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System Operation: Tachometer

The PCM uses the CKP  sensor to measure the engine rpm. The IPC  uses the engine Revolutions Per Minute (RPM) data message from the PCM to control the tachometer. The base and optional IPC  tachometers appear differently but function the same. The base IPC  uses an analog gauge. The optional IPC  uses a digital display that provides a 6, 000 rpm bar graph or a 7, 000 rpm simulated analog gauge display depending on the selected display mode.

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