Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Toyota >> 2009 >> Tundra Base, 5.7 W >> Repair and Diagnosis >> External Pages >> Different car >> Section 86 (Cruise Control System) >> Dynamic Laser Cruise Control System >> Terminals Of Ecu

Terminals Of Ecu

WARNING: This page is about a different car, the 2008 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DISTANCE CONTROL ECU 
    Fig 1: Identifying A43 Connector Terminal
    G05647255Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    VOLTAGE SPECIFICATION

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    A43-1(B) - A43-12(GND) O-BR Battery Ignition switch ON 11 to 14 V
    A43-8(CANH) - A43-12 (GND) O-BR CAN communication signal CAN communication circuit Pulse generation
    A43-9(CANL) - A43-12 (GND) W-BR CAN communication signal CAN communication circuit Pulse generation
    A43-10(SGND) - Body ground BR - Body ground Ground Always Below 1 Ω
    A43-12 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω
    A43-13(IGB) - A43-12 (GND) L-BR Ignition switch ON signal Ignition switch off Below 1 V
    A43-13(IGB) - A43-12 (GND) L-BR Ignition switch ON signal Ignition switch ON 11 to 14 V
    A43-22(LRDD) - A43-10 (SGND) V-BR Laser radar sensor input signal Ignition switch ON Pulse generation (see  awaveform 1)
    A43-23(LRRD) - A43-10 (SGND) P-BR Laser radar sensor output signal Ignition switch ON Pulse generation (see  bwaveform 2)
    A43-16(MODE) - A43-12 (GND) P-BR Steering pad switch signal (Distance control switch signal) Ignition switch ON, Steering pad switch signal ON Below 2 V
    A43-16(MODE) - A43-12 (GND) P-BR Steering pad switch signal (Distance control switch signal) Ignition switch ON, Steering pad switch signal OFF 11 to 14 V
    1. Using an oscilloscope, check waveform 1.

      Waveform 1 

      WAVEFORM REFERENCE

      Item Content
      Terminal No. (Symbol) A43-22 (LRDD) - A43-10 (SGND)
      Tool Setting 2V/DIV., 10 msec./DIV.
      Condition Ignition switch ON
      Fig 2: Identifying Waveform 1
      G05140630Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using an oscilloscope, check waveform 2.

      Waveform 2 

      WAVEFORM REFERENCE

      Item Content
      Terminal No. (Symbol) A43-23 (LRRD) - A43-10 (SGND)
      Tool Setting 2 V/DIV., 5 msec./DIV.
      Condition Ignition switch ON
      Fig 3: Identifying Waveform 2
      G05140631Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK ECM 
    Fig 4: Identifying D56 And A27 Connector Terminal
    G05647258Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    VOLTAGE SPECIFICATION

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    A27-26 (STP) - D56-81 (E1) G-W - BR Stop light signal Brake pedal released (Stop light switch off) Below 1 V
    A27-26(STP) - D56-1(E1) G-W - BR Stop light signal Brake pedal depressed (Stop light switch on) 11 to 14 V
    A27-35(ST1-) - D56-81 (E1) R-BR Stop light signal Ignition switch ON, Brake pedal depressed (Stop light switch on) Below 1 V
    A27-35(ST1-) - D56-81 (E1) R-BR Stop light signal Ignition switch ON, Brake pedal released (Stop light switch off) 11 to 14 V
    A27-16(TC) - D56-81(E1) R-BR Terminal TC of DLC3 Ignition switch ON 11 to 14 V
    A27-16(TC) - D56-81(E1) R-BR Terminal TC of DLC3 Connect terminals TC and CG of DLC3 Below 1 V
    A27-44 (LGND) - Body ground GR - Body ground Ground Always Below 1 Ω
    A27-45 (CCS) - D56-81 (E1) BR-BR Cruise control main switch signal Ignition switch ON 11 to 14 V
    A27-45 (CCS) - D56-81 (E1) BR-BR Cruise control main switch signal CANCEL switch on 6.6 to 10.1 V
    A27-45 (CCS) - D56-81 (E1) BR-BR Cruise control main switch signal - (COAST)/SET switch on 4.5 to 7.1 V
    A27-45 (CCS) - D56-81 (E1) BR-BR Cruise control main switch signal + (ACCEL)/RES (RESUME) switch on 2.3 to 4.0 V
    A27-45 (CCS) - D56-81 (E1) BR-BR Cruise control main switch signal Main switch on Below 1 V
    A27-37 (CCHG) - D56-81 (E1) L-BR Distance control switch signal Ignition switch ON, Cruise control main switch on, MODE switch on Below 1 V
    A27-37 (CCHG) - D56-81 (E1) L-BR Distance control switch signal Ignition switch ON, Cruise control main switch on, MODE switch off 11 to 14 V
    D56-81 (E1) - Body ground BR - Body ground Ground Always Below 1 Ω
  3. CHECK LASER RADAR SENSOR 
    Fig 5: Identifying A26 Connector Terminal
    G05647259Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    WAVEFORM REFERENCE

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    A26-1 (LGND) - Body ground GR - Body ground Ground (Distance signal) Always Below 1 Ω
    A26-2 (SGND) - Body ground BR - Body ground Ground Always Below 1 Ω
    A26-3 (LRDD) - A26-2 (SGND) V-BR Laser radar sensor output signal Ignition switch ON Pulse generation (see  awaveform 1)
    A26-4 (LRRD) - A26-2 (SGND) P-BR Laser radar sensor input signal Ignition switch ON Pulse generation (see  bwaveform 2)
    A26-5 (IGB) - A26-2 (SGND) L-BR Power source Ignition switch ON 11 to 14 V
    1. Using an oscilloscope, check waveform 1.

      Waveform 1 

      WAVEFORM REFERENCE

      Item Content
      Terminal No. (Symbol) A26-3 (LRDD) - A26-2 (SGND)
      Tool Setting 2V/DIV., 10 msec./DIV.
      Condition Ignition switch ON
      Fig 6: Identifying A19 Connector Terminal
      G05647260Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using an oscilloscope, check waveform 2.

      Waveform 2 

      WAVEFORM REFERENCE

      Item Content
      Terminal No. (Symbol) A26-4 (LRRD) - A26-2 (SGND)
      Tool Setting 2 V/DIV., 5 msec./DIV.
      Condition Ignition switch ON
      Fig 7: Identifying Waveform 1
      G05140631Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) 
    Fig 8: Identifying Waveform 2
    G05647262Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    VOLTAGE SPECIFICATION

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    A19-8 (BZ) - Body ground Y - Body ground Skid control buzzer circuit Ignition switch ON Skid control buzzer is sounded Below 1 V ←→ 11 to 14 V
    Ignition switch ON Skid control buzzer is not sounded 11 to 14 V
    A19-2 (STPO) - Body ground BR - Body ground Stop light control relay output signal Ignition switch ON 11 to 14 V
    A19-11 (STP2) - Body ground GR - Body ground Stop light control relay input signal Brake pedal released (Stop light switch OFF) Below 1.0 V
    Brake pedal depressed (Stop light switch ON) 11 to 14 V
    A19-41 (STP) - Body ground Y - Body ground Stop light switch input signal Brake pedal released (Stop light switch OFF) Below 1.0 V
    Brake pedal depressed (Stop light switch ON) 11 to 14 V
scientia non olet · About Mike's Workshop Manuals