Colorado 4WD L5-3.5L VIN 6 (2005)
Engine Control Module: Description and Operation
Electronic Ignition (EI) System
POWERTRAIN CONTROL MODULE (PCM)
The powertrain control module (PCM) controls all ignition system functions, and constantly corrects the spark timing. The PCM monitors information
from various sensor inputs that include the following:
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The throttle position (TP) sensor
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The engine coolant temperature (ECT) sensor
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The mass air flow (MAF) sensor
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The intake air temperature (IAT) sensor
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The vehicle speed sensor (VSS)
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The transmission gear position or range information sensors
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The engine knock sensor (KS)
