DTC C1125-14: Electric Parking Brake Tension Sensor "B" Circuit Short to Ground or Open [11/2020 - ]: Procedure

1. Using the GTS, check for DTCs other than DTC C1125-14.

   Chassis > Brake/EPB > Trouble Codes 

   Result

   Result	Proceed to
   DTCs other than C1125-14 are not output	A
   C1125-14 and other DTCs are output	B

Result: 

B 

GO TO DIAGNOSTIC TROUBLE CODE CHART 

Result: 

A 

See step  2

Pre-procedure1

• Turn the ignition switch off.
• Disconnect the A6 No. 2 skid control ECU (brake actuator assembly) connector.
• Disconnect the G71 parking brake actuator assembly with bracket connector.

• Measure the resistance according to the value(s) in the table below.

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  G71-10 (TSN2) - A6-40 (TSN2)	Always	Below 1 Ω	Ω
  G71-1 (TGND) - A6-42 (TGND)	Always	Below 1 Ω	Ω
  G71-10 (TSN2) or A6-40 (TSN2) - Body ground	Always	10 kΩ or higher	kΩ
  G71-1 (TGND) or A6-42 (TGND) - Body ground	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

Pre-procedure1

• Turn the ignition switch to ON.

• Measure the voltage according to the value(s) in the table below.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Component with harness connected (Parking Brake Actuator Assembly with Bracket)

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  G71-1 (TGND) - G71-10 (TSN2)	Ignition switch ON	0.35 to 4.5 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [11/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 12/2022]  , or refer to  REMOVAL [12/2022 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

Result: 

NG 

REPLACE PARKING BRAKE ACTUATOR ASSEMBLY WITH BRACKET. Refer to  REMOVAL [11/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 12/2022]  , or refer to  REMOVAL [12/2022 - 12/2023]  , or refer to  REMOVAL [12/2023 - ]