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Terminals Of Ecu [11/2023 - ]

  1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    GTY1178468Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A88 and H138 certification ECU (smart key ECU assembly) connectors.
    2. 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) Terminal Description Condition Specified Condition Related Data List Item/DTC
      A88-15 (NE) - Body ground Engine speed signal Always 10 kΩ or higher Power Source Control 
      1. Engine Condition
      A88-21 (STP1) - Body ground Stop light switch signal Brake pedal depressed → Brake pedal released 9 V or higher → 1 V or less Power Source Control 
      1. Stop Light Switch
      H138-6 (+B) - H138-29 (E) Power source Ignition switch off 11 to 14 V -
      H138-14 (P) - H138-29 (E) P position signal Shift position in P → Shift position not in P 30 kΩ or higher → Below 200 Ω Power Source Control 
      1. Shift P Signal
      A88-22 (CUTB) - Body ground Dark current cut pin* Ignition switch off 11 to 14 V -
      H138-29 (E) - Body ground GND Always Below 1 Ω -
      H138-11 (SLP) - H138-29 (E) GND Always Below 1 Ω -
      H138-23 (SSW3) - Body ground SSW3 contact signal Engine switch pushed → Engine switch not pushed Below 15 Ω → 10 kΩ or higher Power Source Control 
      1. Push Start Switch 3
      H138-27 (SSW2) - Body ground SSW2 contact signal Engine switch pushed → Engine switch not pushed Below 15 Ω → 10 kΩ or higher Power Source Control 
      1. Push Start Switch 2
      H138-19 (SSW1) - Body ground SSW1 contact signal Engine switch pushed → Engine switch not pushed Below 15 Ω → 10 kΩ or higher Power Source Control 
      1. Push Start Switch 1
      1. *: In order to prevent the vehicle auxiliary battery from being depleted when the vehicle is shipped long distances, a fuse that cuts unnecessary electrical load while the vehicle is being shipped is installed in the circuit. If the fuse is removed, the circuit becomes open. If the fuse that is between the vehicle auxiliary battery and terminal CUTB is removed and the circuit is open, the certification ECU (smart key ECU assembly) changes to a certain control mode (example: the transmission of radio waves every 0.25 seconds, which form the detection area, stops).
    3. Connect the A88 and H138 certification ECU (smart key ECU assembly) connectors.
    4. Measure the voltage and resistance, and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition Related Data List Item/DTC
      A88-3 (STA) - H138-29 (E) When starting the engine, this monitors the voltage sent from terminal STAR to the starter relay to judge whether the engine is "being started". Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off) 6 V or higher*1 → 1.0 V or less -
      A88-10 (STAR) - H138-29 (E) Outputs voltage to the starter relay 
      • Outputs voltage (12 V) to the starter relay when starting the engine. (Max. 30 sec. Turns off when an engine speed of 1000 rpm.)

