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Home >> Lexus >> 2022 >> LS 500h RWD >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Electric Parking Brake System (W/ Advanced Park) - Diagnostic Codes & Symptom Tests >> ELECTRIC PARKING BRAKE SYSTEM (w/ Advanced Park) >> DTC C1125-14: Electric Parking Brake Tension Sensor "B" Circuit Short to Ground or Open [11/2021 - 10/2023] >> Description

DTC C1125-14: Electric Parking Brake Tension Sensor "B" Circuit Short to Ground or Open [11/2021 - 10/2023]: Description

The tension sensor is built into the parking brake with bracket actuator assembly. It detects the tension value of the parking brake cable and outputs the value to the No. 2 skid control ECU (brake actuator assembly).

DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note
C1125-14 Electric Parking Brake Tension Sensor "B" Circuit Short to Ground or Open Detection Condition 1:
  • Diagnosis Condition:

    After performing tension sensor zero point calibration, electric parking brake switch assembly is operated to lock side with ignition switch off or ignition switch ON

  • Malfunction Status:

    Tension2 voltage is below 0.35 V

  • Malfunction Duration:

    Approximately 1 second

Detection Condition 2:

  • Diagnosis Condition:

    When performing tension sensor zero point calibration or ignition switch ON with parking brake forcibly released

  • Malfunction Status:

    Tension2 voltage is below 0.2 V

  • Malfunction Duration:

    Approximately 1 second

  • Parking brake with bracket actuator assembly
  • Wire harness or connector
  • No. 2 skid control ECU (brake actuator assembly)
DTC stored An electric parking brake system malfunction is displayed on the multi-information display.
DTC DETECTION CONDITIONS

  Vehicle Condition
Pattern 1 Pattern 2 Pattern 3 Pattern 4
Diagnosis Condition After performing tension sensor zero point calibration, electric parking brake switch assembly is operated to lock side with ignition switch off ◦ - - -
Ignition switch ON - ◦ ◦ ◦
When performing tension sensor zero point calibration - - ◦ -
Parking brake forcibly released - - - ◦
Malfunction Status Tension2 voltage is below 0.35 V ◦ ◦ - -
Tension2 voltage is below 0.2 V - - ◦ ◦
Detection Time Approximately 1 second Approximately 1 second Approximately 1 second Approximately 1 second
Number of Trips 1 trip 1 trip 1 trip 1 trip

HINT: 

DTC will be output when conditions for either of the patterns in the table above are met.