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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (Except HV) - Diagnostics - Introduction (2 Of 2) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model) >> Data List / Active Test [11/2023 - ] >> Data List / Active Test [11/2023 - ]

Data List / Active Test [11/2023 - ]

  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/EPB / Data List.
    7. According to the display on the GTS, read the Data List.

      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 (0.0 mph)
      Max.: 6553.5 km/h (4072 mph)      		 Vehicle stopped: 0.0 km/h (0.0 mph) When driving at constant speed: No large fluctuations
      FL Wheel Speed Front wheel speed sensor LH reading Min.: 0.0 km/h (0.0 mph)
      Max.: 6553.5 km/h (4072 mph)      		 Vehicle stopped: 0.0 km/h (0.0 mph) When driving at constant speed: No large fluctuations
      RR Wheel Speed Rear wheel speed sensor RH reading Min.: 0.0 km/h (0.0 mph)
      Max.: 6553.5 km/h (4072 mph)      		 Vehicle stopped: 0.0 km/h (0.0 mph) When driving at constant speed: No large fluctuations
      RL Wheel Speed Rear wheel speed sensor LH reading Min.: 0.0 km/h (0.0 mph)
      Max.: 6553.5 km/h (4072 mph)      		 Vehicle stopped: 0.0 km/h (0.0 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      		 -
      • Displays a positive value during deceleration/acceleration
      • During deceleration/acceleration: Changes continuously
      FL Wheel Acceleration Front wheel LH acceleration Min.: -200.840 m/s2
      Max.: 199.271 m/s2      		 -
      • Displays a positive value during deceleration/acceleration
      • During deceleration/acceleration: Changes continuously
      RR Wheel Acceleration Rear wheel RH acceleration Min.: -200.840 m/s2
      Max.: 199.271 m/s2      		 -
      • Displays a positive value during deceleration/acceleration
      • During deceleration/acceleration: Changes continuously
      RL Wheel Acceleration Rear wheel LH acceleration Min.: -200.840 m/s2
      Max.: 199.271 m/s2      		 -
      • Displays a positive value during deceleration/acceleration
      • 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 value Min.: -12.5 MPa
      Max.: 12.4 MPa      		 - -
      Master Cylinder Sensor Temperature Master cylinder pressure sensor temperature Min.: -80°C
      Max.: 175°C      		 Displays temperature master cylinder pressure sensor -
      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 value Min.: -25.105 m/s2
      Max.: 24.908 m/s2      		 - -
      Zero Point of Decele Memorized zero value Min.: -25.105 m/s2
      Max.: 24.908 m/s2      		 - -
      Yaw Rate Sensor Value Yaw rate sensor (airbag sensor assembly) 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 value 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 output (which supplies power to the ABS motor) from the skid control ECU (brake actuator assembly) to the ABS motor relay
      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 skid control ECU (brake actuator assembly) to the ABS solenoid relay
      Vehicle Speed Maximum wheel speed sensor reading Min.: 0.0 km/h (0.0 mph)
      Max.: 6553.5 km/h (4072 mph)      		 Vehicle stopped: 0.0 km/h (0.0 mph) When driving at constant speed: No large fluctuations
      Engine Revolutions Engine speed Min.: 0 rpm
      Max.: 65535 rpm      		 Engine stopped: 0 rpm When engine speed is constant: 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
      Power Train Driving force Powertrain drive torque Min.: -327680 N
      Max.: 327670 N      		 - -
      Gear Position Gear position information fail / 1st / 2nd / 3rd / 4th / 5th / 6th / 7th / 8th / 9th / 10th / P/N / R Actual gear position -
      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) /
      Not defined /
      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
      Not defined: Not defined
      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 standby indicator light not illuminated)
      EPB lock mode: Parking brake is engaged during brake hold control      		 HINT: 
      • EPB stands for electric parking brake
      • 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 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      		 - -
      Downhill Assist Control/Crawl Control SW Downhill assist control switch OFF / ON - For AWD
      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 switch OFF / ON OFF: Parking brake released
      ON: Parking brake applied      		 -
      Brake Pedal Load Sensing SW Brake pedal load sensing switch (brake pedal support assembly) OFF / ON OFF: Brake pedal released
