P0504

DTC P0504 BRAKE SWITCH "A"/"B" CORRELATION

CIRCUIT DESCRIPTION

DTC Detection Condition:

In addition to turning on the stop lamps, the stop lamp switch signals are used for a variety of engine, transmission, and suspension functions. The stop lamp switch is designed with two complementary signal outputs: STP and ST1-. The ECM analyzes these signal outputs to detect malfunctions in the stop lamp switch.

HINT: Normal condition is as shown in the table. The signals can be read using the hand-held tester.

Wiring Diagram:

Step 1-3:

Step 4:

INSPECTION PROCEDURE