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the downstream sensor begins to match the upstream IGNITION SENSE—PCM INPUT The ignition sense input informs the Powertrain Control Module (PCM) that the ignition switch is in KNOCK SENSORS—PCM INPUT Engine uses a single knock sensor. The sensor monitors both the right and left bank of cylinders. 2.7L sensor mounts into the side of the engine block. Knock sensor contain a crystal which constantly vibrates and sends an input voltage (signal) to the KNOCK SENSOR—PCM INPUT The knock sensor threads into the side of the cyl- inder block (Fig. 15). When the knock sensor detects Fig. 11 Upstream Heated Oxygen Sensor Fig. 12 Upstream Heated Oxygen Sensor Fig. 13 Downstream Heated Oxygen Sensor Fig. 14 Knock Sensor Locations—3.2/3.5L 300M FUEL SYSTEM 14 - 27 DESCRIPTION AND OPERATION (Continued) |