ELECTRIC PARKING BRAKE SYSTEM DATA LIST / ACTIVE TEST


  1. READ DATA LIST

    Tech Tips

    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.

    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.


    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 / ABS/VSC/TRC/EPB / Data List.

    6. Read the Data List according to the display on the GTS.


      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      ABS Warning Light ABS warning light ON or OFF

      ON: Warning light on

      OFF: Warning light off

      -
      Brake Warning Light Brake warning light ON or OFF

      ON: Warning light on

      OFF: Warning light off

      -
      Stop Light SW Stop light switch ON or OFF

      ON: Brake pedal depressed

      OFF: Brake pedal released

      -
      Parking Brake SW Parking brake switch ON or OFF

      ON: Parking brake applied

      OFF: Parking brake released

      -
      Gear Position Gear position information "P,N", R, 1st-8th, Fail or Not R Actual gear position -
      Shift Lever Position Shift lever position information "P,N", R, D/M, 1st-6th/B or Fail Actual shift lever position -
      Shift Information Shift information ON or OFF

      ON: During gear change

      OFF: Not during gear change

      -
      Deceleration Sensor Acceleration sensor reading

      Min.: -18.525 m/s2, Max.: 18.387 m/s2

      - During deceleration/acceleration: Changes continuously
      Zero Point of Decele Memorized zero value

      Min.: -25.10 m/s2, Max.: 24.90 m/s2

      - -
      Deceleration Sensor2 Acceleration sensor 2 reading

      Min.: -18.525 m/s2, Max.: 18.387 m/s2

      - During deceleration/acceleration: Changes continuously
      Zero Point of Decele2 Memorized zero value

      Min.: -25.10 m/s2, Max.: 24.90 m/s2

      - -
      Stop Light Relay Stop light control relay (Stop light switch assembly) ON or OFF

      ON: Relay on

      OFF: Relay off

      -
      FR Wheel Speed Front wheel speed sensor RH reading Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      FL Wheel Speed Front wheel speed sensor LH reading Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      RR Wheel Speed Rear wheel speed sensor RH reading Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      RL Wheel Speed Rear wheel speed sensor LH reading Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      Vehicle Speed Maximum wheel speed sensor reading Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) When driving at constant speed: No large fluctuations
      Stop Light Relay Output Stop light control relay (Stop light switch assembly) output ON or OFF

      ON: Relay output on (Stop light on)

      OFF: Relay output off (Stop light off)

      -
      EFI Communication Open ECM communication open detection Error or Normal

      Error: Momentary interruption

      Normal: Normal

      -
      Deceleration Open Acceleration sensor open detection Error or Normal

      Error: Momentary interruption

      Normal: Normal

      -
      BS1 Voltage Value +BS voltage value Min.: 0.00 V, Max.: 20.00 V - Changes in proportion to battery voltage
      Number of DTC Number of DTC recorded Min.: 0, Max.: 255 - -
      IG Voltage Value Decreased +BS voltage value decrease detection Error or Normal

      Error: Voltage low

      Normal: Normal

      -
      IG Voltage Value Increased +BS voltage value increase detection Error or Normal

      Error: Voltage high

      Normal: Normal

      -
      Vehicle Speed (Control Value)

      Vehicle speed

      (control value)

      Min.: 0.0 km/h (0.0 MPH)

      Max.: 326.4 km/h (202.8 MPH)

