2002 Traxter Autoshift XL/XT Shop Manual, Page 138Get this manual
Section 05 ELECTRICAL Subsection 02 (OVERVIEW)
Magneto FlywheelTrigger Coil
The magneto flywheel features six protrusions that are working with the trigger coilThe trigger coil sends the signals to the MPEM to be processed for the ignition systemThe MPEM also uses these signals to accurately calculate the engine RPM and among other things, control the maximum engine RPM
UpshiftDownshift Switch
When the upshift or downshift button is pressed, the MPEM activates the proper solenoid (up or down) that moves the shared hydraulic valve
Many sensors are used to assist the MPEM to acquire the conditions where the vehicle is operated to allow the MPEM to compute and select the proper parameters accordinglyThe VSS (vehicle speed sensor) supplies the MPEM with the vehicle speedThe GBPS (gearbox position sensor) supplies the MPEM with the gear position (1, 2, 3, 4, 5)The STPS (sub-transmission position sensor) supplies the MPEM with the sub-transmission position (P, R, N, H, L)The brake light switch is also used by the MPEM to allow engine starting in other position than PARK and NEUTRALOther sensors are utilized but they are not related to the shifting system