generation
      L76-14(BRRB)-L76-12 (BRRG) L-G Power supply for BUS IC (for Rear) Engine 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.

    2. Using an oscilloscope, check waveform 1.
      Fig 2: Waveform Graph (Waveform 1)
      G04950351Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Compressor and pulley operation signal 

      COMPRESSOR AND PULLEY OPERATION SIGNAL

      Item Content
      Terminal No. (Symbols) L76-4 (SOL+) - L76-1 (GND)
      Tool Setting 5 V/DIV., 500 μsec./DIV.
      Condition Engine idling, Blower switch LO, A/C switch ON
    3. Using an oscilloscope, check waveform 2.
      Fig 3: Waveform Graph (Waveform 2)
      G04950352Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Blower motor control signal 

      BLOWER MOTOR CONTROL SIGNAL

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

      HINT:

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

    4. Using an oscilloscope, check waveform 3.
      Fig 4: Waveform Graph (Waveform 3)
      G04950353Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      CAN communication signal 

      CAN COMMUNICATION SIGNAL

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

      HINT:

      The waveform varies depending on the CAN communication signal.

    5. Using an oscilloscope, check waveform 4.
      Fig 5: Waveform Graph (Waveform 4)
      G04950354Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      CAN communication signal 

      CAN COMMUNICATION SIGNAL

      Item Content
      Terminal No. (Symbols) L77-4 (CANL) - L76-1 (GND)
      Tool Setting 1 V/DIV, 10 μsec./DIV.
      Condition Engine switch on (IG)

      HINT:

      The waveform varies depending on the CAN communication signal.

    6. Using an oscilloscope, check waveform 5.
      Fig 6: Waveform Graph (Waveform 5)
      G04950352Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Rear blower motor control signal 

      REAR BLOWER MOTOR CONTROL SIGNAL

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

      HINT:

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

  2. CHECK FRONT LIGHT ECU (FRONT CONTROLLER) 
    Fig 7: Identifying Front Light ECU Connector Terminal
    G04950356Courtesy 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 front light ECU (Front controller).

      FRONT LIGHT ECU (FRONT CONTROLLER)

      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 0.76 to 4.74 V
      Air conditioning pressure sensor signal Refrigerant pressure: Abnormal (less than 0.196 MPa [2.0 kgf/cm2 , 28 psi]) Below 0.76 V
      Air conditioning pressure sensor signal Refrigerant pressure: Abnormal (more than 3.14 MPa [32 kgf/cm2 , 455 psi]) 4.74 V or higher
      B14-12(S5)-A50-2(E) SB - W-B Power supply for pressure sensor Engine switch on (IG) 4.5 to 5.5 V
      B14-14 (SG) - Body ground B - Body ground Ground for pressure sensor Always Below 1 Ω
      B14-20(TM)-B14-19 (TME) BR-G Ambient temperature sensor signal Engine switch on (IG) Ambient temperature: 25°C (77°F) 1.8 to 2.2 V
      Engine 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) After 30 seconds from engine 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) After 30 seconds from engine switch on (IG) and the sensor is exposed to the exhaust gas 1.0 to 4.5 V
      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 Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      A51-12(RDEF)-A50-2 (E) W-W-B Rear defogger switch signal Engine switch on (IG) Rear defogger switch OFF 11 to 14 V
      Engine switch on (IG) Rear defogger switch ON Below 1 V
      A51-13(FDEF)-A50-2 (E) L-W-B Window deicer switch signal Engine switch on (IG) Window deicer switch OFF 11 to 14 V
      Engine switch on (IG) Window deicer switch ON Below 1 V

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

  3. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) 
    Fig 8: Identifying Main Body ECU Connector Terminal (Driver Side Junction Block)
    G04950357Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the DA, L11, L12 and L13 ECU connectors.
    2. Measure the resistance and voltage according to value(s) in the table below.
      MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK)

      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.

