GDI <4G6> -
Troubleshooting
13A-91
Standard wave pattern
Crank angle
sensor output
wave pattern
(V)
75
_
BTDC
2 engine revolutions
(1 camshaft revolution)
5
_
BTDC
The time (cycle time) T is
reduced when the engine
speed increases
0
Camshaft posi-
tion sensor out-
put wave pat-
tern
TDC: Top dead centre
144
°
59
°
No. 1 TDC
No. 3 TDC
No. 4 TDC
No. 2 TDC
Time
0
159
°
44
°
Wave Pattern Observation Points
Check that cycle time T becomes shorter when the engine speed increases.
Examples of Abnormal Wave Patterns
D
Example 1
Cause of problem
Sensor interface malfunction
Wave pattern characteristics
Rectangular wave pattern is output even when the engine
is not started.
D
Example 2
Cause of problem
Loose timing belt
Abnormality in sensor disk
Wave pattern characteristics
Wave pattern is displaced to the left or right.
Summary of Contents for Space Runner 1998
Page 35: ...ENGINE 4G6 11A ENGINE 4G9 11B 11A 1 ENGINE CONTENTS 11109000276...
Page 74: ...NOTES...
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Page 355: ...13C 1 FUEL SUPPLY CONTENTS 13509000197 GENERAL INFORMATION 2 FUEL TANK 3...
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Page 567: ...REAR AXLE 2WD 27A REAR AXLE 4WD 27B 27A 1 REAR AXLE CONTENTS 27109000246...
Page 660: ...NOTES...
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