An implausibility occurs if the brake contacts brake main switch and brake redundant
switch have different values for long than specified time. If such an implausibility is detected
the event counter will be increment. If the counter exceeds the limit, final defect is detected.
PROBABLE CAUSE
Failed stop lamp switch
Failed electrical harness in stop lamp switch circuit
Failed engine-ECU
(Refer to Symptom Procedure - Stop Lamp Switch System .)
