Cruise Control System

DTC P1520 STOP LIGHT SWITCH CIRCUIT

CIRCUIT DESCRIPTION

Detection Item:

When the brake pedal is depressed, the stop light switch 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 cancel functions normally, even if there is a malfunction in the stop light signal circuit.

The cancel conditions are: Battery positive voltage at terminal STP-.

When the brake is depressed, battery positive voltage normally applies through the STOP fuse and stop light switch 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 voltage and the cruise control will be turned off.

Wiring Diagram:

Step 1 - 2:

Step 3:

INSPECTION PROCEDURE