ELECTRIC PARKING BRAKE SYSTEM, Diagnostic DTC:C13A1/12

DTC Code DTC Name
C13A1/12 Short in Power Supply Relay Circuit

DESCRIPTION

The following DTCs are stored when a malfunction occurs in the parking brake ECU assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note
C13A1/12 Short in Power Supply Relay Circuit

Both 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. Parking brake ECU assembly power source relay is shorted for approx. 60 sec.

  • Wire harness or connector

  • Electric parking brake switch (Integration control and panel assembly)

  • Parking brake ECU assembly

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

WIRING DIAGRAM

A01CMXXE01

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. CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU ASSEMBLY - IG POWER SOURCE CIRCUIT)


    1. B002JIEC07
      *a

      Front view of wire harness connector

      (to Parking Brake ECU Assembly)

      Turn the power switch off.

    2. Disconnect the parking brake ECU assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Q24-5(IG) - Body ground Power switch off Below 2.5 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT ELECTRIC PARKING BRAKE SWITCH (INTEGRATION CONTROL AND PANEL ASSEMBLY)


    1. Remove the electric parking brake switch (integration control and panel assembly).

      Click here

    2. Inspect the electric parking brake switch (integration control and panel assembly).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU ASSEMBLY - ELECTRIC PARKING BRAKE SWITCH (INTEGRATION CONTROL AND PANEL ASSEMBLY))


    1. Disconnect the I35 electric parking brake switch (integration control and panel assembly) connector.

    2. A01CQ4FC08
      *a

      Front view of wire harness connector

      (to Parking Brake ECU Assembly)

      Disconnect the parking brake ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q24-20 (LCK1) - Body ground Always 10 kΩ or higher
      Q24-15 (LCK2) - Body ground Always 10 kΩ or higher
      Q24-16 (REL2) - Body ground Always 10 kΩ or higher
      Q24-19 (REL1) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE PARKING BRAKE ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR