Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 540

Special
patterns
pickup
MPI –
Troubleshooting
Examples of Abnormal Wave Patterns
Example 1
Cause of problem
Sensor interface malfunction
Wave pattern characteristics
Rectangular wave pattern is output even when the engine
is not started.
Example 2
Cause of problem
Loose timing belt
Abnormality in sensor disk
Wave pattern characteristics
Wave pattern is displaced to the left or right.
INJECTOR
Analyzer
Measurement Method
1. Disconnect the injector connector, and then connect the
special tool (test harness: MB991348) in between.
(Both the power supply side and engine-ECU side should
be connected.)
2. Connect the analyzer special patterns pickup to terminal
2 of the injector connector.
Alternate Method (Test harness not available)
1. Connect the analyzer special patterns pickup to
engine-ECU terminal 1.
(When checking the No. 1 cylinder.)
2. Connect the analyzer special patterns pickup to
engine-ECU terminal 14.
(When checking the No. 2 cylinder.)
3. Connect the analyzer special patterns pickup to
engine-ECU terminal 2.
(When checking the No. 3 cylinder.)
4. Connect the analyzer special patterns pickup to
engine-ECU terminal 15.
(When checking the No. 4 cylinder.)
13B-59