The HECU monitors the ESS brake lamp relay (ESS) relay for normal operation. If there is an open or short in the relay circuit, this DTC is set.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Voltage Monitoring | 1. Open or short in the ESS brake lamp relay(ESS relay) circuit 2. Faulty ESS brake lamp relay(ESS relay) |
Enable Conditions |
•
During ESS activation, the fault is detected with mismatch between the corresponding lamp actuation signal and electrical feedback signal more than 600ms. | |
Fail Safe |
•
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