Infiniti QX56 (Z62). Manual — part 506
EC-2
DIRECT INJECTION GASOLINE SYSTEM : Sys-
tem Description . . . . . . . . . . . . . ...
FUEL PRESSURE CONTROL . . . . . . . . ..
FUEL PRESSURE CONTROL : System Diagram
...
FUEL PRESSURE CONTROL : System Descrip-
tion . . . . . . . . . . . . . . . . . . ..
COOLING FAN CONTROL . . . . . . . . . ...
COOLING FAN CONTROL : System Diagram . ...
COOLING FAN CONTROL : System Description ...
ELECTRIC IGNITION SYSTEM . . . . . . . ....
ELECTRIC IGNITION SYSTEM :
System Diagram . . . . . . . . . . . . ....
ELECTRIC IGNITION SYSTEM : System De-
scription . . . . . . . . . . . . . . . . ..
INTAKE VALVE TIMING CONTROL . . . . . ....
INTAKE VALVE TIMING CONTROL : System Di-
agram . . . . . . . . . . . . . . . . . .
INTAKE VALVE TIMING CONTROL : System De-
scription . . . . . . . . . . . . . . . . ..
VVEL SYSTEM . . . . . . . . . . . . . . ..
VVEL SYSTEM : System Diagram . . . . . ....
VVEL SYSTEM : System Description . . . . . .
EVAPORATIVE EMISSION SYSTEM . . . . . ...
EVAPORATIVE EMISSION SYSTEM : System
Diagram . . . . . . . . . . . . . . . . ..
EVAPORATIVE EMISSION SYSTEM : System
Description . . . . . . . . . . . . . . . ..
AIR CONDITIONING CUT CONTROL . . . . . ..
AIR CONDITIONING CUT CONTROL : System
Diagram . . . . . . . . . . . . . . . . ..
AIR CONDITIONING CUT CONTROL : System
Description . . . . . . . . . . . . . . . ..
AUTOMATIC SPEED CONTROL DEVICE (ASCD) ...
AUTOMATIC SPEED CONTROL DEVICE (AS-
CD) : System Diagram . . . . . . . . . . ....
AUTOMATIC SPEED CONTROL DEVICE (AS-
CD) : System Description . . . . . . . . . ...
CAN COMMUNICATION . . . . . . . . . . ...
CAN COMMUNICATION : System Description . ..
OPERATION . . . . . . . . . . . . . ..
AUTMATIC SPEED CONTROL DEVICE (ASCD) ....
AUTMATIC SPEED CONTROL DEVICE (ASCD)
: Switch Name and Function . . . . . . . . ...
ON BOARD DIAGNOSTIC (OBD) SYSTEM . .
Diagnosis Description . . . . . . . . . . . .
GST (Generic Scan Tool) . . . . . . . . . ...
DIAGNOSIS SYSTEM (ECM) . . . . . . .
DIAGNOSIS DESCRIPTION . . . . . . . . . .
DIAGNOSIS DESCRIPTION : 1st Trip Detection
Logic and Two Trip Detection Logic . . . . . .
DIAGNOSIS DESCRIPTION : DTC and Freeze
Frame Data . . . . . . . . . . . . . . . .
DIAGNOSIS DESCRIPTION : Counter System . ..
DIAGNOSIS DESCRIPTION : Driving Pattern . .
DIAGNOSIS DESCRIPTION : System Readiness
Test (SRT) Code . . . . . . . . . . . . . .
DIAGNOSIS DESCRIPTION : Malfunction Indica-
tor Lamp (MIL) . . . . . . . . . . . . . .
On Board Diagnosis Function . . . . . . . . .
CONSULT-III Function . . . . . . . . . . .
ECU DIAGNOSIS INFORMATION . . . .
ECM . . . . . . . . . . . . . . . . ...
Reference Value . . . . . . . . . . . . . .
Fail-safe . . . . . . . . . . . . . . . . ..
DTC Inspection Priority Chart . . . . . . . . .
DTC Index . . . . . . . . . . . . . . . ...
Test Value and Test Limit . . . . . . . . ..
VVEL CONTROL MODULE . . . . . . . .
Reference Value . . . . . . . . . . . . ...
WIRING DIAGRAM . . . . . . . . ...
ENGINE CONTROL SYSTEM . . . . . . ..
Wiring Diagram . . . . . . . . . . . . . .
BASIC INSPECTION . . . . . . . . .
DIAGNOSIS AND REPAIR WORKFLOW . .
Work Flow . . . . . . . . . . . . . . . .
Diagnostic Work Sheet . . . . . . . . . . .
BASIC INSPECTION . . . . . . . . . .
Work Procedure . . . . . . . . . . . . .
ADDITIONAL SERVICE WHEN REPLACING
ECM . . . . . . . . . . . . . . . . ..
Description . . . . . . . . . . . . . . .
Work Procedure . . . . . . . . . . . . .
ADDITIONAL SERVICE WHEN REPLACING
VVEL CONTROL MODULE . . . . . . . .
