Mitsubishi Stealth 1994 Import Service Manual page 582

MULTIPORT FUEL INJECTION -
IGNITION COIL AND IGNITION POWER TRANSISTOR <SOHC>
OPERATION
When the ignition power transistor unit is switched ON by the signals from the engine control module, the
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primary current of the ignition coil will flow. When the ignition power transistor unit is switched OFF, the
primary current flow is interrupted, and high voltage is produced at the secondary coil.
When the engine control module switches OFF the transistor within the unit, the battery voltage within
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the module is applied to the ignition power transistor unit, and the ignition power transistor unit is
switched ON. In addition, the ignition power transistor unit is switched OFF when the engine control
module switches ON the transistor within the module.
INSPECTION
Using Scan Tool
No. Data display
Function Item
Data reading 44
Distributor
Spark
No.1 No.4 No.2 No.5 No.3 No.6
Engine control
module connector
Check condition
Ignition Engine: Warm up
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advance
Timing light: Set
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(Use the timing light
to check actual igni-
tion timing)
On-Vehicle Inspection of MFI Components
Ignition switch [IG]
Ignition coil ,, 2
3
Engine control module
Engine state
700 rpm (Idling) 7 - 23"BTDC
2,000 rpm
Equipment
connector
terminal
I
104
Standard value
13 - 39"BTDC