      HINT: 
      When Hi is selected, a start request signal (STAR) will not be output even though a start request signal (STSW) is input.      		 Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off) 6 V or higher*1 → 1.0 V or less -
      A88-15 (NE) - Body ground Engine speed signal Idling (engine warmed up) Pulse generation
      (See waveform 1)      		 Power Source Control 
      1. Engine Condition
      H138-8 (LIN) - H138-29 (E) LIN communication line Ignition switch ON Pulse generation -
      H138-14 (P) - H138-29 (E) P position signal Shift position in P → Shift position not in P 9 V or higher → 2.76 V or less Power Source Control 
      1. Shift P Signal
      H138-23 (SSW3) - H138-29 (E) SSW3 contact signal Engine switch not pushed → Engine switch pushed 9 V or higher → 1 V or less Power Source Control 
      1. Push Start Switch 3
      H138-27 (SSW2) - H138-29 (E) SSW2 contact signal Engine switch not pushed → Engine switch pushed 9 V or higher → 1 V or less Power Source Control 
      1. Push Start Switch 2
      H138-19 (SSW1) - H138-29 (E) SSW1 contact signal Engine switch not pushed → Engine switch pushed 9 V or higher → 1 V or less Power Source Control 
      1. Push Start Switch 1
      H138-21 (ACCD) - H138-29 (E) ACC signal Ignition switch off → Ignition switch ACC 1 V or less → 8.5 V or higher Power Source Control 
      1. ACC Relay Monitor
      A88-11 (IGRD) - H138-29 (E) IG signal Ignition switch off → Ignition switch ON 1 V or less → 9 V or higher Power Source Control 
      1. IGR Relay Circuit (Outside) Monitor
      A88-24 (IGPD) - H138-29 (E) IG signal Ignition switch off → Ignition switch ON 1 V or less → 9 V or higher Power Source Control 
      1. IGP Relay Circuit (Outside) Monitor
      A88-13 (SPD) - H138-29 (E) Vehicle speed signal Vehicle being driven at approx. 5 km/h (3 mph) Pulse generation
      (See waveform 2)      		 Power Source Control 
      1. Vehicle Running Condition (Line)
      H138-4 (CLG5) - H138-29 (E) Output to No. 1 indoor electrical key antenna assembly (front floor) Procedure:
      1. Ignition switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 3)      		 -
      H138-5 (CG5B) - H138-29 (E) Output to No. 1 indoor electrical key antenna assembly (front floor) (terminal on opposite side of component from CLG5 output terminal) Procedure:
      1. Ignition switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 3)      		 -
      M106-1 (CLG6) - H138-29 (E) Output to No. 2 indoor electrical key antenna assembly (rear floor) Procedure:
      1. Ignition switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 4)      		 -
      M106-2 (CG6B) - H138-29 (E) Output to No. 2 indoor electrical key antenna assembly (rear floor) (terminal on opposite side of component from CLG6 output terminal) Procedure:
      1. Ignition switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 3)      		 -
      M106-10 (CLG7) - H138-29 (E) Output to No. 3 indoor electrical key antenna assembly (inside luggage compartment) Procedure:
      1. Ignition switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 3)      		 -
      M106-9 (CG7B) - H138-29 (E) Output to No. 3 indoor electrical key antenna assembly (inside luggage compartment) (terminal on opposite side of component from CLG7 output terminal) Procedure:
      1. Ignition switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 3)      		 -
      H138-30 (AGND) - Body ground Transponder key amplifier ground Always Below 1 Ω -
      H138-12 (ANT1) - H138-30 (AGND) Signal input / output from transponder key coil (transponder key coil built into engine switch) Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed Pulse generation
      (See waveform 5)      		 Smart Key 
      1. Encrypt Code Difference
      H138-13 (ANT2) - H138-30 (AGND) Signal input / output from transponder key coil (transponder key coil built into engine switch) Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed Pulse generation
      (See waveform 6)
      H138-25 (IND) - H138-29 (E) Security indicator output Ignition switch off → ON Pulse generation → Below 2 V -
      M106-20 (WCSW) - H138-29 (E)*2 Wireless charger system stop signal Procedure:
      1. Ignition switch off
      2. Electrical key transmitter sub-assembly inside vehicle
      3. Ignition switch off → ACC or ON
      		 Below 1 V → 4.5 to 6 V
      (For 1 second after ignition switch to ACC or ON)      		 -
      1. *1: While the engine is cranking, the auxiliary battery voltage may drop to approximately 6 V.
      2. *2: w/ Wireless Charger System
    5. Using an oscilloscope, check the waveform of the ECU.
      NOTE:

      The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

      1. Waveform 1
        GTY1046082Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        MEASUREMENT CONDITION

        Item Content
        Tester Connection A88-15 (NE) - Body ground
        Tool Setting 2 V/DIV., 2 ms./DIV.
        Condition Idling (engine warmed up)

        HINT: 

        The wavelength becomes shorter as the engine speed increases.

      2. Waveform 2
        GTY762053Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        MEASUREMENT CONDITION

        Item Content
        Tester Connection A88-13 (SPD) - H138-29 (E)
        Tool Setting 5 V/DIV., 20 ms./DIV.
        Condition Vehicle being driven at approx. 5 km/h (3 mph)

        HINT: 

        The wavelength becomes shorter as the vehicle speed increases.

