ELECTRIC PARKING BRAKE SYSTEM, Diagnostic DTC:C13A2/22

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

DESCRIPTION

for LHD:

When the engine switch is turned on (IG), the IG operation power supply is output from the main body ECU. Power is then supplied from the luggage room junction block's RR-IG1 relay, which turns the RR-IG1 relay ON. Power is then supplied to the electric parking brake ECU.

for RHD:

When the engine switch is turned on (IG), the IG operation power supply is output from the main body ECU and the passenger side junction block's P-IG1 relay turns ON. Power is then supplied from the P-IG1 relay to the luggage room junction block's RR-IG1 relay, which turns the RR-IG1 relay ON. Power is then supplied to the electric parking brake ECU.

DTC Code Detection Condition Trouble Area
C13A2/22

Both of following conditions are met:


  1. Engine switch is on (IG)

  2. When transmission control ECU, ECM or G sensor is communicating through CAN communication, operation power supply is not input from engine switch for approx. 3 sec.

  • RR-IG1-1 fuse

  • D-IG1-3 fuse (for LHD)

  • P-IG1-3 fuse (for RHD)

  • Luggage room junction block

  • Passenger side junction block (for RHD)

  • Main body ECU

  • Wire harness or connector

  • Electric parking brake ECU

  • Engine switch

WIRING DIAGRAM

A01GL70E09
A01GL7IE02

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. CHECK IG VOLTAGE (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
      IG Status

      Engine switch information display/

      ON or OFF

      		 Engine switch on (IG) ON
      IG Switch

      IG power source information display/

      ON or OFF

      		 Engine switch on (IG) ON
      OK
      On tester screen, item changes between ON and OFF according to switch operation.

    NG

    INSPECT FUSE Click here

    OK

  2. CHECK DTC


    1. Check for DTC Click here.

      Result
      Result Proceed to
      C13A2/22 is output A
      DTC is not output B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

    REPLACE ELECTRIC PARKING BRAKE ECU Click here

  3. INSPECT FUSE


    1. Remove the RR-IG1-1fuse from the luggage room junction block.

    2. for LHD:


      1. Remove the D-IG1-3 fuse from the main body ECU.

    3. for RHD:


      1. Remove the P-IG1-3 fuse from the passenger side junction block.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      RR-IG1-1 fuse Always Below 1 Ω
      for LHD
      Tester Connection Condition Specified Condition
      D-IG1-3 fuse Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      P-IG1-3 fuse Always Below 1 Ω

    NG

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

    OK

  4. CHECK HARNESS AND CONNECTOR (ECU - LUGGAGE ROOM JUNCTION BLOCK AND BODY GROUND)

    A01GIQBE02

    1. Disconnect the S46 and S48 ECU connector.

    2. Disconnect the LA luggage room junction block connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      S48-4 (IG) - LA-21 Always Below 1 Ω
      S48-4 (IG) - Body ground Always 10 kΩ or higher
      S46-3 (GND1) - Body ground Always Below 1 Ω
      LA-43 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK LUGGAGE ROOM JUNCTION BLOCK (RR-IG1 RELAY)


    1. Disconnect the S48 ECU connector.

    2. A01GMVJE02

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      S48-4 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Result Proceed to
      NG A
      OK B

    B

    REPLACE ELECTRIC PARKING BRAKE ECU Click here

    A

  6. CHECK HARNESS AND CONNECTOR (LUGGAGE ROOM JUNCTION BLOCK - BATTERY)


    1. Disconnect the LG luggage room junction block connector.

    2. A01GL3PE14

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

      Standard voltage
      Tester Connection Condition Specified Condition
      LG-1 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (LUGGAGE ROOM JUNCTION BLOCK - BATTERY)


    1. Disconnect the LD luggage room junction block connector.

    2. A01GKA4E02

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      LD-24 - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Result Proceed to
      NG (for LHD) A
      NG (for RHD) B
      OK C

    B

    CHECK HARNESS AND CONNECTOR (LUGGAGE ROOM JUNCTION BLOCK - PASSENGER SIDE JUNCTION BLOCK) Click here

    C

    REPLACE LUGGAGE ROOM JUNCTION BLOCK

    A

  8. CHECK HARNESS AND CONNECTOR (LUGGAGE ROOM JUNCTION BLOCK - MAIN BODY ECU)

    A01GIUSE02

    1. Disconnect the LD luggage room junction block connector.

    2. Disconnect the DD main body ECU connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      LD-24 - DD-23 Always Below 1 Ω
      LD-24 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      NG A
      OK (1UR-FSE) B
      OK (1UR-FE) C

    B

    GO TO ENTRY AND START SYSTEM (Power Source Mode does not Change) Click here

    C

    GO TO ENTRY AND START SYSTEM (Power Source Mode does not Change) Click here

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. CHECK HARNESS AND CONNECTOR (LUGGAGE ROOM JUNCTION BLOCK - PASSENGER SIDE JUNCTION BLOCK)

    A01GIUSE03

    1. Disconnect the LD luggage room junction block connector.

    2. Disconnect the PJ passenger side junction block connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      LD-24 - PJ-25 Always Below 1 Ω
      LD-24 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK HARNESS AND CONNECTOR (PASSENGER SIDE JUNCTION BLOCK - BATTERY)


    1. Disconnect the PL passenger side junction block connector.

    2. A01GL3PE15

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

      Standard voltage
      Tester Connection Condition Specified Condition
      PL-1 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK HARNESS AND CONNECTOR (PASSENGER SIDE JUNCTION BLOCK - BODY GROUND)


    1. Disconnect the PA passenger side junction block connector.

    2. A01GND7E02

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

      Standard resistance
      Tester Connection Condition Specified Condition
      PA-39 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. CHECK HARNESS AND CONNECTOR (PASSENGER SIDE JUNCTION BLOCK - MAIN BODY ECU)


    1. Disconnect the PA passenger side junction block connector.

    2. A01GND7E02

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      PA-15 - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Result Proceed to
      NG A
      OK B

    B

    REPLACE PASSENGER SIDE JUNCTION BLOCK

    A

  13. CHECK HARNESS AND CONNECTOR (PASSENGER SIDE JUNCTION BLOCK - MAIN BODY ECU)


    1. Disconnect the PA passenger side junction block connector.

    2. Disconnect the DA main body ECU connector.

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

      A01GNX9E01
      Standard resistance
      Tester Connection Condition Specified Condition
      PA-15 - DA-54 Always Below 1 Ω
      PA-15 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      NG A
      OK (1UR-FSE) B
      OK (1UR-FE) C

    B

    GO TO ENTRY AND START SYSTEM (Power Source Mode does not Change) Click here

    C

    GO TO ENTRY AND START SYSTEM (Power Source Mode does not Change) Click here

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR