PCM sets DTC P0504 if the PCM detects signal of the brake warning lamp and brake switch do not correlate within the predetermined time.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Plausibility Monitoring | 1. Poor connection or damaged harness 2. Open or Short in Circuit 3. Defected Brake Lamp Switch |
Enable Conditions |
•
Engine Running | |
Threshold Value |
•
Time between brake light switch and brake test switch do not correlate longer than > 10 Drive Cycles | |
Diagnostic Time |
•
12 times brake pedal activation | |
Mil On Condition |
•
- |
