2005 INFINITI QX4 Factory Service Manual

Page 1825 of 3419

INFINITI QX4 2005  Factory Service Manual EC-634Revision: October 2005
INJECTOR CIRCUIT
2005 QX56
2. CHECK OVERALL FUNCTION
 With CONSULT-II
1.  Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with
CONSULT-II.
3. Make s

Page 1826 of 3419

INFINITI QX4 2005  Factory Service Manual INJECTOR CIRCUIT
EC-635
C
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EC
Revision: October 20052005 QX56
3. CHECK INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect injector harness connector.
3. Turn

Page 1827 of 3419

INFINITI QX4 2005  Factory Service Manual EC-636Revision: October 2005
INJECTOR CIRCUIT
2005 QX56
6. CHECK INJECTOR
Refer to EC-636, "
Component Inspection" .
OK or NG
OK >> GO TO 7.
NG >> Replace injector.
7. CHECK INTERMITTENT INCIDENT
Refe

Page 1828 of 3419

INFINITI QX4 2005  Factory Service Manual FUEL PUMP CIRCUIT
EC-637
C
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EC
Revision: October 20052005 QX56
FUEL PUMP CIRCUITPFP:17042
DescriptionUBS00HDB
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the si

Page 1829 of 3419

INFINITI QX4 2005  Factory Service Manual EC-638Revision: October 2005
FUEL PUMP CIRCUIT
2005 QX56
Wiring DiagramUBS00HDD
BBWA1714E

Page 1830 of 3419

INFINITI QX4 2005  Factory Service Manual FUEL PUMP CIRCUIT
EC-639
C
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EC
Revision: October 20052005 QX56
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM gr

Page 1831 of 3419

INFINITI QX4 2005  Factory Service Manual EC-640Revision: October 2005
FUEL PUMP CIRCUIT
2005 QX56
3. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E122.
3. Turn ignition switch

Page 1832 of 3419

INFINITI QX4 2005  Factory Service Manual FUEL PUMP CIRCUIT
EC-641
C
D
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F
G
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EC
Revision: October 20052005 QX56
6. CHECK 15A FUSE
1. Turn ignition switch OFF.
2. Disconnect 15A fuse.
3. Check 15A fuse.
OK or NG
OK >> GO TO 7.
NG