2006 INFINITI QX56 Factory Service Manual

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INFINITI QX56 2006  Factory Service Manual EC-22Revision: November 2009
PREPARATION
2006 QX56
Commercial Service ToolsUBS00KZ5
Tool name
(Kent-Moore No.)Description
Leak detector 
i.e.: (J-41416) Locating the EVAP leak
EVAP service port 
adapt

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INFINITI QX56 2006  Factory Service Manual ENGINE CONTROL SYSTEMEC-23
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Revision: November 2009 2006 QX56
ENGINE CONTROL SYSTEMPFP:23710
System DiagramUBS00KZ6
PBIB2051E

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INFINITI QX56 2006  Factory Service Manual EC-24Revision: November 2009
ENGINE CONTROL SYSTEM
2006 QX56
Multiport Fuel Injection (MFI) SystemUBS00KZ7
INPUT/OUTPUT SIGNAL CHART
*1: This sensor is not used to control the engine system. This is u

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INFINITI QX56 2006  Factory Service Manual ENGINE CONTROL SYSTEMEC-25
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MIXTURE RATIO FEEDBACK CONTROL (CLOSED LOOP CONTROL)
The mixture ratio feedback system provides the best air-fuel

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INFINITI QX56 2006  Factory Service Manual EC-26Revision: November 2009
ENGINE CONTROL SYSTEM
2006 QX56
FUEL INJECTION TIMING
Two types of systems are used.
Sequential Multiport Fuel Injection System
Fuel is injected into each cylinder during

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INFINITI QX56 2006  Factory Service Manual ENGINE CONTROL SYSTEMEC-27
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During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing i

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INFINITI QX56 2006  Factory Service Manual EC-28Revision: November 2009
AIR CONDITIONING CUT CONTROL
2006 QX56
AIR CONDITIONING CUT CONTROLPFP:23710
Input/Output Signal ChartUBS00KZA
*1: This signal is sent to the ECM through CAN communication

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INFINITI QX56 2006  Factory Service Manual AUTOMATIC SPEED CONTROL DEVICE (ASCD)EC-29
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Revision: November 2009 2006 QX56
AUTOMATIC SPEED CONTROL DEVICE (ASCD)PFP:18930
System DescriptionUBS00KZC
INPUT/OUTPUT SIGNAL CHA