GDI <4G6> -
Troubleshooting
13A-68
INSPECTION PROCEDURE 28
Fuel pump (low pressure) system
Probable cause
The engine-ECU turns on the fuel pump relay while the engine is cranking or running,
and supplies power source to the fuel pump (low pressure).
D
Malfunction of the fuel pump relay
D
Malfunction of the fuel pump (low pressure)
D
Open circuit or short-circuited harness wire in the fuel
pump (low pressure) circuit, or poor connector contact
D
Malfunction of the engine-ECU
Check trouble symptom.
NG
Check the harness wire between the
fuel pump (low pressure) and earth, and
repair if necessary.
NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire between the
fuel pump relay and engine-ECU, and
repair if necessary.
NG
Repair
OK
NG
Repair
OK
Check the ignition switch. (Refer to
GROUP 54 - Ignition Switch.)
(2) NG
Check the following connector:
C-34
MUT-
II
Actuator test
07 Fuel pump (Refer to P.13A-81.)
OK
Normal
NG
Check the fuel pump relay. (Refer to
P.13A-106.)
NG
Replace
OK
Measure at fuel pump relay connector
A-15X.
D
Disconnect the connector, and
measure at the harness side.
D
Voltage between terminals 3, 4 and
earth
(Ignition switch: ON)
OK:
System voltage
NG
Check the following connectors:
B-28, B-89, B-103
NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire between the
fuel pump relay and ignition switch.
OK
Measure at engine-ECU connector
B-54.
D
Disconnect the connector, and
measure at the harness side.
D
Voltage between terminal 22 and
earth (Ignition switch: ON)
OK:
System voltage
NG
Check the following connector:
A-15X
OK
Measure at engine-ECU connector
B-54.
D
Disconnect the connector, and
measure at the harness side.
D
Short circuit between terminal 22
and earth (Ignition switch: ON)
OK:
The fuel pump operates (its
operation sound can be
heard).
OK
Check the following connector:
B-54
NG
Repair
OK
Check trouble symptom.
NG
Replace the engine-ECU.
NG
Measure at fuel pump (low pressure)
connector C-20.
D
Disconnect the connector, and
measure at the harness side.
(1) Voltage between terminal 5 and
earth
(Ignition switch: ON)
OK:
System voltage
(2) Continuity between 4 and earth
OK:
Continuity
(1) NG
Check the following connectors:
A-15X, B-13, B-65, C-34
NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire between the
fuel pump relay and fuel pump (low
pressure), and repair if necessary.
OK
Check the following connector:
C-20
NG
Repair
OK
Check trouble symptom.
NG
Replace the fuel pump (low pressure).
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...