P0504
DTC P0504 Brake Switch "A" / "B" CorrelationDTC P0571 Brake Switch "A" Circuit
DESCRIPTION
DTC Detection Condition:
In addition to turning on the stop lights, the stop light switch signals are used for a variety of engine, transmission and suspension functions. The stop light switch is designed with 2 complementary signal outputs, STP and ST1-. The ECM analyzes these signal outputs to detect malfunctions in the stop light switch.
HINT: Normal condition is as shown in the table given. The signals can be read using the intelligent tester.
Wiring Diagram:
Step 1-2:
Step 3-4:
Step 4(Continued):
INSPECTION PROCEDURE