      - -
      ECU +B1 Voltage

      Skid control ECU

      (brake actuator assembly) +B1 voltage

      0.00 to 20.00 V 11 to 14 V -
      RH Actuator Motor Input Voltage Parking brake motor RH (parking brake actuator assembly RH) input voltage 0.00 to 20.00 V - -
      RH Actuator Motor +Terminal Voltage Parking brake motor RH (parking brake actuator assembly RH) positive (+) terminal side voltage 0.00 to 20.00 V - -
      RH Actuator Motor -Terminal Voltage Parking brake motor RH (parking brake actuator assembly RH) negative (-) terminal side voltage 0.00 to 20.00 V - -
      LH Actuator Motor Input Voltage Parking brake motor LH (parking brake actuator assembly LH) input voltage 0.00 to 20.00 V - -
      LH Actuator Motor +Terminal Voltage Parking brake motor LH (parking brake actuator assembly LH) positive (+) terminal side voltage 0.00 to 20.00 V - -
      LH Actuator Motor -Terminal Voltage Parking brake motor LH (parking brake actuator assembly LH) negative (-) terminal side voltage 0.00 to 20.00 V - -
      Indoor Temperature Interior temperature -6.50 to 57.25°C (20.30 to 135.00°F) - When displayed value differs from actual interior temperature, air conditioning system and CAN communication system may be malfunctioning
      Ambient Temperature Ambient temperature -40 to 50°C (-40 to 122°F) - When displayed value differs from actual ambient temperature, air conditioning system and CAN communication system may be malfunctioning
      EPB Switch Electric parking brake switch (electric parking brake switch assembly) input OFF, Lock, Release or Unknown

      OFF: Lock switch and release switch are off

      Lock: Lock switch on Release: Release switch on

      When not normal, electric parking brake switch (electric parking brake switch assembly) release side system may be malfunctioning

      Tech Tips

      EPB stands for electric parking brake.

      Auto Mode Request Auto mode request status OFF or ON - -
      Shift Position Position of shift lever P, N, R, D or Unknown

      P: Shift lever in P

      N: Shift lever in N

      R: Shift lever in R

      D: Shift lever in D or M

      -
      IG Switch IG power source status OFF or ON

      OFF: IG power source voltage is not input to skid control ECU (brake actuator assembly)

      ON: IG power source voltage is input to skid control ECU (brake actuator assembly)

      -
      Brake Hold Ready Brake hold control permission status OFF or ON - -
      Brake Hold Control Mode Brake hold control mode OFF, ON, Release or EPB

      OFF: Brake hold control is not operating

      ON: Brake hold control is operating

      Release: Brake hold control is released

      EPB: Parking brake is locked during brake hold control

      Tech Tips

      EPB stands for electric parking brake.

      RH Actuator Current Status Parking brake actuator assembly RH monitoring current condition Inval or Valid Valid -
      LH Actuator Current Status Parking brake actuator assembly LH monitoring current condition Inval or Valid Valid -
      RH Actuator Nut Stroke Parking brake actuator assembly RH nut stroke value 0.000 to 8.160 mm (0.000 to 0.321 in.) - -
      LH Actuator Nut Stroke Parking brake actuator assembly LH nut stroke value 0.000 to 8.160 mm (0.000 to 0.321 in.) - -
      RH Actuator Motor Actual Current Parking brake motor RH (parking brake actuator assembly RH) current value -5.0362 to 50.5000 A - -
      RH Actuator 0 load Current Parking brake actuator assembly RH current value with no load -5.0362 to 50.5000 A - -
      LH Actuator Motor Actual Current Parking brake motor LH (parking brake actuator assembly LH) current value -5.0362 to 50.5000 A - -
      LH Actuator 0 load Current Parking brake actuator assembly LH current value with no load -5.0362 to 50.5000 A - -
      Counter of IG ON After EPB Control Cancel Number of times the ignition switch was turned ON after EPB control was canceled 0 to 255 Times - -
      RH Actuator Status Parking brake actuator assembly RH condition Default, Lock, Lock Dynamic, Release, Lock Faulty, Unexpected, Lock Standby, Release Standby, Lock Dynamic Standby, Release Dynamic Standby, Lock Dynamic Faulty, Lock Standard Control, Lock Dynamic Control, Lock Control for Prevention Loosen by High Temperature, Lock Control for Prevention Slipping Down, Re-Lock Control by Switch, Recovery Lock Control, Lock Control After Dynamic PKB, Release Standard Control, Release Dynamic Control, Full Release Control - -
      LH Actuator Status Parking brake actuator assembly LH condition Default, Lock, Lock Dynamic, Release, Lock Faulty, Unexpected, Lock Standby, Release Standby, Lock Dynamic Standby, Release Dynamic Standby, Lock Dynamic Faulty, Lock Standard Control, Lock Dynamic Control, Lock Control for Prevention Loosen by High Temperature, Lock Control for Prevention Slipping Down, Re-Lock Control by Switch, Recovery Lock Control, Lock Control After Dynamic PKB, Release Standard Control, Release Dynamic Control, Full Release Control - -
      Auto Mode AUTO (shift-linked) mode permission status OFF or ON

