![]() ![]() At RPM and loads above this, the system gives a spark advance that varies between 0 and 50. The ignition system gives a spark near top dead center for starting. The dual-encapsulated coils (for front & rear cylinders) fire each spark plug independently - one cylinder at a time - no wasted spark. Once the sensor is tripped, the motorcycle must be uprighted, turned off and then on again If detected, the engine will be shut off. The BAS (within the TSM/TSSM/HFSM) monitors the bike for tip overs. The TMAP sensor monitors the intake manifold pressure (vacuum) and intake air temperature and sends the information to the ECM where the module adjusts the spark timing and fuel curve for optimum performance. The TMAP sensor is located on top of the intake manifold. It functions by taking readings off the 32minu2 teeth on the left side flywheel (two teeth are missing to establish a reference point). The CKP sensor generates an AC signal which is sent to the ECM where it is used to reference engine position (TDC) and speed. It is fully enclosed to protect it from vibration, dust, water or oil. The ECM has protection against transient voltages, continuous reverse voltage protection, and damage due to jump starts. The programmed dwell gives adequate spark at all speeds. The dwell time for the ignition coil is also calculated in the microprocessor and is dependent upon battery voltage. The ECM contains all of the solid state components used in the ignition system. The ECM computes the spark advance for proper ignition timing based on sensor inputs from CKP, TMAP and TPS sensors, and regulates the low-voltage circuits between battery and ignition coil. A Serial Data Bus (SDB) is implemented to communicate between the ECM, the TSM/TSSM and the Speedo/Tach devices. ![]()
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March 2023
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