Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 137

13D-72
Standard wave pattern
Crank angle
sensor output
wave pattern
Camshaft posi-
tion sensor out-
put wave pat-
tern
TDC: Top dead centre
Wave Pattern Observation Points
Check that cycle time T becomes shorter when the engine speed increases.
MPI -
2 engine revolutions
(1 camshaft revolution)
(V)
75_BTDC
5_BTDC
0
131° 49°
0
No. 1 TDC No. 3 TDC
Examples of Abnormal Wave Patterns
D
D
Troubleshooting
56° 34°
No. 4 TDC No. 2 TDC
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.
The time (cycle time) T is
reduced when the engine
speed increases
Time