      ON: Brake pedal depressed      		 -
      Brake Hold Switch Brake hold switch (PKB terminal input) OFF / ON OFF: Brake hold switch OFF
      ON: Brake hold switch ON      		 HINT: 
      The brake hold switch 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      		 HINT: 
      Refer to utility for details on how to enter Inspection Mode*1
      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      		 -
      HAB Control High power assist brake status OFF / ON OFF: During not control
      ON: During control      		 -
      Fail Status Brake booster failure status OFF / ON OFF: During not control
      ON: During control      		 -
      Fail Control Failure control status OFF / ON OFF: During not control
      ON: 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)      		 -
      Engine Stop by Stop and Start System Engine stopped by stop and start system status (for ECU control) OFF / ON OFF: Engine not stopped by stop and start control
      ON: Engine stopped by stop and start control      		 w/ Stop and Start System
      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      		 -
      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*2
      • For details on Dealer Mode (Calibration), refer to utility*3
      Zero Point Memory State of Steering Angle Sensor Steering sensor zero point memorization status Zero point is not memorized / Zero point is memorized - HINT: 
      The steering 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 1 second
      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
      IGP_PT1 IGP_PT1 status OFF / ON OFF: IGP_PT1 off
      ON: IGP_PT1 on      		 -
      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 not illuminated)
      Stand-by mode: Brake hold function stand-by state (brake hold standby indicator illuminated)      		 -
      FR Speed Signal Status Front wheel RH speed signal status Normal / Fixed Normal: Wheel speed signal not stuck
      Fixed: Wheel speed signal stuck      		 -
      FL Speed Signal Status Front wheel LH speed signal status Normal / Fixed Normal: Wheel speed signal not stuck
      Fixed: Wheel speed signal stuck      		 -
      RR Speed Signal Status Rear wheel RH speed signal status Normal / Fixed Normal: Wheel speed signal not stuck
      Fixed: Wheel speed signal stuck      		 -
      RL Speed Signal Status Rear wheel LH speed signal status Normal / Fixed Normal: Wheel speed signal not stuck
      Fixed: Wheel speed signal stuck      		 -
      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
      IGR Voltage IG1 terminal voltage value (value detected by ECU) Min.: 0.0 V
      Max.: 25.5 V      		 Ignition switch ON: 11.0 to 14.0 V*4
      Ignition switch ON: 10.5 to 16 V*5      		 -
      +BS Voltage +BS terminal voltage value (value detected by ECU) Min.: 0.0 V
      Max.: 25.5 V      		 Ignition switch ON: 11.0 to 14.0 V Changes in proportion to battery voltage
      HINT: 
      This is the voltage detected at terminal +BS (which supplies power to each solenoid) of the skid control ECU (brake actuator assembly)
      +BM Voltage BM terminal voltage value (value detected by ECU) Min.: 0.0 V
      Max.: 25.5 V      		 Ignition switch ON: 11.0 to 14.0 V Changes in proportion to battery voltage
      HINT: 
      This is the voltage detected at terminal BM (which supplies power to each solenoid) of the skid control ECU (brake actuator assembly)
      Voltage Difference between Motor Input-Output Terminal Voltage difference between motor Input-output terminal Min.: -640.00 V
      Max.: 639.98 V      		 - -
      Brakes Specifications Change by C-BEST Brakes Specifications Change by C-BEST None / Exist - -
      Zero Point Memory Status of Turning Angle Steering angle zero point memory stored/not stored Zero point is Not Memorized / Zero Point is Memorized Zero point is not memorized: Steering angle zero point memory not stored
      Zero point is memorized: Steering angle zero point memory stored      		 -
      Drive Mode Select Customize Item EPS Available Drive Mode Select Customize Item EPS Available Not Applicable / Applicable - -
      Drive Mode Select Customize Item Adaptive Variable Suspension System Available Drive Mode Select Customize Item Adaptive Variable Suspension System Available Not Applicable / Applicable - -
      Drive Mode Select Customize Item Brake Available Drive Mode Select Customize Item Brake Available Not Applicable / Applicable - -
      1. *1: for entering Inspection Mode:

