2005 INFINITI QX4 Factory Service Manual

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INFINITI QX4 2005  Factory Service Manual EC-114Revision: October 2005
TROUBLE DIAGNOSIS
2005 QX56
Vacuum Hose DrawingUBS00L07
Refer to EC-23, "System Diagram"  for Vacuum Control System.
PBIB2052E

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INFINITI QX4 2005  Factory Service Manual TROUBLE DIAGNOSIS
EC-115
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Revision: October 20052005 QX56
Circuit DiagramUBS00L08
BBWA1788E

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INFINITI QX4 2005  Factory Service Manual EC-116Revision: October 2005
TROUBLE DIAGNOSIS
2005 QX56
BBWA1789E

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INFINITI QX4 2005  Factory Service Manual TROUBLE DIAGNOSIS
EC-117
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Revision: October 20052005 QX56
ECM Harness Connector Terminal LayoutUBS00L09
ECM Terminals and Reference ValueUBS00L0A
PREPARATION
1. ECM is located

Page 1309 of 3419

INFINITI QX4 2005  Factory Service Manual EC-118Revision: October 2005
TROUBLE DIAGNOSIS
2005 QX56
3LThrottle control motor relay 
power supply[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
4 L/W Throttle control motor (Close)[Ignition switc

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INFINITI QX4 2005  Factory Service Manual TROUBLE DIAGNOSIS
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Revision: October 20052005 QX56
14 YCamshaft position sensor 
(PHASE)[Engine is running]
Warm-up condition
Idle speed
NOTE:
The pulse cycle changes

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INFINITI QX4 2005  Factory Service Manual EC-120Revision: October 2005
TROUBLE DIAGNOSIS
2005 QX56
25 O/GHeated oxygen sensor 2 
heater (bank 2)[Engine is running]
Warm-up condition
Engine speed is below 3,600 rpm after the 
following condi

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INFINITI QX4 2005  Factory Service Manual TROUBLE DIAGNOSIS
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Revision: October 20052005 QX5647 YSensor power supply
(Throttle position sensor)[Ignition switch: ON]Approximately 5V
48 SBSensor power supply
(EVAP