2008 INFINITI QX56 Factory Service Manual

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Page 1697 of 4083

INFINITI QX56 2008 Factory Service Manual EC-398 < COMPONENT DIAGNOSIS >[VK56DE] ELECTRICAL LOAD SIGNAL >> INSPECTION END Revision: March 2010 2008 QX56

Page 1698 of 4083

INFINITI QX56 2008 Factory Service Manual FUEL INJECTOREC-399 < COMPONENT DIAGNOSIS > [VK56DE] C D E F G H I J K L M A EC NP O FUEL INJECTOR Component DescriptionINFOID:0000000001365875 The fuel injector is a small, precise solenoid valve. Wh

Page 1699 of 4083

INFINITI QX56 2008 Factory Service Manual EC-400 < COMPONENT DIAGNOSIS >[VK56DE] FUEL INJECTOR 2. Disconnect fuel injector harness connector. 3. Turn ignition switch ON. 4. Check voltage between fuel injector terminal 1 and ground with CONSUL

Page 1700 of 4083

INFINITI QX56 2008 Factory Service Manual FUEL INJECTOREC-401 < COMPONENT DIAGNOSIS > [VK56DE] C D E F G H I J K L M A EC NP O Component InspectionINFOID:0000000001365879 FUEL INJECTOR 1. Disconnect fuel injector harness connector. 2. Check r

Page 1701 of 4083

INFINITI QX56 2008 Factory Service Manual EC-402 < COMPONENT DIAGNOSIS >[VK56DE] FUEL PUMP FUEL PUMP DescriptionINFOID:0000000001365881 SYSTEM DESCRIPTION *: ECM determines the start signal status by the signals of engine speed and battery vo

Page 1702 of 4083

INFINITI QX56 2008 Factory Service Manual FUEL PUMPEC-403 < COMPONENT DIAGNOSIS > [VK56DE] C D E F G H I J K L M A EC NP O 4. Check voltage between ECM terminal 113 and ground with CONSULT-IIl or tester. OK or NG OK >> GO TO 5. NG >> GO TO 3.

Page 1703 of 4083

INFINITI QX56 2008 Factory Service Manual EC-404 < COMPONENT DIAGNOSIS >[VK56DE] FUEL PUMP 2. Disconnect 15A fuse. 3. Check 15A fuse. OK or NG OK >> GO TO 7. NG >> Replace fuse. 7.CHECK CONDENSER-2 POWER SUPPLY CIRCUIT-II FOR OPEN AND SHORT

Page 1704 of 4083

INFINITI QX56 2008 Factory Service Manual FUEL PUMPEC-405 < COMPONENT DIAGNOSIS > [VK56DE] C D E F G H I J K L M A EC NP O >> Repair open circuit or short to ground or short to power in harness or connectors. 12.CHECK FUEL PUMP Refer to EC-4
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