GDI ±
Troubleshooting
13A-66
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:
D-12
MUT-
II
Actuator test
07 Fuel pump (Refer to P.13A-76.)
OK
Normal
NG
Check the fuel pump relay. (Refer to
P.13A-102.)
NG
Replace
OK
Measure at fuel pump relay connector
A-41X.
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:
C-72, C-74
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
C-17.
D
Disconnect the connector, and
measure at the harness side.
D
Voltage between terminal 21 and
earth (Ignition switch: ON)
OK:
System voltage
NG
Check the following connector:
A-41X
OK
Measure at engine-ECU connector
C-17.
D
Disconnect the connector, and
measure at the harness side.
D
Short circuit between terminal 21
and earth (Ignition switch: ON)
OK:
The fuel pump operates (its
operation sound can be
heard).
OK
Check the following connector:
C-17
NG
Repair
OK
Check trouble symptom.
NG
Replace the engine-ECU.
NG
Measure at fuel pump (low pressure)
connector D-17.
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:
C-24<LHD>, C-26<RHD>, D-12
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:
D-17
NG
Repair
OK
Check trouble symptom.
NG
Replace the fuel pump (low pressure).
Summary of Contents for Pajero Pinin 1999
Page 32: ...NOTES ...
Page 73: ...13A 1 FUEL CONTENTS GASOLINE DIRECT INJECTION GDI 13A FUEL SUPPLY 13B ...
Page 190: ...NOTES ...
Page 191: ...13B 1 FUEL SUPPLY CONTENTS FUEL TANK 2 Fuel Pump Module 4 ...
Page 214: ...NOTES ...
Page 222: ...NOTES ...
Page 256: ...NOTES ...
Page 274: ...NOTES ...
Page 282: ...NOTES ...
Page 360: ...NOTES ...
Page 412: ...NOTES ...
Page 443: ...32 1 POWER PLANT MOUNT CONTENTS ENGINE MOUNTING 2 TRANSMISSION MOUNTING 3 ...
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Page 467: ...NOTES ...
Page 468: ...BASIC BRAKE SYSTEM 35A ANTI SKID BRAKING SYSTEM ABS 4WD 35B 35A 1 SERVICE BRAKES CONTENTS ...
Page 499: ...NOTES ...
Page 531: ...NOTES ...
Page 541: ...NOTES ...
Page 649: ...NOTES ...
Page 728: ...54A 1 CHASSIS ELECTRICAL CONTENTS CHASSIS ELECTRICAL 54A SMART WIRING SYSTEM SWS 54B ...
Page 883: ...NOTES ...
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