Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Ignition System: Description and Operation

Ignition Circuit:






SYSTEM TYPE
Vehicle uses an electronic ignition system with computer controlled spark timing.

COMPONENTS AND OPERATION
^ Ignition coil.
^ Camshaft driven distributor with crank angle sensor.
^ Igniter.
^ Distributor cap and rotor.
^ High voltage ignition wires.

Sensors in distributor indicate crankshaft position and engine speed. PCME monitors these signals, along with signals from other engine sensors, to determine ignition timing. PCME signals igniter to switch ignition coil primary current "ON" and "OFF", firing the coil.