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MODULE-POWERTRAIN CONTROL DESCRIPTION DESCRIPTION - PCM The Powertrain Control Module (PCM) is located in Two different PCM’s are used (JTEC and NGC). DESCRIPTION - MODES OF OPERATION As input signals to the Powertrain Control Module (PCM) change, the PCM adjusts its response to the output The PCM will operate in two different modes: Open Loop and Closed Loop. During Open Loop modes, the PCM receives input signals and responds only according to preset PCM program- During Closed Loop modes, the PCM will monitor the oxygen (O2S) sensors input. This input indicates to the PCM The fuel injection system has the following modes of operation: • Ignition switch ON • Engine start-up (crank) • Engine warm-up • Idle • Cruise • Acceleration • Deceleration • Wide open throttle (WOT) • Ignition switch OFF The ignition switch On, engine start-up (crank), engine warm-up, acceleration, deceleration and wide open throttle 8E - 120 ELECTRONIC CONTROL MODULES - SERVICE INFORMATION DR/DH |