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GDI <4G6> -
Troubleshooting
13A-15
Code No.12 Air flow sensor system
Probable cause
Range of check
D
Engine speed is 500 r/min or more.
Set conditions
D
Sensor output frequency is 3.3 Hz or less for 4 seconds.
D
Malfunction of the air flow sensor
D
Open circuit or short-circuited harness wire of air
flow sensor circuit
D
Malfunction of the engine-ECU
NG
Repair
NG
Repair
OK
Replace the engine-ECU.
NG
Repair
NG
Replace the air flow sensor.
NG
Repair
NG
Replace the air flow sensor.
NG
Repair
OK
Replace the engine-ECU.
NG
OK
Check trouble symptom.
OK
Check the following connector:
B-54
OK
Check trouble symptom.
(2) NG
Measure at the engine-ECU connector
B-54.
D
Connect the connector
D
Voltage between 19 and earth
(Ignition switch: ON)
OK:
6 - 9 V
NG
Check the following connector:
A-07
OK
Check trouble symptom.
OK
Check the following connector:
A-07
NG
Check the harness wire between the
engine-ECU and the air flow sensor,
and repair if necessary.
OK
Check trouble symptom.
(2), (3) NG
Check the following connectors:
B-51, B-52
Measure at the air flow sensor connector
A-07.
D
Connect the connector
(Use the test harness MB991709)
(1) Voltage between 3 and earth
(Engine: Idling)
OK:
2.2 - 3.2 V
(2) Voltage between 7 and earth
OK:
0 - 0.1 V
(Engine: Idling)
OK:
6 - 9 V
(Engine speed: 4,000 r/min)
(1) NG
Measure at the air flow sensor connector
A-07.
D
Disconnect the connector, and
measure at the harness side.
(1) Voltage between 4 and earth
(Ignition switch: ON)
OK:
System voltage
(2) Voltage between 3 and earth
(Ignition switch: ON)
OK:
4.8 - 5.2 V
(3) Continuity between 5 and earth
OK:
Continuity
(1) NG
Check the harness wire between the
air flow sensor and the engine control
relay, and repair if necessary.
Содержание Space Runner 1998
Страница 35: ...ENGINE 4G6 11A ENGINE 4G9 11B 11A 1 ENGINE CONTENTS 11109000276...
Страница 74: ...NOTES...
Страница 119: ...13A 1 FUEL CONTENTS GASOLINE DIRECT INJECTION GDI 4G6 13A GASOLINE DIRECT INJECTION GDI 4G9 13B FUEL SUPPLY 13C...
Страница 354: ...NOTES...
Страница 355: ...13C 1 FUEL SUPPLY CONTENTS 13509000197 GENERAL INFORMATION 2 FUEL TANK 3...
Страница 418: ...NOTES...
Страница 436: ...NOTES...
Страница 460: ...NOTES...
Страница 519: ...AUTOMATIC TRANSMISSION On vehicle Service 23 59 OIL SEAL LAYOUTsub 04 O A H B C D E F G I J K L M N...
Страница 532: ...NOTES...
Страница 567: ...REAR AXLE 2WD 27A REAR AXLE 4WD 27B 27A 1 REAR AXLE CONTENTS 27109000246...
Страница 660: ...NOTES...
Страница 714: ...NOTES...
Страница 722: ...NOTES...
Страница 732: ...NOTES...
Страница 772: ...NOTES...
Страница 912: ...NOTES...
Страница 913: ...INTERIOR 52A SUPPLEMENTAL RESTRAINT SYSTEM SRS 52B 52A 1 INTERIOR AND SUPPLEMENTAL RESTRAINT SYSTEM SRS CONTENTS...
Страница 954: ...NOTES...