Page 1041 - 2006 HARLEY FLSTCI SERVICE MANUAL

8.3
the ignition control module where it is used to reference

engine position (TDC) and speed. The MAP sensor is located on top of the intake manifold. The MAP sensor monitors the intake manifold pressure (vacuum) and sends the information to the ignition control module where the module adjusts the timing advance curve for opti- mum performance. The bank angle sensor is located within the turn signal/turn signal security module. If the vehicle lean angle exceeds 45 degrees for longer than one second, the ignition system is shut off. Once the sensor is tripped, the motorcycle must be uprighted, turned off and then on again before the engine can be restarted. Front and rear coils fire each spark plug
IGNITION SYSTEM: CARBURETED MODELS

The ignition control module is mounted underneath the seat.
It computes the spark advance for proper ignition timing
lates the low-voltage circuits between battery and ignition
coil. The scan tool can access the information received by
based on sensor input (from CKP , MAP and BAS) and regu-
The ignition system consists of four components: the ignition
control module, crank position sensor (CKP), manifold abso-
lute pressure (MAP) sensor and bank angle sensor (BAS).

and stored in the ignition control module. The ignition control module contains all of the solid state components used in the ignition system. The dwell time for the ignition coil is also calculated in the microprocessor and is dependent upon battery voltage. The programmed dwell is an added feature to keep battery drain to a minimum and yet give adequate spark duration at all speeds. (The ignition con- trol module has added protection against transient voltages, continuous reverse voltage protection, and damage due to jump starts.) The ignition control module is fully enclosed in a polyurethane material to protect it

GENERAL

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