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. Electric parking brake ECU is ON (engine switch is on (IG), or 15 sec. after engine 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*; when parking brake is operating: +B voltage is less than 3.5 V*

  3. Problem occurs for approx. 0.5 sec.

  • E-PKB fuse

  • Wire harness or connector

  • Electric parking brake ECU

Tech Tips

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

WIRING DIAGRAM

A01GJKNE01

INSPECTION PROCEDURE

Note


  • If the electric parking brake ECU or parking brake with bracket actuator assembly is replaced, perform the "Reset Memory" and "ACQUIRE TENSION SENSOR ZERO POINT" procedures Click here.

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

PROCEDURE


  1. INSPECT FUSE (E-PKB)


    1. Remove the E-PKB fuse from the luggage room junction block.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      E-PKB fuse Always Below 1 Ω
      Result
      Result Proceed to
      NG A
      OK B

    B

    CHECK HARNESS AND CONNECTOR (ECU - BATTERY) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (ECU - BODY GROUND)


    1. Disconnect the S46 ECU connector.

    2. A01GKA6E01

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

      Standard resistance
      Tester Connection Condition Specified Condition
      S46-8 (+B) - Body ground Always 10 kΩ or higher

    NG

    CHECK FOR SHORTS IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE

    OK

    REPLACE FUSE

  3. CHECK HARNESS AND CONNECTOR (ECU - BATTERY)


    1. Disconnect the S46 ECU connector.

    2. A01GKA6E01

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

      Standard voltage
      Tester Connection Condition Specified Condition
      S46-8 (+B) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK ELECTRIC PARKING BRAKE ECU (DATA LIST)


    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG) and the tester ON.

    4. Enter the following menus:

      Select: 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

      +B power source information display/

      Lo/Mid/Hi

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

    NG

    REPLACE ELECTRIC PARKING BRAKE ECU Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here