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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 26 (Electronically Controlled Brake System (HV) - Diagnostics - Introduction (1 Of 2)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> Data List / Active Test [12/2019 - 11/2023] >> Data List / Active Test [12/2019 - 11/2023]

Data List / Active Test [12/2019 - 11/2023]

WARNING: This page is about a different variant/trim than selected.
  1. DATA LIST 
    NOTE:

    In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

    HINT: 

    Using the GTS to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

    1. Warm up the engine.
    2. Turn the ignition switch off.
    3. Connect the GTS to the DLC3.
    4. Turn the ignition switch to ON.
    5. Turn the GTS on.
    6. Enter the following menus: Chassis / Brake Booster / Data List.
    7. Enter the following menus: Chassis / Brake/EPB* / Data List.

      *: Electric Parking Brake System

    8. According to the display on the GTS, read the Data List.

      Chassis > Brake Booster > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Total Distance Traveled - Unit Total Distance Traveled unit km / mile - -
      Total Distance Traveled Total distance traveled Min.: 0
      Max.: 16777215      		 - -
      Elapsed Time Time elapsed after ignition switch turned to ON Min.: 0.000 s
      Max.: 100661.760 s      		 - -
      IG Switch Ignition switch ON status OFF / ON - -
      Stop Light SW Stop light switch assembly (STP terminal input) OFF / ON OFF: Brake pedal released
      ON: Brake pedal depressed      		 HINT: 
      The brake pedal state is determined using the voltage at terminal STP
      Parking Brake SW Parking brake status OFF / ON OFF: Parking brake released
      ON: Parking brake applied      		 -
      Operation History of IG OFF while Vehicle is moving History of ignition switch turned off when vehicle is in motion OFF / ON OFF: No history
      ON: History of ignition switch turned off with vehicle speed 3 km/h (2 mph) or higher      		 -
      Buzzer Meter buzzer OFF / ON OFF: Buzzer off
      ON: Buzzer on      		 -
      Dealer Mode Dealer Mode (Signal Check mode or Calibration mode) status OFF / ON OFF: Normal mode
      ON: Dealer Mode (Signal Check mode or Calibration mode)      		 HINT: 
      • For details on Dealer Mode (Signal Check), refer to Test Mode procedure*1
      • For details on Dealer Mode (Calibration), refer to utility*2
      Reservoir Warning SW Brake fluid level warning switch OFF / ON OFF: Reservoir level normal
      ON: Reservoir level low      		 -
      ECB Motor Relay Motor relay operation request OFF / ON OFF: Relay off
      ON: Relay on      		 ECB: Electronically Controlled Brake System
      ECB Solenoid (SGH) Switching solenoid valve (SGH) OFF / ON OFF: Solenoid off
      ON: Solenoid on      		 ECB: Electronically Controlled Brake System
      ECB Solenoid (SSA) Switching solenoid valve (SSA) OFF / ON OFF: Solenoid off
      ON: Solenoid on      		 ECB: Electronically Controlled Brake System
      Reaction Force Pressure Pressure value of stroke simulator Min.: 0.00 MPa
      Max.: 24.48 MPa      		 Brake pedal released: 0.00 to 1.53 MPa Brake pedal is being depressed: Changes in proportion to the depression force of the brake pedal
      Reaction Force Pressure Sensor Temperature Reaction force pressure sensor temperature Min.: -80°C (-112°F)
      Max.: 175°C (347°F)      		 Current reaction force pressure sensor temperature -
      Stroke Sensor Brake pedal stroke sensor 1 Min.: 0.0 V
