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GDI <4G9> -
Troubleshooting
13B-53
INSPECTION PROCEDURE 26
Idle speed control servo (ISC) system
Probable cause
The engine-ECU controls the amount of intake air during idling by opening and
closing the servo valve which is located in the air by-pass passage.
D
Malfunction of the idle speed control servo
D
Open circuit or short-circuited harness wire in the
idle speed control servo circuit
D
Malfunction of the engine-ECU
OK
Check the trouble symptoms.
NG
Check the harness wire between the
engine-ECU and the idle speed control
servo, and repair if necessary.
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
OK
Check the following connector:
B-54
NG
Repair
OK
Measure at the engine-ECU connector
B-54.
D
Disconnect the connector, and
measure at the harness side.
D
Voltage between 4, 5, 17, 18 and
earth (Ignition switch: ON)
OK:
System voltage
NG
Check the following connector:
A-75
NG
Repair
OK
Measure at the idle speed control servo
connector A-75.
D
Disconnect the connector, and
measure at the harness side.
D
Voltage between 2, 5 and earth
(Ignition switch: ON)
OK:
System voltage
NG
Check the harness wire between the
engine control relay and the idle speed
control servo, and repair if necessary.
Check the idle speed control servo.
(Refer to P.13B-99.)
NG
Replace
Summary of Contents for Space Runner 1998
Page 35: ...ENGINE 4G6 11A ENGINE 4G9 11B 11A 1 ENGINE CONTENTS 11109000276...
Page 74: ...NOTES...
Page 354: ...NOTES...
Page 355: ...13C 1 FUEL SUPPLY CONTENTS 13509000197 GENERAL INFORMATION 2 FUEL TANK 3...
Page 418: ...NOTES...
Page 436: ...NOTES...
Page 460: ...NOTES...
Page 532: ...NOTES...
Page 567: ...REAR AXLE 2WD 27A REAR AXLE 4WD 27B 27A 1 REAR AXLE CONTENTS 27109000246...
Page 660: ...NOTES...
Page 714: ...NOTES...
Page 722: ...NOTES...
Page 732: ...NOTES...
Page 772: ...NOTES...
Page 912: ...NOTES...
Page 954: ...NOTES...