ELECTRIC PARKING BRAKE SYSTEM, Diagnostic DTC:C13AD/23

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

DESCRIPTION

The parking brake ECU assembly is supplied with power to operate the motor via the +B and +B2 terminals.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note
C13AD/23 Open in +B Circuit

All of following conditions are met:


  1. Power switch on (IG) or electric parking brake switch (integration control and panel assembly) pulled to lock side with power switch off.

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

  3. Not operating: Approximately 1 second

    Operating: Approximately 0.5 seconds

Tech Tips

*: This value is based on the assumption that the auxiliary battery voltage is 12 V.

  • Wire harness or connector

  • Parking brake ECU assembly

 Yes An electric parking brake system malfunction is displayed on the multi-information display.

WIRING DIAGRAM

B002JFNE01

CAUTION / NOTICE / HINT

Note


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

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

  • When replacing the parking brake ECU assembly, operate the electric parking brake switch (integration control and panel assembly), as the parking brake indicator light (red) blinks when the power switch is first turned on (IG).

PROCEDURE


  1. READ VALUE USING GTS (ECU +B1 VOLTAGE / ECU +B2 VOLTAGE)


    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 Data List.


      Chassis > Electric Parking Brake > Data List
      Tester Display Measurement Item Range Normal Condition
      ECU +B1 Voltage Parking brake ECU assembly +B voltage display 0.00 to 20.00 V 11 to 14 V
      ECU +B2 Voltage Parking brake ECU assembly +B2 voltage display 0.00 to 20.00 V 11 to 14 V

      Chassis > Electric Parking Brake > Data List
      Tester Display
      ECU +B1 Voltage
      ECU +B2 Voltage
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

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


    1. Turn the power switch off.

    2. B002HDMC02
      *a

      Front view of wire harness connector

      (to Parking Brake ECU Assembly)

      Disconnect the parking brake ECU assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Q25-7 (+B) - Body ground Always 11 to 14 V
      Q25-12 (+B2) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE PARKING BRAKE ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR