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 sets P0504.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Plausibility check | 1. Poor connection 2. Open or Short to ground in power circuit 3. Open in control circuit 4. Brake switch |
Enable Conditions |
•
IG On | |
Threshold Value |
•
When brake light and brake test switch signals does not equal each other for more than 1sec | |
Diagnostic Time |
•
60 sec | |
MIL ON Condition |
•
DTC only |
