Monte Carlo V6-3.8L VIN K (1998)
Engine Control Module: Description and Operation
Powertrain Control Module (PCM)
DESCRIPTION
The PCM is responsible for maintaining proper spark and fuel injection timing for all driving conditions. Ignition Control (IC) spark timing is the
PCM method of controlling spark advance and ignition dwell. To provide optimum driveability and emissions, the PCM monitors input signals from
the following components in calculating Ignition Control (IC) spark timing:
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Ignition Control module (ICM).
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Engine Coolant Temperature (ECT) sensor.
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Intake Air Temperature (IAT) sensor.
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Mass Air Flow (MAP) sensor.
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Trans Range or PNP inputs from Trans Range switch or Park/Neutral Position switch.
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Throttle Position (TP) sensor.
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Vehicle Speed Sensor (VSS) / Trans Output Speed Sensor (TOSS).
For a description of Ignition Module to PCM circuits refer to Ignition System / Description and Operation / Spark Control System. See:
Ignition System/Description and Operation