        Refer to UTILITY [11/2023 - ]

      2. *2: for performing Dealer Mode (Signal Check):

        Refer to TEST MODE PROCEDURE [11/2023 - ]

      3. *3: for entering Dealer Mode (Calibration):

        Refer to UTILITY [11/2023 - ]

      4. *4: w/o Stop and Start System
      5. *5: w/ Stop and Start System
  2. DATA LIST (STEERING ANGLE SENSOR) 
    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 / Steering Angle Sensor / Data List.
    7. According to the display on the GTS, read the Data List.

      Chassis > Steering Angle Sensor > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Total Distance Traveled Total distance traveled Min.: 0
      Max.: 16777215      		 - -
      Total Distance Traveled - Unit Total distance traveled unit km / mile - -
      Steering Angle Signal Information (Rotation to the left side is positive) Min.: -3072.0 deg
      Max.: 3070.5 deg      		 Turning left: 0.0 to 3070.5 deg
      Turning right: -3072.0 to 0.0 deg      		 During steering operation: Changes in proportion with steering wheel rotation
      Sensor Malfunction Factor (Current) Sensor malfunction factor (current) Normal / Angle Velocity / AD / Sensor Element / Steering Angle Value / Steering Angle Value of RAM Stuck - -
      Sensor Malfunction Factor (Past) Sensor malfunction factor (past) Normal / Angle Velocity / AD / Sensor Element / Steering Angle Value / Steering Angle Value of RAM Stuck - -
      Total Distance Traveled (When Sensor Malfunction occurred) Total distance traveled (when sensor malfunction occurred) Min.: 0
      Max.: 16777215      		 - -
      Total Distance Traveled - Unit (When Sensor Malfunction occurred) Total distance traveled unit (when sensor malfunction occurred) km / mile - -
  3. CHECK FOR INTERMITTENT PROBLEMS 

    HINT: 

    A momentary interruption (open circuit) in the connectors and/or wire harness 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. Follow the directions on the GTS to display the Data List and select areas where momentary interruption 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).
      • If Under intermittent remains displayed for one of the items on the GTS, check for continuity between the ECU and the item for which Under intermittent is displayed.
      • 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.

      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: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      FL Speed Open Front speed sensor LH open detection Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      RR Speed Open Rear speed sensor RH open detection Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      RL Speed Open Rear speed sensor LH open detection Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      EFI Communication Open ECM communication open detection Normal / Under intermittent Normal: ECM communication invalid state not detected
      Under intermittent: ECM communication invalid state detected      		 -
      Yaw Rate Open Yaw rate sensor (airbag sensor assembly) open detection Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      Deceleration Open Acceleration sensor (airbag sensor assembly) open detection Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      Steering Open Steering angle sensor open detection Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      Master Cylinder Open Master cylinder pressure sensor open detection Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      FR Speed Sensor Voltage Open Front speed sensor RH voltage open detection Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      FL Speed Sensor Voltage Open Front speed sensor LH voltage open detection Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      RR Speed Sensor Voltage Open Rear speed sensor RH voltage open detection Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      RL Speed Sensor Voltage Open Rear speed sensor LH voltage open detection Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      M/C Pressure Sensor Noise Master cylinder pressure sensor noise detection Normal / Under intermittent Normal: Noise not detected
      Under intermittent: Noise detected      		 -
      Brake Pedal Switch Open Brake pedal load sensing switch (brake pedal support assembly) open detection Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      Yaw Rate Sensor Voltage Open Yaw rate sensor (airbag sensor assembly) voltage open detection Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      EFI Communication Invalid ECM communication invalid detection Normal / Under intermittent Normal: ECM communication invalid state not detected
      Under intermittent: ECM communication invalid state detected      		 -
      Master Cylinder Pressure Sensor Power Supply Open Master cylinder pressure sensor power supply voltage status Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      Solenoid Power Supply Open Solenoid power supply voltage status Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      Motor Power Supply Open Motor power supply voltage status Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      Stop Switch Open Momentary interruption (open circuit) status in wire harness between skid control ECU (brake actuator assembly) and stop light switch assembly status Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      A/C ECU Communication Open Air conditioning amplifier assembly communication open detection Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      Stop and Start ECU Communication Open Engine stop and start ECU communication open detection Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 w/ Stop and Start System
      Air Bag ECU Communication Open Airbag sensor assembly open detection Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
      Body ECU Communication Open Main body ECU (multiplex network body ECU) communication open detection Normal / Under intermittent Normal: Momentary interruption not detected
      Under intermittent: Momentary interruption detected      		 -
    6. Select the line graph display.
    7. Using the line graph, check whether the status is "Normal" or "Under intermittent".

      OK

      Normal is displayed.

      HINT: 

      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.

    8. While observing the screen, gently jiggle the connector or wire harness between the ECU and each 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.
        GTY884910Courtesy 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.
  4. 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/EPB / Active Test.
    7. According to the display on the GTS, perform the Active Test.
      NOTE:
      • Although the Active Test automatically turns off the pump motor after approximately 5 seconds in order to protect the motor, do not operate the pump motor repeatedly without sufficient waiting time in between.
      • Although the Active Test automatically turns off each solenoid after approximately 2 seconds in order to protect the solenoid, 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.

      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.      		 Refer to on-vehicle inspection for the brake actuator*
      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.      		 Refer to on-vehicle inspection for the brake actuator*
      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
      1. *: Refer to ON-VEHICLE INSPECTION [12/2019 - ]
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