      3. Waveform 3
        GTY1043551Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a For 30 seconds after any door closed
        *b After 30 seconds or more have elapsed since any door closed
        MEASUREMENT CONDITION

        Item Content
        Tester Connection H138-4 (CLG5) - H138-29 (E)
        H138-5 (CG5B) - H138-29 (E)
        M106-2 (CG6B) - H138-29 (E)
        M106-10 (CLG7) - H138-29 (E)
        M106-9 (CG7B) - H138-29 (E)
        Tool Setting 5 V/DIV., 500 ms./DIV.
        Condition Procedure:
        1. Ignition switch off
        2. Electrical key transmitter sub-assembly not inside vehicle
        3. Within 30 seconds of closing any door
      4. Waveform 4
        GTY1082671Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a For 30 seconds after any door closed
        *b After 30 seconds or more have elapsed since any door closed
        MEASUREMENT CONDITION

        Item Content
        Tester Connection M106-1 (CLG6) - H138-29 (E)
        Tool Setting 5 V/DIV., 500 ms./DIV.
        Condition Procedure:
        1. Ignition switch off
        2. Electrical key transmitter sub-assembly not inside vehicle
        3. Within 30 seconds of closing any door
      5. Waveform 5
        GTY1081534Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        MEASUREMENT CONDITION

        Item Content
        Tester Connection H138-12 (ANT1) - H138-30 (AGND)
        Tool Setting 5 V/DIV., 200 ms/DIV.
        Condition Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed
      6. Waveform 6
        GTY1082013Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        MEASUREMENT CONDITION

        Item Content
        Tester Connection H138-13 (ANT2) - H138-30 (AGND)
        Tool Setting 20 V/DIV., 200 ms./DIV.
        Condition Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed
  2. CHECK ID CODE BOX (IMMOBILISER CODE ECU) 
    GTY1177656Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the H53 ID code box (immobiliser code ECU) 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 Related Data List Item
      H53-1 (+B) - Body ground Power source Ignition switch off 11 to 14 V -
      H53-5 (GND) - Body ground Ground Always Below 1 Ω
    3. Reconnect the H53 ID code box (immobiliser code ECU) connector.
    4. Measure the voltage and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition Related Data List Item
      H53-3 (EFII) - H53-5 (GND) EFI communication input
      (Signal input from ECM to ID code box (immobiliser code ECU))      		 Ignition switch off 11 to 14 V Smart Key
      1. EFI Code Receive
      H53-3 (EFII) - H53-5 (GND) EFI communication input
      (Signal input from ECM to ID code box (immobiliser code ECU))      		 Within 3 seconds of engine start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery Pulse generation
      (See waveform 1)
      H53-4 (EFIO) - H53-5 (GND) EFI communication output
      (Signal output from ID code box (immobiliser code ECU) to ECM)      		 Ignition switch off Below 1 V
      H53-4 (EFIO) - H53-5 (GND) EFI communication output
      (Signal output from ID code box (immobiliser code ECU) to ECM)      		 Within 3 seconds of engine start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery Pulse generation
      (See waveform 2)
      H53-2 (LIN1) - H53-5 (GND) LIN communication line Ignition switch ON Pulse generation -
    5. Using an oscilloscope, check the waveform.
      NOTE:

      The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

      1. Waveform 1
        GTY367336Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Approximately 160 ms. *b Approximately 270 ms.
        Item Content
        Tester Connection H53-3 (EFII) - H53-5 (GND)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of engine start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery
      2. Waveform 2
        GTY384373Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Approximately 160 ms. *b Approximately 270 ms.
        Item Content
        Tester Connection H53-4 (EFIO) - H53-5 (GND)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of engine start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery
  3. CHECK ECM 
    GTY1180960Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and resistance, and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition Related Data List Item/DTC
      C89-1 (BATT) - A83-9 (E1) +B power supply Ignition switch off 11 to 14 V -
      A83-9 (E1) - Body ground Ground Always Below 1 Ω -
      A83-37 (IMO) - A83-9 (E1) EFI communication input
      (Signal input from ECM to ID code box (immobiliser code ECU))      		 Ignition switch off 11 to 14 V Smart Key 
      • EFI Code Receive
      • Engine Start Request
      A83-37 (IMO) - A83-9 (E1) EFI communication input
      (Signal input from ECM to ID code box (immobiliser code ECU))      		 Within 3 seconds of engine start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery Pulse generation
      (See waveform 1)
      A83-38 (IMI) - A83-9 (E1) EFI communication input
      (Signal output from ID code box (immobiliser code ECU) to ECM)      		 Ignition switch off 1 V or less
      A83-38 (IMI) - A83-9 (E1) EFI communication input
      (Signal output from ID code box (immobiliser code ECU) to ECM)      		 Within 3 seconds of engine start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery Pulse generation
      (See waveform 2)
      A83-19 (NEO) - A83-9 (E1) Engine speed signal Idling (engine warmed up) Pulse generation
      (See waveform 3)      		 Power Source Control 
      1. Engine Condition
      A83-16 (STA) - A83-9 (E1) When starting the engine, this monitors the voltage sent from terminal STAR to the starter relay to judge whether the engine is "being started". Engine is cranking 6 V or higher -
    2. Using an oscilloscope, check the waveform.
      NOTE:

