CRUISE CONTROL SYSTEM, Diagnostic DTC:P057162

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

DESCRIPTION

When the brake pedal is depressed, the stop light switch assembly sends a signal to the ECM. When the ECM receives this signal, it cancels cruise control system control of vehicle speed. The fail-safe function operates to enable normal driving 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 is applied, voltage is normally applied to terminal STP of the ECM through the STOP fuse and the stop light switch assembly, and the ECM cancels control of vehicle speed by the cruise control system.

DTC No. DTC Detection Condition Trouble Area
P057162 When voltage of STP terminal and that of ST1- terminal of ECM are less than 1 V for 0.5 sec. or more

  • Stop light switch assembly

  • Stop light switch circuit

  • ECM

WIRING DIAGRAM

B000JDJE09

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (POWER SOURCE, BODY GROUND)


    1. B000JH8E08
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Stop Light Switch Assembly)

      Disconnect the 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
      A77-3 (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
      A77-1 (B) - A77-3 (GND) Always 11 to 14 V
      A77-5 (B) - A77-3 (GND) Ignition switch ON 11 to 14 V

    4. Reconnect the stop light switch assembly connector.


    NG

    REPLACE ECM Click here

    OK

  2. INSPECT STOP LIGHT SWITCH ASSEMBLY


    1. Inspect the stop light switch assembly Click here.


    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (ECM - STOP LIGHT SWITCH ASSEMBLY)


    1. Disconnect the ECM connector.

    2. Disconnect the stop light switch 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
      A84-9 (STP) - A77-2 (OUT) Always Below 1 Ω
      A84-10 (ST1-) - A77-4 (L) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A84-9 (STP) or A77-2 (OUT) - Body ground Always 10 kΩ or higher
      A84-10 (ST1-) or A77-4 (L) - Body ground Always 10 kΩ or higher

    4. Reconnect the stop light switch assembly connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here