DYNAMIC RADAR CRUISE CONTROL SYSTEM(for 6AR-FSE), Diagnostic DTC:P057113

DTC Code DTC Name
P057113 Brake Switch "A" Circuit Open

DESCRIPTION

The ECM receives the brake demand signal from the driving support ECU assembly and transmits it to the skid control ECU (brake actuator assembly). The skid control ECU (brake actuator assembly) receives a signal from the ECM and operates the skid control ECU (brake actuator assembly). The skid control ECU (brake actuator assembly) operates the brake actuator assembly and at the same time illuminates the stop light by operating the No. 1 integration relay.

DTC No. DTC Detection Condition Trouble Area
P057113 While the dynamic radar cruise control system is operating (vehicle-to-vehicle distance control mode), the ECM detects the No. 1 integration relay error signal from the skid control ECU (brake actuator assembly) for approximately 0.2 seconds or more.

  • No. 1 integration relay

  • No. 1 integration relay circuit

  • Skid control ECU (brake actuator assembly)

  • ECM

WIRING DIAGRAM

A01W08ZE05

CAUTION / NOTICE / HINT

Tech Tips

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

PROCEDURE


  1. CHECK STOP LIGHT OPERATION


    1. Check that the stop lights come on when the brake pedal is depressed, and go off when the brake pedal is released.

      OK
      Condition Illumination Condition
      Brake pedal depressed ON
      Brake pedal released OFF

    NG

    GO TO LIGHTING SYSTEM (EXT) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - SKID CONTROL ECU)


    1. Disconnect the A28 stop light switch assembly connector.

    2. Disconnect the A69 skid control ECU (brake actuator assembly) connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      A28-2 (L) - A69-2 (STP) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A28-2 (L) or A69-2 (STP) - Body ground Always 10 kΩ or higher

    4. Reconnect the A69 skid control ECU (brake actuator assembly) connector.

    5. Reconnect the A28 stop light switch assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - SKID CONTROL ECU)


    1. Disconnect the 1F and 1G No. 1 integration relay connectors.

    2. Disconnect the A69 skid control ECU (brake actuator assembly) connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      1F-11 (STOP) - A69-22 (STP2) Always Below 1 Ω
      1F-16 (STPS) - A69-2 (STP) Always Below 1 Ω
      1G-3 (ACC) - A69-31 (STPO) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      1F-11 (STOP) or A69-22 (STP2) - Body ground Always 10 kΩ or higher
      1F-16 (STPS) or A69-2 (STP) - Body ground Always 10 kΩ or higher
      1G-3 (ACC) or A69-31 (STPO) - Body ground Always 10 kΩ or higher

    4. Reconnect the A69 skid control ECU (brake actuator assembly) connector.

    5. Reconnect the 1F and 1G No. 1 integration relay connectors.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT NO. 1 INTEGRATION RELAY

    Click here


    NG

    REPLACE NO. 1 INTEGRATION RELAY Click here

    OK

  5. REPLACE BRAKE ACTUATOR ASSEMBLY

    Click here


    NEXT

  6. CHECK FOR DTCs (DTC P057113)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Clear the DTCs Click here.

    4. Make sure that the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the system cannot detect the malfunction.

    5. Enter the following menus: Powertrain / Radar Cruise1 / Trouble Codes.

    6. Check for DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC P057113 is output B

    7. Turn the engine switch off.


    A

    END

    B

    REPLACE ECM Click here