      Max.: 5.0 V      		 Brake pedal released: 0.6 to 1.4 V Reading increases when brake pedal is depressed
      Quantity of Brake Pedal Stroke Brake pedal stroke amount Min.: 0 mm
      Max.: 255 mm      		 Brake pedal released: 0 mm Reading increases when brake pedal is depressed
      Servo Pressure Pressure value of servo Min.: 0.00 MPa
      Max.: 24.48 MPa      		 Brake pedal released: 0.00 to 1.53 MPa Brake pedal is being depressed: Changes in proportion to the depression force of the brake pedal
      Servo Pressure Sensor Temperature Servo pressure sensor temperature Min.: -80°C (-112°F)
      Max.: 175°C (347°F)      		 Current servo pressure sensor temperature -
      Accumulator Pressure Accumulator pressure output value Min.: 0.00 MPa
      Max.: 24.48 MPa      		 15.00 to 21.00 MPa (Pressure stable and pump motor stopped) When brake fluid is stored in the accumulator: Accumulator pressure changes in accordance with volume of fluid stored in the accumulator
      Accumulator Pressure Sensor Temperature Accumulator pressure sensor temperature Min.: -80°C (-112°F)
      Max.: 175°C (347°F)      		 Current accumulator pressure sensor temperature -
      Voltage of Stroke Sensor Voltage of brake pedal stroke sensor 1 Min.: 0.0 V
      Max.: 5.0 V      		 - -
      Brake Pedal Stroke Change Speed Brake pedal stroke rate of change Min.: -2560 mm/s
      Max.: 2540 mm/s      		 Brake pedal released or depressed and held: 0 mm/s Brake pedal is being moved: Changes in proportion to the operation speed of the brake pedal
      Reaction Force Oil Pressure Change Speed Reaction force pressure rate of change Min.: -30 MPa/s
      Max.: 225 MPa/s      		 - -
      Target Oil Pressure Wheel target hydraulic pressure Min.: 0.00 MPa
      Max.: 20.00 MPa      		 - Changes according to the target wheel cylinder hydraulic pressure
      VCSK Voltage Value VCSK voltage value Min.: 0.000 V
      Max.: 5.500 V      		 4.800 to 5.200 V -
      SLA Solenoid Current Linear solenoid addition valve (SLA) current Min.: 0.000 A
      Max.: 1.500 A      		 Brake pedal released: 0.000 A -
      SLR Solenoid Current Linear solenoid reduction valve (SLR) current Min.: 0.000 A
      Max.: 1.500 A      		 Brake pedal released: 0.000 A -
      SGH Solenoid Current Switching solenoid valve (SGH) current Min.: 0.000 A
      Max.: 3.000 A      		 0.000 to 1.500 A -
      SSA Solenoid Current Switching solenoid valve (SSA) current Min.: 0.000 A
      Max.: 3.000 A      		 0.000 to 1.500 A -
      ECB Main Relay Main relay operation request OFF / ON OFF: Relay off
      ON: Relay on      		 ECB: Electronically Controlled Brake System
      BS (linear) Voltage BS voltage value
      (for SLA, SLR)      		 Min.: 0.000 V
      Max.: 20.000 V      		 - Changes in proportion to auxiliary battery voltage
      BS (ABS) Voltage BS voltage value
      (for SGH, SSA)      		 Min.: 0.000 V
      Max.: 20.000 V      		 - Changes in proportion to auxiliary battery voltage
      IG1 Voltage IG1 voltage value Min.: 0.000 V
      Max.: 20.000 V      		 - Changes in proportion to auxiliary battery voltage
      IG2 Voltage IG2 voltage value Min.: 0.000 V
      Max.: 20.000 V      		 - Changes in proportion to auxiliary battery voltage
      BI Voltage +BI voltage value Min.: 0.000 V
      Max.: 20.000 V      		 - Changes in proportion to auxiliary battery voltage
      BS Voltage BS voltage value Min.: 0.000 V
      Max.: 20.000 V      		 - Changes in proportion to auxiliary battery voltage
      1. *1: for performing Dealer Mode (Signal Check): Refer to TEST MODE PROCEDURE [12/2019 - 11/2023] 

        *2: for entering Dealer Mode (Calibration): Refer to UTILITY [12/2019 - 11/2023] 

      Chassis > Brake/EPB > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Total Distance Traveled - Unit Total Distance Traveled unit km / mile - -
      Total Distance Traveled Total distance traveled Min.: 0
      Max.: 16777215      		 - -
      FR Wheel Speed Front wheel speed sensor RH reading Min.: 0.0 km/h (0 mph)
      Max.: 6553.5 km/h (4072 mph)      		 Vehicle stopped: 0.0 km/h (0 mph) When driving at constant speed: No large fluctuations
      FL Wheel Speed Front wheel speed sensor LH reading Min.: 0.0 km/h (0 mph)
      Max.: 6553.5 km/h (4072 mph)      		 Vehicle stopped: 0.0 km/h (0 mph) When driving at constant speed: No large fluctuations
      RR Wheel Speed Rear wheel speed sensor RH reading Min.: 0.0 km/h (0 mph)
      Max.: 6553.5 km/h (4072 mph)      		 Vehicle stopped: 0.0 km/h (0 mph) When driving at constant speed: No large fluctuations
      RL Wheel Speed Rear wheel speed sensor LH reading Min.: 0.0 km/h (0 mph)
      Max.: 6553.5 km/h (4072 mph)      		 Vehicle stopped: 0.0 km/h (0 mph) When driving at constant speed: No large fluctuations
      FR Wheel Acceleration Front wheel RH acceleration Min.: -200.840 m/s2
      Max.: 199.271 m/s2      		 - During deceleration/acceleration: Changes continuously
      FL Wheel Acceleration Front wheel LH acceleration Min.: -200.840 m/s2
      Max.: 199.271 m/s2      		 - During deceleration/acceleration: Changes continuously
      RR Wheel Acceleration Rear wheel RH acceleration Min.: -200.840 m/s2
      Max.: 199.271 m/s2      		 - During deceleration/acceleration: Changes continuously
      RL Wheel Acceleration Rear wheel LH acceleration Min.: -200.840 m/s2
      Max.: 199.271 m/s2      		 - During deceleration/acceleration: Changes continuously
      Master Cylinder Sensor 1 Master cylinder pressure sensor pressure (value detected by ECU) Min.: -1.00 MPa
      Max.: 23.99 MPa      		 Brake pedal released: -1.00 to 0.00 MPa Reading increases when brake pedal is depressed
      Zero Point of M/C Memorized zero point value of master cylinder pressure sensor Min.: -12.5 MPa
      Max.: 12.4 MPa      		 - -
      Master Cylinder Sensor Temperature Master cylinder pressure sensor temperature Min.: -80°C (-112°F)
      Max.: 175°C (347°F)      		 Current master cylinder pressure sensor temperature -
      M/C Sensor Grade Master cylinder pressure sensor change (value detected by ECU) Min.: -30 MPa/s
      Max.: 225 MPa/s      		 Brake pedal released or pedal held at constant position: 0 MPa/s When brake pedal is being operated: Changes in proportion with the pedal movement speed
      Lateral G Lateral G Min.: -25.105 m/s2
      Max.: 24.908 m/s2      		 Turning right: -25.105 to 0.000 m/s2
      Turning left: 0.000 to 24.908 m/s2      		 During turning: Changes in proportion with lateral acceleration
      Forward and Rearward G Forward and rearward G Min.: -25.105 m/s2
      Max.: 24.908 m/s2      		 During deceleration: -25.105 to 0.000 m/s2
      During acceleration: 0.000 to 24.908 m/s2      		 During acceleration/deceleration: Changes in proportion with acceleration
      Zero Point of Decele2 Memorized zero point value of lateral G Min.: -25.105 m/s2
      Max.: 24.908 m/s2      		 - -
      Zero Point of Decele Memorized zero point value of forward and rearward G Min.: -25.105 m/s2
      Max.: 24.908 m/s2      		 - -
      Yaw Rate Sensor Value Yaw rate sensor Min.: -128°/s
      Max.: 127°/s      		 Vehicle stopped: 0°/s
      Turning right: -128 to 0°/s
      Turning left: 0 to 127°/s      		 -
      Zero Point of Yaw Rate Sensor Memorized zero point value of yaw rate sensor 1 Min.: -128°/s
      Max.: 127°/s      		 After completing zero point calibration: 0° -
      Zero Point of Yaw Rate Sensor2 Memorized zero point value of yaw rate sensor 2 Min.: -128°/s
      Max.: 127°/s      		 After completing zero point calibration: 0° -
      Steering Angle Value Steering angle sensor Min.: -3276.8°
      Max.: 3276.7°      		 Turning left: 0.0 to 3276.7°
      Turning right: -3276.8 to 0.0°      		 -
      Zero Point of Steering Angle Memorized zero point value of steering angle sensor Min.: -3276.8°
      Max.: 3276.7°      		 - -
      MT Voltage Value ABS motor drive voltage value Min.: 0.0 V
      Max.: 25.5 V      		 - Changes in proportion to auxiliary battery voltage
      HINT: 
      This is the voltage downstream of the ABS motor as monitored by the No. 2 skid control ECU
      Solenoid Power Supply Voltage Solenoid power supply voltage value Min.: 0.0 V
      Max.: 25.5 V      		 - Changes in proportion to auxiliary battery voltage
      HINT: 
      This is the voltage output (which supplies power to each solenoid) from the No. 2 skid control ECU (brake actuator assembly) to the ABS solenoid relay
