Attention! The transistor electronic ignition system used in the models of cars under consideration generates a higher voltage than that typical for conventional ignition systems. Be careful and observe all necessary precautions.
The microprocessor-based programmable ignition system (PGM-IG) continuously optimizes the ignition timing based on engine speed, coolant temperature, throttle position and manifold vacuum. All necessary data is supplied to the control module (ECM) by the relevant information sensors, such as the TDC/CYP sensor, throttle position sensor (TPS), coolant temperature sensor and manifold absolute pressure (MAP) sensor. Different ignition timing settings are used during engine warm-up, idling and load operation. The corresponding adjustments are made by the PGM-IG system. The ignition system also includes the ignition switch, battery, ignition coil, distributor, spark plug set and high-voltage wires (see fig. illustrations).
The ignition distributor on all models is driven by the camshaft (on Integra models - by the intake camshaft). The ignition timing is adjusted by the electronic control module (ECM). On all models, the distributor is equipped with a rotation angle sensor. A description of the procedures for diagnosing faults and checking the correct operation of the TDC/CKP/CYP sensors is given in Chapter Engine management systems.