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Home >> GMC >> 2003 >> Safari Van AWD V6-4.3L VIN X >> Repair and Diagnosis >> Powertrain Management >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Description and Operation >> Distributor Ignition (DI) System
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Distributor Ignition (DI) System

The PCM controls all ignition system functions, and constantly corrects the basic spark timing. The PCM monitors information include the following:
- The throttle position (TP) sensor
- The engine coolant temperature (ECT) sensor
- The mass airflow (MAF) sensor
- The intake air temperature (IAT) sensor
- The vehicle speed sensor (VSS)
- The transmission gear position or range information sensors
- The engine knock sensors (KS)
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