Checking output signals from both Stop lamp switch when all of them are On or OFF simultaneously, if abnormal signal is detected for more than 60 sec., an error is recognized. And if this condition lasts for certain period, ECM/PCM sets P0504.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Brake light sw/Brake test sw plausibility check | 1. Poor connection 2. Open or short in Stop lamp switch 3. Faulty Stop lamp switch |
Enable Conditions |
•
Ignition "ON" | |
Threshold Value |
•
Correlation between brake light switch and brake test switchTime brake light switch/brake test switch do not correlate longer than 1 sec | |
Diagnostic Time |
•
60 sec | |
MIL On Condition |
•
NO MIL |
