P0571

DTC P0571 BRAKE SWITCH "A" CIRCUIT

CIRCUIT DESCRIPTION

DTC Detection Condition:

When the brake pedal is depressed, the stop lamp switch assy sends a signal to the ECM. When the ECM receives this signal, it cancels the cruise control.

A fail-safe function is provided so that the functions normally, even if there is a malfunction in the stop lamp signal circuit.

The cancel condition occurs as battery positive voltage is supplied to terminal STP.

When the brake is on, battery positive voltage is normally applied through the STOP fuse and the stop lamp switch assy to terminal STP of the ECM, and the ECM turns the cruise control OFF.

If the harness connected to terminal STP has an open circuit, terminal STP will have battery positive voltage and the cruise control will be turned OFF.

Wiring Diagram:

Step 1 - 3:

Step 3 (Continued):

INSPECTION PROCEDURE