      Vehicle Speed Vehicle speed
      (Vehicle speed signal output to combination meter assembly)      		 Min.: 0.0 km/h (0 mph)
      Max.: 6553.5 km/h (4072 mph)      		 Vehicle stopped: 0.0 km/h (0 mph) When driving at constant speed: No large fluctuations
      Accelerator Opening Angle % Percentage of accelerator pedal opening angle Min.: 0.0%
      Max.: 127.5%      		 Accelerator pedal released: 0.0% During accelerator pedal operation: Changes in proportion with the pedal movement
      Shift Lever Position Shift lever position information fail / 1st / 2nd / 3rd / 4th / 5th / 6th / B / D/M / N / P / R / No input Actual shift lever position -
      TRC (TRAC)/VSC OFF Mode TRAC/VSC off mode Normal mode (TRC (TRAC) ON/VSC ON) / TRC (TRAC) OFF mode (TRC (TRAC) OFF/VSC ON) / VSC expert mode (VSC expert mode MID ON) / VSC OFF mode (TRC (TRAC) OFF/VSC OFF) Normal mode (TRC (TRAC) ON/VSC ON): Normal mode
      TRC (TRAC) OFF mode (TRC (TRAC) OFF/VSC ON): TRAC off mode
      VSC expert mode (VSC expert mode MID ON): VSC expert mode
      VSC OFF mode (TRC (TRAC) OFF/VSC OFF): VSC off mode      		 -
      Brake Hold Control Mode Brake hold control mode Out of control mode / Pressure hold mode / Pressure release mode / EPB lock mode Out of control mode: Brake hold control system is off or brake hold control system is stand-by mode (brake hold standby indicator light is illuminated)
      Pressure hold mode: Brake hold control is operating (brake hold operated indicator light is illuminated)
      Pressure release mode: Brake hold control is released (brake hold operated indicator light not illuminated)
      EPB lock mode: Parking brake is engaged during brake hold control      		 HINT: 
      • EPB: Electric Parking Brake System
      • If the brake pedal is not depressed for 3 minutes or more after entering pressure hold mode, the system automatically changes to EPB lock mode
      FR Target Oil Pressure Front wheel RH target oil pressure Min.: 0.0 MPa
      Max.: 20.0 MPa      		 - Different according to target oil pressure of each wheel
      FL Target Oil Pressure Front wheel LH target oil pressure Min.: 0.0 MPa
      Max.: 20.0 MPa      		 - Different according to target oil pressure of each wheel
      RR Target Oil Pressure Rear wheel RH target oil pressure Min.: 0.0 MPa
      Max.: 20.0 MPa      		 - Different according to target oil pressure of each wheel
      RL Target Oil Pressure Rear wheel LH target oil pressure Min.: 0.0 MPa
      Max.: 20.0 MPa      		 - Different according to target oil pressure of each wheel
      Vehicle Speed Grade Vehicle acceleration/deceleration Min.: -25.105 m/s2
      Max.: 24.908 m/s2      		 Vehicle stopped: 0.000 m/s2
      During deceleration: -25.105 to 0.000 m/s2
      During acceleration: 0.000 to 24.908 m/s2      		 During driving: Changes in proportion with vehicle acceleration/deceleration
      Vehicle Stop Time from IG ON Time vehicle stopped after ignition switch turned to ON Min.: 0 s
      Max.: 1275 s      		 - -
      Travel Distance from IG ON Driving time after ignition switch turned to ON Min.: 0 s
      Max.: 1275 s      		 - -
      Elapsed Time Time elapsed after ignition switch turned to ON Min.: 0.000 s
      Max.: 100661.760 s      		 - -
      IG Switch Ignition switch ON status OFF / ON - -
      Stop Light SW Stop light switch assembly status
      (STP or STP2 terminal input)      		 OFF / ON OFF: Brake pedal released
      ON: Brake pedal depressed      		 HINT: 
      • Stop light control relay off: STP terminal status displayed.
      • Stop light control relay on: STP2 terminal status displayed.
      Parking Brake SW Parking brake status OFF / ON OFF: Parking brake released
      ON: Parking brake applied      		 -
      Brake Hold Switch Brake hold switch (electric parking brake switch assembly) (PKB terminal input) OFF / ON OFF: Brake hold switch (electric parking brake switch assembly) OFF
      ON: Brake hold switch (electric parking brake switch assembly) ON      		 HINT: 
      The brake hold switch (electric parking brake switch assembly) state is determined using the voltage at terminal PKB
      Stop Light Relay Stop light control relay (Stop light switch assembly) status
      (STP terminal input)      		 OFF / ON OFF: Stop light control relay (Stop light switch assembly) off and brake pedal released
      ON: Stop light control relay (Stop light switch assembly) on or brake pedal depressed      		 HINT: 
      The voltage of power supplied to the stop lights is measured at the STP terminal.
      Inspection Mode Inspection mode OFF / ON OFF: Normal mode
      ON: Inspection mode      		 -
      TRC (TRAC) Control TRAC control status Out of controlling / Under Controlling Out of controlling: During not control
      Under Controlling: During control      		 -