  4. CHECK LUGGAGE ROOM JUNCTION BLOCK (REAR JUNCTION BLOCK ECU) 
    Fig 9: Identifying Luggage Room Junction Block Connector Terminal (Rear Junction Block ECU)
    G04950358Courtesy 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 rear junction block ECU.

      LUGGAGE ROOM JUNCTION BLOCK (REAR JUNCTION BLOCK ECU)

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      S62-18(TSD)-S62-26 (TSB) L-B Rear solar sensor signal Engine 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 Engine switch on (IG) Rear A/C switch to AUTO Apply cigarette smoke 4.0 V or higher
      Engine 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 Engine switch on (IG) Rear A/C switch ON Below 1 V
      Engine switch on (IG) Rear A/C switch OFF 11 to 14 V

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

  5. CHECK REAR DOOR ECU LH 
    Fig 10: Identifying Rear Door ECU LH Connector Terminal
    G04950359Courtesy 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 rear door ECU LH.

      REAR DOOR ECU LH

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      O15-13 (TRAD)-O15-26 (TRE) R-Y Rear room temperature sensor signal LH Engine switch on (IG)
      Rear LH side interior temperature: 25°C (77°F)      		 1.8 to 2.2 V
      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.

  6. CHECK REAR DOOR ECU RH 
    Fig 11: Identifying Rear Door ECU LH Connector Terminal
    G04950360Courtesy 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 rear door ECU RH.

      REAR DOOR ECU RH

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      O2-13 (TRAD)-O2-26 (TRE) R-Y Rear room temperature sensor signal LH Engine switch on (IG)
      Rear LH side interior temperature: 25°C (77°F)      		 1.8 to 2.2 V
      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.

  7. CHECK MULTI-DISPLAY 
    Fig 12: Identifying L-59 Multi-Display Connector Terminal
    G04950361Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L59 multi-display connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      MULTI-DISPLAY

      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 Engine switch on (IG) 11 to 14 V
      Engine 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.

  8. CHECK INTEGRATION CONTROL AND PANEL (w/o Multi-display) 
    Fig 13: Identifying L35 Integration Control And Panel Connector Terminal
    G04950362Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L35 integration control and panel connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      INTEGRATION CONTROL AND PANEL (W/O MULTI-DISPLAY)

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L35-1 (+B1)-L35-10 (GND1) B-W-B Battery power source Always 11 to 14 V
      L35-3(IG)-L35-10 (GND1) V-W-B Ignition power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      L35-10(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 (w/o Ottoman) 
    Fig 14: Identifying r2 Rear Power Seat Module Connector Terminal
    G04950363Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the r2 rear power seat module connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      REAR POWER SEAT MODULE (W/O OTTOMAN)

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      r2-3 (E) - Body ground W - Body ground Ground Always Below 1 Ω
      r2-11 (+B)-r2-3(E) W-W Battery Always 11 to 14 V
      r2-13 (IG)-r2-3(E) B-W Ignition power supply Engine switch off Below 1 V
      Engine switch on (IG) 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 (w/ Ottoman) 
    Fig 15: Identifying 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.
      REAR POWER SEAT MODULE (W/ OTTOMAN)

      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.

  11. CHECK ELECTRIC POWER CONTROL ECU 
    Fig 16: Identifying A69 Electric Power Control ECU Connector Terminal
    G04950365Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A69 electric power control ECU connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      ELECTRIC POWER CONTROL ECU VOLTAGE AND RESISTANCE

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      A69-18(VB+)-Body ground O - Body ground Battery power source Always 11 to 14 V
      A69-4 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
    3. Reconnect the A69 electric power control ECU connector.
    4. Measure the voltage according to the value(s) in the table below.
      ELECTRIC POWER CONTROL ECU VOLTAGE

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      A69-7 (IG) - A69-4 (GND) P - W-B Ignition power supply Engine switch off Below 1 V
      Engine switch on (ACC) 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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