Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 1260

Special
patterns
pickup
Standard Wave Pattern
Observation condition
Function
Pattern height
Pattern selector
Engine r/min
Standard wave pattern
(V)
6
4
Crank angle
sensor output
2
wave pattern
0
4
Power transistor
control signal
2
wave pattern
0
MPI -
Troubleshooting
IGNITION COIL AND POWER TRANSISTOR
Analyzer
D
D
Measurement Method
1. Disconnect the ignition coil connector, and connect the
2. Connect the analyzer special patterns pickup to terminal
Alternate Method (Test harness not available)
1. Connect the analyzer special patterns pickup to
T
T: Revolution time corresponding to a crank angle of 180_
5_BTDC
Compression top dead center
75_BTDC
T1
θ: Spark
θ
advance
angle
OFF
Dwell section
T1: Time computed by the engine-ECU
Ignition coil primary signal
Refer to GROUP 16 - Ignition system.
Power transistor control signal
special tool (test harness: MB991658) in between. (All
terminals should be connected.)
No. 3 of each ignition coil connector in turn.
engine-ECU terminal No. 10 (No. 1 - No. 4), terminal
No. 23 (No. 2 - No. 3) respectively.
Special patterns
Low
Display
Approximately 1,200 r/min
Ignition period
ON
13A-123
Time