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DYNAMIC RADAR CRUISE CONTROL SYSTEM(for Mono Camera Type), Diagnostic DTC:P057162

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DTC Code DTC Name
P057162 Brake Switch "A" Signal Compare Failure
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DESCRIPTION

When the brake pedal is depressed, the stop light switch assembly outputs a signal to the hybrid vehicle control ECU assembly. When the hybrid vehicle control ECU assembly receives the signal, it cancels control of vehicle speed by the dynamic radar cruise control system. The fail-safe function operates to enable normal operation even if there is a malfunction in the stop light signal circuit. The cancellation condition occurs when voltage is applied to terminal STP. When the brake pedal is depressed, voltage is applied to terminal STP of the hybrid vehicle control ECU assembly through the STOP fuse and the stop light switch assembly, and the hybrid vehicle control ECU assembly turns the dynamic radar cruise control system off.

DTC No. Detection Item DTC Detection Condition Trouble Area
P057162 Brake Switch "A" Signal Compare Failure While the dynamic radar cruise control system is operating, voltage of STP terminal and that of ST1- terminal of hybrid vehicle control ECU assembly are less than 1 V for approximately 0.5 seconds or more.

  • Stop light switch assembly

  • Harness or connector

  • Hybrid vehicle control ECU assembly
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

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

  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

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PROCEDURE


  1. Click here

    CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - AUXILIARY BATTERY AND BODY GROUND)


    1. B004RFOC25
      *a

      Front view of wire harness connector

      (to Stop Light Switch Assembly)

      Disconnect the A3 stop light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A3-3 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A3-1 (B) - Body ground Always 11 to 15.5 V
      A3-5 (B) - Body ground Power switch on (IG) 11 to 14 V
      A3-5 (B) - Body ground Power switch off Below 1 V

    4. Connect the A3 stop light switch assembly connector.

      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - AUXILIARY BATTERY AND BODY GROUND)

  2. Click here

    INSPECT STOP LIGHT SWITCH ASSEMBLY


    1. Inspect the stop light switch assembly.

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      Result
      Proceed to
      OK
      NG

  3. Click here

    CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY)


    1. Disconnect the cable from the negative (-) auxiliary battery terminal.

    2. Disconnect the A77 hybrid vehicle control ECU assembly connector.

    3. Disconnect the A3 stop light switch assembly connector.

    4. Disconnect the A12 skid control ECU assembly connector.

    5. Disconnect the G82 shift control ECU connector.

    6. Disconnect the L111 No. 3 semiconductor power integration ECU connector.

    7. Disconnect the L31 certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A77-21 (ST1-) - A3-4 (L) Always Below 1 Ω
      A77-8 (STP) - A3-2 (L) Always Below 1 Ω
      A77-21 (ST1-) or A3-4 (L) - Body ground Always 10 kΩ or higher
      A77-8 (STP) or A3-2 (L) - Body ground Always 10 kΩ or higher

    9. Connect the L31 certification ECU (smart key ECU assembly) connector.

    10. Connect the L111 No. 3 semiconductor power integration ECU connector.

    11. Connect the G82 shift control ECU connector.

    12. Connect the A12 skid control ECU assembly connector.

    13. Connect the A3 stop light switch assembly connector.

    14. Connect the A77 hybrid vehicle control ECU assembly connector.

    15. Connect the cable from the negative (-) auxiliary battery terminal.

      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLYClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY)