Ignition timing is controlled by the electronic control ignition timing system.
The standard reference ignition timing data for the engine
operating conditions are pre-programmed in the memory of the ECM (Engine
Control Module).
The engine operating conditions (speed, load, warm-up
condition, etc.) are detected by the various sensors. Based on these
sensor signals and the ignition timing data, signals to interrupt the
primary current are sent to the ECM.
The ignition coil is activated, and timing is controlled.
Other information:
Components Location
1. Engine2. Transmission3. Rear differential4. Rear propeller shaft5. Transfer case6. Front propeller shaft7. Front differential
...
Inspection
Diagnosis With GDS
1.
In the body electrical system, failure can be quickly diagnosed by using the vehicle diagnostic system (GDS).
(1)
Self diagnosis : Checking failure and code number (DTC)
(2)
Current data : Checking the system input/output data state
(3)
Actuation test ...