      OFF: Manual mode.

      ON: AUTO (shift-linked) mode

      -
      Dynamic PKB Mode Dynamic parking brake operation status OFF or ON

      OFF: Dynamic parking brake is not operating

      ON: Dynamic parking brake is operating

      -
      Permission of Interlocking Shift AUTO (shift-linked) mode permission status OK or NG - -
      Permission of Interlocking Brake Brake-linked permission status OK or NG - -
      Permission of RH Interlocking PKB Lock Parking brake actuator assembly RH parking brake lock control permission status OK or NG OK -
      Permission of RH Interlocking PKB Release Parking brake actuator assembly RH parking brake release control permission status OK or NG - -
      Permission of RH Interlocking Dynamic PKB Parking brake actuator assembly RH dynamic parking control permission status OK or NG - -
      Permission of RH Interlocking PKB Full Release Parking brake actuator assembly RH parking brake full release permission status OK or NG - -
      Permission of LH Interlocking PKB Lock Parking brake actuator assembly LH parking brake lock control permission status OK or NG OK -
      Permission of LH Interlocking PKB Release Parking brake actuator assembly LH parking brake release control permission status OK or NG - -
      Permission of LH Interlocking Dynamic PKB Parking brake actuator assembly LH dynamic parking control permission status OK or NG - -
      Permission of LH Interlocking PKB Full Release Parking brake actuator assembly LH parking brake full release permission status OK or NG - -
      Fade Status Fade status OFF or ON - -
      EPB Control Cancel History Cause of EPB control cancel No Recoded, RH IC Overheat, LH IC Overheat, RH Actuator Motor Current High, LH Actuator Motor Current High, RH Actuator Motor +B Open Judging, LH Actuator Motor +B Open Judging, IG Voltage High/Low -

      Tech Tips

      EPB stands for electric parking brake.

      Parking Brake Light Parking brake indicator light (red) output signal OFF, Light or Blink

      OFF: Parking brake indicator light (red) turns off

      Light: Parking brake indicator light (red) illuminates

      Blink: Parking brake indicator light (red) flashes

      -
      EPB Warning Light Brake system warning light (yellow indicator) output signal OFF or ON

      OFF: Brake system warning light (yellow indicator) turns off

      ON: Brake system warning light (yellow indicator) illuminates

      -
  2. PERFORM ACTIVE TEST

    Tech Tips

    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. 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 / ABS/VSC/TRC/EPB / Active Test.

    6. According to the display on the GTS, perform the Active Test.


      Chassis > ABS/VSC/TRC > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Auto Mode AUTO (shift-linked) mode ON or OFF
      • Vehicle stopped

      • Ignition switch ON

      EPB Warning Light Brake system warning light (yellow) ON or OFF
      • Vehicle stopped

      • Ignition switch ON

      Tech Tips

      EPB stands for electric parking brake.

      PKB Light Parking brake indicator light (red) ON or OFF
      • Vehicle stopped

      • Ignition switch ON

      PKB Lock Control Parking brake lock control ON or OFF
      • Vehicle stopped

      • Ignition switch ON

      PKB Release Control Parking brake release control ON or OFF
      • Vehicle stopped

      • Ignition switch ON

      PKB Full Release Control Parking brake full release control ON or OFF
      • Vehicle stopped

      • Ignition switch ON