ENGINE CONTROLS 1F – 49
DAEWOO V–121 BL4
FUEL SYSTEM DIAGNOSIS
Circuit Description
The fuel pump is an in–tank fuel pump mounted to a fuel
sender assembly. The fuel pump will remain on as long as
the engine is cranking or running and the powertrain con-
trol module (PCM)/engine control module (ECM) is receiv-
ing reference pulses from the crankshaft position (CKP)
sensor. If there are no reference pulses, the PCM/ECM
will turn off the fuel pump 2 seconds after the ignition
switch is turned ON or 2 seconds after the engine stops
running. The fuel pump delivers fuel to the fuel rail and the
fuel injectors, where the fuel system pressure is controlled
from 284 to 325 kPa (41 to 47 psi) by the fuel pressure reg-
ulator. The excess fuel is returned to the fuel tank.
Test Description
The number(s) below refer to step(s) on the diagnostic
table.
2.
When the engine is idling, the intake manifold vacu-
um is high. This vacuum is applied to the fuel pres-
sure regulator diaphragm, offsetting the spring
pressure inside the fuel pressure regulator and low-
ering the fuel pressure.
10. If there is fuel bleeding back through the fuel return
outlet, this is due to a faulty fuel pressure regulator.
14. Another symptom often present when the fuel injec-
tors are leaking is hard starting. Leaking fuel injec-
tors can cause a flooding condition.
23. Fuel leaking from the fuel pump inlet is due to a
faulty one–way check valve in the fuel pump.
CAUTION : The fuel system is under pressure. To
avoid fuel spillage and the risk of personal injury or
fire, it is necessary to relieve the fuel system pressure
before disconnecting the fuel lines.
CAUTION : Do not pinch or restrict nylon fuel lines to
avoid damage that could cause a fuel leak, resulting
in possible fire or personal injury.
Fuel Pressure Relief Procedure
1. Remove the fuel cap.
2. Remove the fuel pump fuse EF18 from the engine
fuse box.
3. Start the engine and allow the engine to stall.
4. Crank the engine for an additional 10 seconds.
Fuel System Diagnosis
Step
Action
Value(s)
Yes
No
1
1. Relieve the fuel system pressure.
2. Install a fuel pressure gauge.
3. Turn the ignition ON.
Is the fuel pressure within the values specified and
holding steady?
284–325 kPa
(41–47 psi)
Go to Step 2
Go to Step 5
2
1. Disconnect the fuel pressure regulator vacuum
hose.
2. Start the engine.
3. Allow the engine to idle.
4. Connect the fuel pressure regulator vacuum
hose.
Does the fuel pressure decrease?
System OK
Go to Step 3
3
1. Allow the engine to idle.
2. Disconnect the vacuum hose from the fuel
pressure regulator.
3. Connect a vacuum pump with a gauge to the
fuel pressure regulator vacuum port.
4. Apply 41–47 kPa (12–14 in. Hg) of vacuum to
the fuel pressure regulator.
Does the fuel pressure decrease?
Go to Step 4
Go to Step 16
4
1. Locate and correct the cause of the vacuum
restriction to the fuel pressure regulator.
2. Confirm the operation of the fuel pressure reg-
ulator.
Is the repair complete?
System OK
Содержание NUBIRA
Страница 1: ......
Страница 28: ...9D 2IWIPERS WASHER SYSTEMS DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS WIPERS AND WASHER SYSTEM NOTCHBACK...
Страница 29: ...WIPERS WASHER SYSTEMS 9D 3 DAEWOO V 121 BL4 WIPERS AND WASHER SYSTEM HATCHBACK...
Страница 58: ...DOORS 9P 3 DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS POWER DOOR LOCKS...
Страница 59: ...9P 4IDOORS DAEWOO V 121 BL4 POWER WINDOWS FRONT AND REAR...
Страница 92: ...9Q 2IROOF DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS POWER SUNROOF SYSTEM...
Страница 229: ...ANTILOCK BRAKE SYSTEM 4F 5 DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS ABS CIRCUIT 1 OF 4...
Страница 230: ...4F 6IANTILOCK BRAKE SYSTEM DAEWOO V 121 BL4 ABS CIRCUIT 2 OF 4...
Страница 231: ...ANTILOCK BRAKE SYSTEM 4F 7 DAEWOO V 121 BL4 ABS CIRCUIT 3 OF 4...
Страница 232: ...4F 8IANTILOCK BRAKE SYSTEM DAEWOO V 121 BL4 ABS CIRCUIT 4 OF 4...
Страница 234: ...4F 10IANTILOCK BRAKE SYSTEM DAEWOO V 121 BL4 Pin Circuit Color Signal Name B11 Not Used B12 BATT ORN Battery...
Страница 252: ...5C0 6ICLUTCH DAEWOO V 121 BL4 1 Flywheel 2 Clutch Disc 3 Pressure Plate 4 Release Bearing...
Страница 272: ...SECTION 2 POSITION OF CONNECTORS AND GROUNDS...
