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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 212 (6.7L - DTCS P0299 To P0604 - 2500 & 3500) >> Diagnosis And Testing >> P0571-Brake Switch 1 Performance >> Theory Of Operation

Theory Of Operation

WARNING: This page is about a different car, the 2012 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.

This diagnostic is designed to detect a faulty brake switch. The algorithm starts to run when the operator is driving above 30 mph (48 kmh) for more than five minutes. If after that time vehicle speed drops to below 2 mph (3 kmh) and the Powertrain Control Module (PCM) does not detect brake activity the diagnostic will fail. The PCM will turn on the ETC lamp immediately after the diagnostic runs and fails.

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