Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 140

Special
patterns
pickup
Standard Wave Pattern
Observation conditions
Function
Pattern height
Pattern selector
Engine condition
Standard wave pattern
(V)
The wave pattern
appears for an
instant, but soon
30
disappears.
20
10
Stepper
motor
control
signal
wave
pattern
MPI -
STEPPER MOTOR
Analyzer
Measurement Method
1. Disconnect the stepper motor connector, and connect
2. Connect the analyzer special patterns pickup to the
Alternate Method (Test harness not available)
1. Connect the analyzer special patterns pickup to
Special patterns
High
Display
When the engine coolant temperature is 20_C or below, turn the ignition switch from OFF
to ON (without starting the engine).
While the engine is idling, turn the A/C switch to ON.
Immediately after starting the warm engine
Point B
Coil reverse electromotive
force (Approx. 3 ´ 10V)
Troubleshooting
the special tool (test harness: MD998463) in between.
stepper motor-side connector terminal 1 (red clip of special
tool), terminal 3 (blue clip), terminal 4 (black clip) and
terminal 6 (yellow clip) respectively.
engine-ECU <M/T> terminal 4 or engine-A/T-ECU <A/T>
terminal 14, connection terminal 5 <M/T>, 15 <A/T>,
connection terminal 17 <M/T>, 28 <A/T>, and connection
terminal 18 <M/T>, 29 <A/T> respectively.
Point A
Induced electromotive force
from the motor turning
13D-75
Time