Страница 275: ...2 4WPOSITION OF CONNECTORS AND GROUNDS 2 WIRING HARNESS CONNECTOR GROUND LOCATION 1 W H FRONT FRONT BUMPER...
Страница 276: ...POSITION OF CONNECTORS AND GROUNDSW2 5 2 ENGINE CONTROL BATTERY S 2 0 DOHC ENGINE...
Страница 277: ...2 6WPOSITION OF CONNECTORS AND GROUNDS 3 INSTRUMENT PANEL INSIDE...
Страница 278: ...POSITION OF CONNECTORS AND GROUNDSW2 7 4 AIR BAG INSTRUMENT PANEL 5 BODY...
Страница 279: ...2 8WPOSITION OF CONNECTORS AND GROUNDS 6 W H DOOR 1 Front Door 2 Rear Door...
Страница 280: ...POSITION OF CONNECTORS AND GROUNDSW2 9 7 ABS WHEEL SPEED SENSOR 1 With Sun Roof 2 Without Sun Roof...
Страница 281: ...2 10WPOSITION OF CONNECTORS AND GROUNDS 8 ABS MODULE WHEEL SPEED SENSOR...
Страница 282: ...POSITION OF CONNECTORS AND GROUNDSW2 11 9 REAR 10 FUEL TANK TRUNK LID...
Страница 283: ...2 12WPOSITION OF CONNECTORS AND GROUNDS 11 SPLICE PACK S201 BROWN S202 BLUE S203 BROWN S204 GRAY S205 RED S206 BLUE...
Страница 284: ...POSITION OF CONNECTORS AND GROUNDSW2 13 S207 BLUE S208 WHITE S301 BLUE N B S301 BLUE H B S301 BLUE S W S302 BLACK...
Страница 285: ...2 14WPOSITION OF CONNECTORS AND GROUNDS S303 BLACK N B H B S303 BLACK S W...
Страница 286: ...SECTION 3 WIRING DIAGRAM FOR POWER SUPPLIES...
Страница 287: ...3 2WWIRING DIAGRAM FOR POWER SUPPLIES 1 IGNITION SWITCH CIRCUIT...
Страница 288: ...WIRING DIAGRAM FOR POWER SUPPLIESW3 3 2 30 Ter BAT POWER SUPPLY CIRCUIT PASSENGER ROOM FUSE BOX...
Страница 289: ...3 4WWIRING DIAGRAM FOR POWER SUPPLIES 3 15A IGN 2 15C ACC POWER SUPPLY CIRCUIT PASSENGER ROOM FUSE BOX...
Страница 290: ...WIRING DIAGRAM FOR POWER SUPPLIESW3 5 4 ENGINE ROOM FUSE RELAY CIRCUIT...
Страница 291: ...3 6WWIRING DIAGRAM FOR POWER SUPPLIES...
Страница 292: ...WIRING DIAGRAM FOR POWER SUPPLIESW3 7...
Страница 293: ...SECTION 4 USAGE AND CAPACITY OF FUSES...
Страница 297: ...SECTION 5 ELECTRICAL WIRING DIAGRAMS...
Страница 301: ...9A 2IBODY WIRING SYSTEM DAEWOO V 121 BL4 POWER DISTRIBUTION SCHEMATIC...
Страница 302: ...BODY WIRING SYSTEM 9A 3 DAEWOO V 121 BL4...
Страница 303: ...9A 4IBODY WIRING SYSTEM DAEWOO V 121 BL4 FUSE BLOCK LOCATOR ENGINE FUSE BLOCK LOCATOR PASSENGER COMPARTMENT...
Страница 306: ...BODY WIRING SYSTEM 9A 7 DAEWOO V 121 BL4 REAR HARNESS ROUTING...
Страница 307: ...9A 8IBODY WIRING SYSTEM DAEWOO V 121 BL4 FRONT HARNESS ROUTING...
Страница 308: ...BODY WIRING SYSTEM 9A 9 DAEWOO V 121 BL4 FLOOR HARNESS ROUTING...
Страница 309: ...9A 10IBODY WIRING SYSTEM DAEWOO V 121 BL4 INSTRUMENT HARNESS ROUTING...
Страница 310: ...BODY WIRING SYSTEM 9A 11 DAEWOO V 121 BL4 DOOR HARNESS ROUTING...
Страница 313: ...LIGHTING SYSTEMS 9B 3 DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS HEADLAMPS ON REMINDER CHIME CIRCUIT...
Страница 314: ...9B 4ILIGHTING SYSTEMS DAEWOO V 121 BL4 PARKING TAIL POSITION AND LICENSE LAMPS CIRCUIT...
Страница 315: ...LIGHTING SYSTEMS 9B 5 DAEWOO V 121 BL4 TURN AND HAZARD LAMPS CIRCUIT...
Страница 316: ...9B 6ILIGHTING SYSTEMS DAEWOO V 121 BL4 BRAKE AND BACKUP LAMPS CIRCUIT...
