MPI <4G1> -
Troubleshooting
13A-76
IGNITION COIL AND POWER TRANSISTOR
Power transistor control signal
Measurement Method
1. Disconnect the ignition coil connector, and connect the
special tool (test harness: MB991348) in between. (All
terminals should be connected.)
2. Connect the analyzer special patterns pickup to terminal
3 of each ignition coil connector in turn.
Alternate Method (Test harness not available)
1. Connect the analyzer special patterns pickup to
engine-ECU terminal 10 (No. 1 - No. 4), terminal 23
(No. 2 - No. 3) respectively.
Standard Wave Pattern
Observation condition
Function
Special patterns
Pattern height
Low
Pattern selector
Display
Engine r/min
Approx. 1,200 r/min
Standard wave pattern
T: Revolution time corresponding to a crank angle of 180
_
Compression top dead center
(V)
6
4
2
Power transistor
control
signal
wave pattern
0
4
2
0
OFF
ON
Dwell section
T1: Time computed by the engine-ECU
Time
T1
q
q
: Spark
advance
angle
Ignition period
Crank
angle
sensor output
wave pattern
T
75
_
BTDC 5
_
BTDC
Special
patterns
pickup
Analyzer
Содержание Colt 2000
Страница 7: ...11A 1 ENGINE CONTENTS ENGINE 4G1 11A ENGINE 4G9 11B ...
Страница 30: ...NOTES ...
Страница 221: ...23 1 AUTOMATIC TRANSMISSION CONTENTS GENERAL 2 Outline of Changes 2 TROUBLESHOOTING 2 ...