      TRC (TRAC) Engine Control TRAC engine control status Out of controlling / Under Controlling Out of controlling: During not control
      Under Controlling: During control      		 -
      TRC (TRAC) Brake Control TRAC brake control status Out of controlling / Under Controlling Out of controlling: During not control
      Under Controlling: During control      		 -
      FR Wheel VSC Ctrl Status Front wheel RH VSC control status Out of controlling / Under Controlling Out of controlling: During not control
      Under Controlling: During control      		 -
      FL Wheel VSC Ctrl Status Front wheel LH VSC control status Out of controlling / Under Controlling Out of controlling: During not control
      Under Controlling: During control      		 -
      RR Wheel VSC Ctrl Status Rear wheel RH VSC control status Out of controlling / Under Controlling Out of controlling: During not control
      Under Controlling: During control      		 -
      RL Wheel VSC Ctrl Status Rear wheel LH VSC control status Out of controlling / Under Controlling Out of controlling: During not control
      Under Controlling: During control      		 -
      FR Wheel ABS Ctrl Status Front wheel RH ABS control status Out of controlling / Under Controlling Out of controlling: During not control
      Under Controlling: During control      		 -
      FL Wheel ABS Ctrl Status Front wheel LH ABS control status Out of controlling / Under Controlling Out of controlling: During not control
      Under Controlling: During control      		 -
      RR Wheel ABS Ctrl Status Rear wheel RH ABS control status Out of controlling / Under Controlling Out of controlling: During not control
      Under Controlling: During control      		 -
      RL Wheel ABS Ctrl Status Rear wheel LH ABS control status Out of controlling / Under Controlling Out of controlling: During not control
      Under Controlling: During control      		 -
      BA Ctrl Status BA control status OFF / ON OFF: During not control
      ON: During control      		 -
      PBA Ctrl Status PBA control status OFF / ON OFF: During not control
      ON: During control      		 -
      Stop Light Relay State for ECU Control Stop light control relay (Stop light switch assembly) status (STPO terminal output) (for ECU control) OFF / ON OFF: Stop light control relay (Stop light switch assembly) off (Stop light off)
      ON: Stop light control relay (Stop light switch assembly) on (Stop light on)      		 -
      Solenoid State for ECU Control ABS solenoid relay status (for ECU control) OFF / ON OFF: ABS solenoid relay not operating
      ON: ABS solenoid relay operating      		 -
      Motor State for ECU Control ABS motor relay status (for ECU control) OFF / ON OFF: ABS motor relay not operating
      ON: ABS motor relay operating      		 -
      Operation History of IG OFF while Vehicle is moving History of ignition switch turned off when vehicle is in motion OFF / ON OFF: No history
      ON: History of ignition switch turned off with vehicle speed 3 km/h (2 mph) or higher      		 -
      Buzzer Meter buzzer OFF / ON OFF: Buzzer off
      ON: Buzzer on      		 -
      Dealer Mode Dealer Mode (Signal Check mode or Calibration mode) status OFF / ON OFF: Normal mode
      ON: Dealer Mode (Signal Check mode or Calibration mode)      		 HINT: 
      • For details on Dealer Mode (Signal Check), refer to Test Mode procedure*1
      • For details on Dealer Mode (Calibration), refer to utility*2
      Zero Point Memory State of Steering Angle Sensor Steering angle sensor zero point memorization status Zero point is not memorized / Zero point is memorized - HINT: 
      The steering angle sensor zero point is acquired when the vehicle is being driven in a straight line at a speed of 35 km/h (22 mph) or more for approximately 5 seconds
      Regenerative Cooperation Regenerative cooperation OFF / ON OFF: Not operating
      ON: Operating      		 -
      TRC (TRAC)/VSC OFF SW VSC OFF switch (CSW terminal input) OFF / ON OFF: VSC OFF switch OFF
      ON: VSC OFF switch ON      		 HINT: 
      The VSC OFF switch state is determined using the voltage at terminal CSW
      Brake Hold Ready Brake hold control permission status Not in stand-by mode / Stand-by mode Not in stand-by mode: Brake hold function not operating (brake hold standby indicator light not illuminated)
      Stand-by mode: Brake hold function stand-by state (brake hold standby indicator light illuminated)      		 -
      Stroke Sensor2 Brake pedal stroke sensor 2 Min.: 0.0 V
      Max.: 5.0 V      		 Brake pedal released: 3.6 to 4.4 V Reading decreases when brake pedal is depressed
      Quantity of Brake Pedal Stroke Brake pedal stroke amount Min.: 0 mm
      Max.: 255 mm      		 Brake pedal released: 0 mm Reading increases when brake pedal is depressed
      Voltage of Stroke Sensor2 Voltage of brake pedal stroke sensor 2 Min.: 0.0 V