Страница 317: ...LIGHTING SYSTEMS 9B 7 DAEWOO V 121 BL4 INTERIOR COURTESY LAMP AND LUGGAGE COMPARTMENT LAMP CIRCUIT...
Страница 318: ...9B 8ILIGHTING SYSTEMS DAEWOO V 121 BL4 HEADLAMPS CIRCUIT...
Страница 319: ...LIGHTING SYSTEMS 9B 9 DAEWOO V 121 BL4 DAYTIME RUNNING LAMPS CIRCUIT...
Страница 320: ...9B 10ILIGHTING SYSTEMS DAEWOO V 121 BL4 FOG LAMPS CIRCUIT...
Страница 342: ...9C 2IHORNS DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS HORN WIRING SYSTEM...
Страница 344: ...9C 4IHORNS DAEWOO V 121 BL4 2 Connect the electrical connector 3 Connect the negative battery cable...
Страница 347: ...9F 2IAUDIO SYSTEMS DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS AUDIO SYSTEM CIRCUIT...
Страница 365: ...CRUISE CONRTOL SYSTEM 9U 3 DAEWOO V 121 BL4 CRUISE CONTROL SYSTEM AUTOMATIC TRANSAXLE 2 OF 2...
Страница 366: ...9U 4ICRUISE CONRTOL SYSTEM DAEWOO V 121 BL4 CRUISE CONTROL SYSTEM MANUAL TRANSAXLE 1 OF 2...
Страница 367: ...CRUISE CONRTOL SYSTEM 9U 5 DAEWOO V 121 BL4 CRUISE CONTROL SYSTEM MANUAL TRANSAXLE 2 OF 2...
Страница 407: ...GENERAL INFORMATION 0B 25 DAEWOO V 121 BL4...
Страница 408: ...0B 26IGENERAL INFORMATION DAEWOO V 121 BL4 Vehicle Lifting Points...
Страница 427: ...1C 8IDOHC ENGINE MECHANICAL DAEWOO V 121 BL4 COMPONENT LOCATOR UPPER END...
Страница 429: ...1C 10IDOHC ENGINE MECHANICAL DAEWOO V 121 BL4 LOWER END...
Страница 520: ...ENGINE CONTROLS 1F 15 DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS PCM ECM WIRING DIAGRAM 1 OF 6 IPCM 6KD ISFI 6TD...
Страница 521: ...1F 16IENGINE CONTROLS DAEWOO V 121 BL4 PCM ECM WIRING DIAGRAM 2 OF 6 IPCM 6KD ISFI 6TD...
Страница 522: ...ENGINE CONTROLS 1F 17 DAEWOO V 121 BL4 PCM ECM WIRING DIAGRAM 3 OF 6 IPCM 6KD ISFI 6TD...
Страница 523: ...1F 18IENGINE CONTROLS DAEWOO V 121 BL4 PCM ECM WIRING DIAGRAM 4 OF 6 IPCM 6KD ISFI 6TD...
Страница 524: ...ENGINE CONTROLS 1F 19 DAEWOO V 121 BL4 PCM ECM WIRING DIAGRAM 5 OF 6 IPCM 6KD ISFI 6TD...
Страница 525: ...1F 20IENGINE CONTROLS DAEWOO V 121 BL4 PCM ECM WIRING DIAGRAM 6 OF 6 IPCM 6KD ISFI 6TD...
Страница 526: ...ENGINE CONTROLS 1F 21 DAEWOO V 121 BL4 CONNECTOR END VIEW...
Страница 527: ...1F 22IENGINE CONTROLS DAEWOO V 121 BL4...
Страница 528: ...ENGINE CONTROLS 1F 23 DAEWOO V 121 BL4...
Страница 529: ...1F 24IENGINE CONTROLS DAEWOO V 121 BL4...
Страница 530: ...ENGINE CONTROLS 1F 25 DAEWOO V 121 BL4...
Страница 531: ...1F 26IENGINE CONTROLS DAEWOO V 121 BL4 COMPONENT LOCATOR...
Страница 541: ...1F 36IENGINE CONTROLS DAEWOO V 121 BL4...
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Страница 669: ...4T40 E AUTOMATIC TRANSAXLE 5A 15 DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS POWERTRAIN CONTROL MODULE 1 OF 3...
Страница 670: ...5A 16I4T40 E AUTOMATIC TRANSAXLE DAEWOO V 121 BL4 POWERTRAIN CONTROL MODULE 2 OF 3...
Страница 671: ...4T40 E AUTOMATIC TRANSAXLE 5A 17 DAEWOO V 121 BL4 POWERTRAIN CONTROL MODULE 3 OF 3...
Страница 681: ...FIVE SPEED MANUAL TRANSAXLE 5B 9 DAEWOO V 121 BL4 COMPONENT LOCATORS GEARS AND CASE...
Страница 684: ...5B 12IFIVE SPEED MANUAL TRANSAXLE DAEWOO V 121 BL4 SHIFT LINKAGE...