ELECTRIC PARKING BRAKE SYSTEM, Diagnostic DTC:C13A2/22

DTC Code DTC Name
C13A2/22 Engine / Power Switch Malfunction

DESCRIPTION

When the engine switch is turned on (IG), power is supplied to the parking brake ECU assembly. This DTC is stored if IG power source voltage is not supplied to the parking brake ECU assembly when communication with other ECUs is established.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note
C13A2/22 Engine / Power Switch Malfunction

Both of following conditions are met:


  1. Engine switch on (IG)

  2. When ECM communicates with main body ECU (multiplex network body ECU) via CAN communication, IG power supply voltage is not received for approximately 3 seconds.

  • Wire harness or connector

  • IG power source circuit

  • Parking brake ECU assembly

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

WIRING DIAGRAM

B006LUXE02
*a ECU-IG NO. 1
*b to CAN
*c Parking Brake ECU Assembly
*d CAN Communication Line

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 engine switch off and wait 20 seconds or more.

  • When replacing the parking brake ECU assembly, operate the electric parking brake switch (combination switch assembly) as the parking brake indicator light (red) blinks when the engine switch is first turned on (IG).

PROCEDURE


  1. READ VALUE USING GTS (IG STATUS / IG SWITCH)


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

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

    6. Read the Data List according to the display on the GTS.


      Chassis > Electric Parking Brake > Data List
      Tester Display Measurement Item Range Normal Condition
      IG Status Engine switch status ON or OFF

      ON: Engine switch is on (IG)

      OFF: Engine switch is on (ACC) or off
      IG Switch IG power source status ON or OFF

      ON: IG power source voltage is supplied to parking brake ECU assembly

      OFF: IG power source voltage is not supplied to parking brake ECU assembly

      Chassis > Electric Parking Brake > Data List
      Tester Display
      IG Status
      IG Switch
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Click here

    OK

  2. CHECK DTC


    1. Clear the DTCs.

      Click here


      Chassis > Electric Parking Brake > Clear DTCs

    2. Turn the engine switch off.

    3. Check for DTCs.

      Click here


      Chassis > Electric Parking Brake > Trouble Codes
      Result
      Result Proceed to
      DTCs are output A
      DTCs are not output B

    A

    REPLACE PARKING BRAKE ECU ASSEMBLY Click here

    B

    USE SIMULATION METHOD TO CHECK Click here

  3. CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the K14 and K15 parking brake ECU assembly connectors.

      B006Q2VC04
      *a

      Front view of wire harness connector

      (to Parking Brake ECU Assembly)

      		 - -

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K14-5 (IG) - Body ground IG ON 8 to 16 V

    4. Turn the engine switch off.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K15-9 (GND1) - Body ground Always Below 1 Ω
      K15-10 (GND2) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR IG POWER SOURCE CIRCUIT

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR