ELECTRIC PARKING BRAKE SYSTEM, Diagnostic DTC:C13AD/23

DTC Code DTC Name
C13AD/23 Open in +B Circuit

DESCRIPTION

DTC Code Detection Condition Trouble Area
C13AD/23

All of following conditions are met:


  1. Parking brake ECU assembly is ON (power switch is on (IG), or 15 sec. after power switch is off and electric parking brake switch lock control is operating)

  2. When parking brake is not operating: +B voltage is less than 8.5 V*1; when parking brake is operating: +B voltage is less than 3.5 V*1

  3. Problem occurs for approx. 0.5 sec.

  • EPB*2 fuse

  • Wire harness or connector

  • Parking brake ECU assembly

WIRING DIAGRAM

A01FQCRE04

INSPECTION PROCEDURE

Note


  • If the parking brake ECU assembly is replaced, perform the "Reset Memory" and "Acquire Tension Sensor Zero Point" procedures Click here.

  • Before disconnecting connectors or fuses, turn the power switch off and wait 20 seconds or more.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU ASSEMBLY - BATTERY)


    1. Disconnect the parking brake ECU assembly connector.

    2. A01FS4HE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Parking Brake ECU Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      U36-8 (+B) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. READ VALUE USING GTS (+B VOLTAGE VALUE)


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG) and the GTS on.

    4. Enter the following menus: Chassis / Electric Parking Brake / Data List.

    5. Check the values by referring to the table below.

      Electric Parking Brake
      Tester Display Measurement Item/Range Switch Condition Normal Condition
      +B Voltage Value

      Electric parking brake motor power source information display/

      Lo, Mid or Hi

      		 Power switch on (IG) Hi
      OK
      Values are as shown in normal condition.

    NG

    REPLACE PARKING BRAKE ECU ASSEMBLY Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here