      The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

      1. Waveform 1 (Reference)
        GTY749966Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Approximately 160 ms. *b Approximately 270 ms.
        MEASUREMENT CONDITION

        Item Content
        Tester Connection A83-37 (IMO) - A83-9 (E1)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of engine start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery
      2. Waveform 2 (Reference)
        GTY384373Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Approximately 160 ms. *b Approximately 270 ms.
        MEASUREMENT CONDITION

        Item Content
        Tester Connection A83-38 (IMI) - A83-9 (E1)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of engine start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery
      3. Waveform 3
        GTY1046082Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        MEASUREMENT CONDITION

        Item Content
        Tester Connection A83-19 (NEO) - A83-9 (E1)
        Tool Setting 2 V/DI., 2 ms./DIV.
        Condition Idling (engine warmed up)

        HINT: 

        The wavelength becomes shorter as the engine speed increases.

  4. CHECK ENGINE SWITCH 
    GTY1177648Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the H139 engine switch connector.
    2. Measure the resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition Related Data List Item/DTC
      H139-3 (GND) - Body ground Transponder key amplifier ground Always Below 1 Ω -
    3. Connect the H139 engine switch connector.
    4. Measure the voltage and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition Related Data List Item/DTC
      H139-1 (ANT1) - H139-3 (GND) Signal input / output from transponder key coil (transponder key coil built into engine switch) Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed Pulse generation
      (See waveform 1)      		 Smart Key 
      1. Encrypt Code Difference

        HINT: 

        If immobiliser key code verification communication is not performed correctly, the malfunction may be indicated by one or more of the Data List items listed above
      H139-7 (ANT2) - H139-3 (GND) Signal input / output from transponder key coil (transponder key coil built into engine switch) Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed Pulse generation
      (See waveform 2)
      H139-11 (SS3) - H139-3 (GND) SS3 contact signal
      HINT: 
      Backup for SS1. Behaves the same way as SS1.      		 Engine switch not pushed → Engine switch pushed 9 V or higher → Below 1 V Power Source Control 
      1. Start Switch 3
      H139-6 (SS2) - H139-3 (GND) SS2 contact signal
      HINT: 
      Backup for SS1. Behaves the same way as SS1.      		 Engine switch not pushed → Engine switch pushed 9 V or higher → Below 1 V Power Source Control 
      1. Start Switch 2
      H139-12 (SS1) - H139-3 (GND) SS1 contact signal Engine switch not pushed → Engine switch pushed 9 V or higher → Below 1 V Power Source Control 
      1. Start Switch 1
    5. Using an oscilloscope, check the waveform.
      NOTE:

      The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

      1. Waveform 1 (Reference)
        GTY1043363Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        MEASUREMENT CONDITION

        Item Content
        Tester Connection H139-1 (ANT1) - H139-3 (GND)
        Tool Setting 5 V/DIV., 200 ms/DIV.
        Condition Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed
      2. Waveform 2 (Reference)
        GTY1044475Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        MEASUREMENT CONDITION

        Item Content
        Tester Connection H139-7 (ANT2) - H139-3 (GND)
        Tool Setting 20 V/DIV., 200 ms./DIV.
        Condition Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed
  5. SMART KEY SYSTEM (for Entry Function) 

    Refer to TERMINALS OF ECU [11/2023 - ]

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