Description And Operation: Description
WARNING: This page is about a different car, the 2022 Chrysler Voyager and 2022 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The forward knock sensor (1) is known to the Powertrain Control Module (PCM) as Knock Sensor 1. The rear knock sensor (2) is known to the PCM as Knock Sensor 2.
The two knock sensors are located in the cylinder block valley. Since knock sensor voltage varies continually, the system is highly susceptible to Electromagnetic Interference (EMI) and/or Radio Frequency Interference (RFI). For this reason, the knock sensor circuits are twisted for EMI and/or RFI resistance. Knock sensors are monitored while the engine is running. Sensor and/or circuit failures are usually detected during rolls testing with the engine under load.