      Max.: 5.0 V      		 - -
      FR Regenerative Request FR regenerative request torque Min.: 0 Nm
      Max.: 1048560 Nm      		 - Changes according to brake pedal force (When depressing the brake pedal lightly after reaching 30 km/h (19 mph) or more, avoiding sudden braking.)
      FR Regenerative Operation FR regenerative operation torque Min.: 0 Nm
      Max.: 1048560 Nm      		 - Changes according to brake pedal force (When depressing the brake pedal lightly after reaching 30 km/h (19 mph) or more, avoiding sudden braking.)
      Brake Pedal Stroke Change Speed Brake pedal stroke rate of change Min.: -2560 mm/s
      Max.: 2540 mm/s      		 Brake pedal released or depressed and held: 0 mm/s Brake pedal is being moved: Changes in proportion to the operation speed of the brake pedal
      VCSK Voltage Value VSK2 voltage value Min.: 0.000 V
      Max.: 5.500 V      		 4.800 to 5.200 V -
      ABS Solenoid (SRLR) Rear pressure reduction solenoid LH status OFF / ON OFF: Not operating
      ON: Operating (pressure reduction)      		 HINT: 
      The solenoid valve controls the brake fluid pressure of the wheel cylinder of the vehicle
      ABS Solenoid (SRLH) Rear pressure holding solenoid LH status OFF / ON OFF: Not operating
      ON: Operating (pressure holding)      		 HINT: 
      The solenoid valve controls the brake fluid pressure of the wheel cylinder of the vehicle
      ABS Solenoid (SRRR) Rear pressure reduction solenoid RH status OFF / ON OFF: Not operating
      ON: Operating (pressure reduction)      		 HINT: 
      The solenoid valve controls the brake fluid pressure of the wheel cylinder of the vehicle
      ABS Solenoid (SRRH) Rear pressure holding solenoid RH status OFF / ON OFF: Not operating
      ON: Operating (pressure holding)      		 HINT: 
      The solenoid valve controls the brake fluid pressure of the wheel cylinder of the vehicle
      ABS Solenoid (SFLR) Front pressure reduction solenoid LH status OFF / ON OFF: Not operating
      ON: Operating (pressure reduction)      		 HINT: 
      The solenoid valve controls the brake fluid pressure of the wheel cylinder of the vehicle
      ABS Solenoid (SFLH) Front pressure holding solenoid LH status OFF / ON OFF: Not operating
      ON: Operating (pressure holding)      		 HINT: 
      The solenoid valve controls the brake fluid pressure of the wheel cylinder of the vehicle
      ABS Solenoid (SFRR) Front pressure reduction solenoid RH status OFF / ON OFF: Not operating
      ON: Operating (pressure reduction)      		 HINT: 
      The solenoid valve controls the brake fluid pressure of the wheel cylinder of the vehicle
      ABS Solenoid (SFRH) Front pressure holding solenoid RH status OFF / ON OFF: Not operating
      ON: Operating (pressure holding)      		 HINT: 
      The solenoid valve controls the brake fluid pressure of the wheel cylinder of the vehicle
      TRC (TRAC)/VSC Solenoid (SM2) Master cylinder cut solenoid (Brake Pressure Control Solenoid "B") status OFF / ON OFF: Not operating
      ON: Operating (pressure regulation)      		 HINT: 
      Depending on the operating conditions, the master cylinder cut solenoid valves regulate the brake fluid pressure generated by the pump motor
      TRC (TRAC)/VSC Solenoid (SM1) Master cylinder cut solenoid (Brake Pressure Control Solenoid "A") status OFF / ON OFF: Not operating
      ON: Operating (pressure regulation)      		 HINT: 
      Depending on the operating conditions, the master cylinder cut solenoid valves regulate the brake fluid pressure generated by the pump motor
      ABS Motor Relay Motor relay OFF / ON OFF: Motor relay off
      ON: Motor relay on      		 -
      Solenoid Relay Solenoid relay OFF / ON OFF: Solenoid relay off
      ON: Solenoid relay on      		 -
      STPO Stop light control relay (Stop light switch assembly) status
      (STPO terminal output)      		 OFF / ON OFF: Stop light control relay (Stop light switch assembly) off (Stop light off)
      ON: Stop light control relay (Stop light switch assembly) on (Stop light on)      		 HINT: 
      When STPO is ON, the stop light control relay (stop light switch assembly) turns ON and the stop lights illuminate
      IG1 Voltage IG1 voltage value Min.: 0.000 V
      Max.: 20.000 V      		 - Changes in proportion to auxiliary battery voltage
      IG2 Voltage IG2 voltage value Min.: 0.000 V
      Max.: 20.000 V      		 - Changes in proportion to auxiliary battery voltage
      BS Voltage +BS voltage value Min.: 0.000 V
      Max.: 20.000 V      		 - Changes in proportion to auxiliary battery voltage
      BM Voltage BM voltage value Min.: 0.000 V
      Max.: 20.000 V      		 - Changes in proportion to auxiliary battery voltage
      1. *1: for performing Dealer Mode (Signal Check): Refer to TEST MODE PROCEDURE [12/2019 - 11/2023] 

        *2: for entering Dealer Mode (Calibration): Refer to UTILITY [12/2019 - 11/2023] 

  2. CHECK FOR INTERMITTENT PROBLEMS 

    HINT: 

    A momentary interruption (open circuit) in the connectors and/or wire harnesses between the sensors and ECUs can be detected using the Data List function of the GTS.

    1. Turn the ignition switch off.
    2. Connect the GTS to the DLC3.
    3. Turn the ignition switch to ON.
    4. Turn the GTS on.
    5. Enter the following menus: Chassis / Brake Booster / Data List.
    6. Enter the following menus: Chassis / Brake/EPB* / Data List.

      *: Electric Parking Brake System

    7. Follow the directions on the GTS to display the Data List and select areas where momentary interruptions should be monitored.

      HINT: 

      A momentary interruption (open circuit) cannot be detected for 3 seconds after the ignition switch is turned to ON (initial check).

      Chassis > Brake Booster > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Stop Switch Open Momentary interruption (open circuit) status in wire harness between No. 1 skid control ECU (brake booster with master cylinder assembly) and stop light switch assembly status Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      Stroke Open Brake pedal stroke sensor 1 open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      Accumulator Open Accumulator pressure sensor open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      Reaction Force Pressure Sensor Open Reaction force pressure sensor open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      Servo Pressure Sensor Open Servo pressure sensor open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -

      Chassis > Brake/EPB > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FR Speed Open Front speed sensor RH open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      FL Speed Open Front speed sensor LH open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      RR Speed Open Rear speed sensor RH open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      RL Speed Open Rear speed sensor LH open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      Yaw Rate Open Yaw rate sensor open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      Deceleration Open Acceleration sensor open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      Steering Open Steering angle sensor open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      Master Cylinder Open Master cylinder pressure sensor open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      FR Speed Sensor Voltage Open Front speed sensor RH voltage open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      FL Speed Sensor Voltage Open Front speed sensor LH voltage open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      RR Speed Sensor Voltage Open Rear speed sensor RH voltage open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      RL Speed Sensor Voltage Open Rear speed sensor LH voltage open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      M/C Pressure Sensor Noise Master cylinder pressure sensor noise detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      Yaw Rate Sensor Voltage Open Yaw rate sensor voltage open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      Master Cylinder Pressure Sensor Power Supply Open Master cylinder pressure sensor power supply voltage status Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      Solenoid Power Supply Open Solenoid power supply voltage status Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      Motor Power Supply Open Motor power supply voltage status Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      Stop Switch Open Momentary interruption (open circuit) status in wire harness between No. 2 skid control ECU (brake actuator assembly) and stop light switch assembly status Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      Air Bag ECU Communication Open Airbag sensor assembly open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      Stroke2 Open Brake pedal stroke sensor 2 open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
      HV Communication Open Hybrid vehicle communication open detection Normal / Under intermittent Normal: Normal
      Under intermittent: Momentary interruption      		 -
    8. Push the line graph button to display the line graph.
    9. Check for intermittent shorts, etc.

      OK

      Normal is displayed.

      HINT: 

      If "Under intermittent" remains displayed on the GTS, measure the resistance between the skid control ECU and each sensor, hybrid vehicle control ECU or airbag sensor assembly.

    10. While observing the screen, gently jiggle the connectors or wire harnesses between the ECUs and sensors, or between ECUs.

      OK

      Normal is displayed.

      HINT: 

      • If a momentary interruption occurs and Under intermittent is displayed on the GTS, Under intermittent will remain displayed on the GTS for 1 second after the circuit returns to normal.
        GTY884909Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • If the display changes, this indicates that there has been a momentary interruption (open circuit) in the connector and/or wire harness. In this case, repair or replace the connectors and/or wire harnesses as one of them is faulty.
  3. ACTIVE TEST 

    HINT: 

    Using the GTS to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

    1. Warm up the engine.
    2. Turn the ignition switch off.
    3. Connect the GTS to the DLC3.
    4. Turn the ignition switch to ON.
    5. Turn the GTS on.
    6. Enter the following menus: Chassis / Brake Booster / Active Test.
    7. Enter the following menus: Chassis / Brake/EPB* / Active Test.

      *: Electric Parking Brake System

    8. According to the display on the GTS, perform the Active Test.
      NOTE:
      • Although the Active Test automatically turns off the actuator after approximately 5 seconds in order to protect the actuator, do not operate the actuator repeatedly without sufficient waiting time in between.
      • To protect the solenoids, do not operate the solenoids repeatedly without sufficient waiting time in between.
      • Do not depress the brake pedal when only the pressure release solenoids valves are ON.
      • Do not operate more than one solenoid at the same time, except for when operating the pressure hold solenoid and pressure release solenoid of the same wheel.

      Chassis > Brake Booster > Active Test 

      Tester Display Measurement Item Control Range Restrict Condition Diagnostic Note
      ECB Solenoid Switching solenoid (SSA, SGH) Solenoid Start (Activate)
      Solenoid SSA / SGH      		 Vehicle condition:
      • Vehicle stopped
      • Shift lever is in P or N
      • Apply the parking brake

      HINT: 
      To protect actuator and Solenoid(s), this test will continue for 25 seconds.
      • Check that the GTS display for the solenoid (SSA or SGH) changes to ON/OFF during Solenoid Start (Activate)
      • ECB: Electronically Controlled Brake System
      ECB Main Relay Main relay OFF / ON Vehicle condition: Vehicle stopped
      HINT: 
      To protect this Actuator and Solenoid, this test will only last 5 seconds.      		 ECB: Electronically Controlled Brake System
      ECB Solenoid (SLR) Linear solenoid reduction valve (SLR) Solenoid Start (Activate)
      Solenoid SLR
      (It is possible to set the current)      		 Vehicle condition:
      • Vehicle stopped
      • Shift lever is in P
      • Apply the parking brake
      		 ECB: Electronically Controlled Brake System
      ECB Solenoid (SLA) Linear solenoid addition valve (SLA) Solenoid Start (Activate)
      Solenoid SLA
      (It is possible to set the current)      		 Vehicle condition:
      • Vehicle stopped
      • Shift lever is in P
      • Apply the parking brake
      		 ECB: Electronically Controlled Brake System

      Chassis > Brake/EPB > Active Test 

      Tester Display Measurement Item Control Range Restrict Condition Diagnostic Note
      EBS Relay Emergency brake signal operation Relay Start Vehicle condition: Vehicle stopped
      HINT: 
      To protect this Actuator and Solenoid, this test will only last 5 seconds.      		 This item is displayed on the GTS but is not used
      ABS Solenoid Pressure holding solenoid (SFRH, SFLH, SRRH, SRLH)
      Pressure reduction solenoid (SFRR, SFLR, SRRR, SRLR)      		 Solenoid Start (Activate)
      Solenoid SFRH / SFLH / SRRH / SRLH / SFRR / SFLR / SRRR / SRLR      		 Vehicle condition:
      • Vehicle stopped
      • Shift lever is in P
      • Apply the parking brake

      HINT: 
      To protect actuator and Solenoid(s), this test will continue for 25 seconds.      		 Check that the GTS display for the solenoid (SRLR, SRLH, SRRR, SRRH, SFLR, SFLH, SFRR or SFRH) changes to ON/OFF during Solenoid Start (Activate)
      VSC Solenoid Master cylinder cut solenoid (SMF (SM1), SMR (SM2)) Solenoid Start (Activate)
      Solenoid SMF / SMR      		 Vehicle condition:
      • Vehicle stopped
      • Shift lever is in P
      • Apply the parking brake

      HINT: 
      To protect actuator and Solenoid(s), this test will continue for 25 seconds.      		 Check that the GTS display for the solenoid (SM1 or SM2) changes to ON/OFF during Solenoid Start (Activate)
      Motor Relay ABS motor relay OFF / ON Vehicle condition: Vehicle stopped
      HINT: 
      To protect this Actuator and Solenoid, this test will only last 5 seconds.      		 Operating sound of motor can be heard
      Solenoid Relay Solenoid relay OFF / ON Vehicle condition: Vehicle stopped
      HINT: 
      To protect this Actuator and Solenoid, this test will only last 5 seconds.      		 Perform the Active Test and check that the voltage displayed for the solenoid power supply voltage Data List item changes.
      Stop Lamp Relay Stop light control relay (Stop light switch assembly) OFF / ON Vehicle condition: Vehicle stopped
      HINT: 
      To protect this Actuator and Solenoid, this test will only last 5 seconds.      		 With the brake pedal released, check that the stop lights illuminate and the value of Stop Light Relay on the GTS changes to ON when Stop Lamp Relay is ON
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