Description . . . . . . . . . . . . . . .
Work Procedure . . . . . . . . . . . . .
VIN REGISTRATION . . . . . . . . . .
Description . . . . . . . . . . . . . . .
Work Procedure . . . . . . . . . . . . .
ACCELERATOR PEDAL RELEASED POSI-
TION LEARNING . . . . . . . . . . . ..
Description . . . . . . . . . . . . . . .
Work Procedure . . . . . . . . . . . . .
THROTTLE VALVE CLOSED POSITION
LEARNING . . . . . . . . . . . . . ...
EC-3
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Work Procedure . . . . . . . . . . . . .
IDLE AIR VOLUME LEARNING . . . . . ..
Description . . . . . . . . . . . . . . .
Work Procedure . . . . . . . . . . . . .
VVEL CONTROL SHAFT POSITION SEN-
SOR ADJUSTMENT . . . . . . . . . . .
Description . . . . . . . . . . . . . . .
Work Procedure . . . . . . . . . . . . .
MIXTURE RATIO SELF-LEARNING VALUE
CLEAR . . . . . . . . . . . . . . . ..
Description . . . . . . . . . . . . . . .
Work Procedure . . . . . . . . . . . . .
FUEL PRESSURE . . . . . . . . . . .
Work Procedure . . . . . . . . . . . . .
HOW TO SET SRT CODE . . . . . . . .
Description . . . . . . . . . . . . . . .
SRT Set Driving Pattern . . . . . . . . . .
Work Procedure . . . . . . . . . . . . .
DTC/CIRCUIT DIAGNOSIS . . . . . ...
TROUBLE DIAGNOSIS - SPECIFICATION
VALUE . . . . . . . . . . . . . . . ..
Description . . . . . . . . . . . . . . .
Component Function Check . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
POWER SUPPLY AND GROUND CIRCUIT .
Diagnosis Procedure . . . . . . . . . . . .
U0101 CAN COMM CIRCUIT . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
U1001 CAN COMM CIRCUIT . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
U0113, U1003 CAN COMM CIRCUIT . . . ..
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
U1024 CAN COMM CIRCUIT . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0011, P0021 IVT CONTROL . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Intake Valve Timing Con-
trol Solenoid Valve) . . . . . . . . . . . ...
P0031, P0032, P0051, P0052 A/F SENSOR 1
HEATER . . . . . . . . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (A/F Sensor 1 Heater) . ..
P0037, P0038, P0057, P0058 HO2S2 HEAT-
ER . . . . . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (HO2 Sensor 2 Heater) . .
P006A, P0101 MAF SENSOR . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (MAF Sensor) . . . . ...
P0075, P0081 IVT CONTROL SOLENOID
VALVE . . . . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Intake Valve Timing Con-
trol Solenoid Valve) . . . . . . . . . . . ...
P0087, P0088, P0090 FRP CONTROL SYS-
TEM . . . . . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
P008A LOW FUEL PRESSURE CONTROL
SYSTEM . . . . . . . . . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
P008B LOW FUEL PRESSURE CONTROL
SYSTEM . . . . . . . . . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
P0102, P0103 MAF SENSOR . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (MAF Sensor) . . . . ...
P0106 MANIFOLD ABSOLUTE PRESSURE
SENSOR . . . . . . . . . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (MAP Sensor) . . . . ...
P010A MANIFOLD ABSOLUTE PRESSURE
SENSOR . . . . . . . . . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (MAP Sensor) . . . . ...
P0112, P0113 IAT SENSOR . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Intake Air Temperature
Sensor) . . . . . . . . . . . . . . . . ..
P0116 ECT SENSOR . . . . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . ..
EC-4
Component Inspection (Engine Coolant Tempera-
ture Sensor) . . . . . . . . . . . . . . ...
P0117, P0118 ECT SENSOR . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Engine Coolant Tempera-
ture Sensor) . . . . . . . . . . . . . . ...
P0122, P0123 TP SENSOR . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Throttle Position Sensor) ..
P0125 ECT SENSOR . . . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Engine Coolant Tempera-
ture Sensor) . . . . . . . . . . . . . . ...
P0127 IAT SENSOR . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Intake Air Temperature
Sensor) . . . . . . . . . . . . . . . . ..
P0128 THERMOSTAT FUNCTION . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Engine Coolant Tempera-
ture Sensor) . . . . . . . . . . . . . . ...
P0130, P0150 A/F SENSOR 1 . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Component Function Check . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
P0131, P0151 A/F SENSOR 1 . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
P0132, P0152 A/F SENSOR 1 . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
P0133, P0153 A/F SENSOR 1 . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
P0137, P0157 HO2S2 . . . . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . ..
Component Function Check . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (HO2 sensor 2) . . . . .
P0138, P0158 HO2S2 . . . . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . ..
Component Function Check . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (HO2 sensor 2) . . . . .
P0139, P0159 HO2S2 . . . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Component Function Check . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (HO2 sensor 2) . . . .
P0171, P0174 FUEL INJECTION SYSTEM
FUNCTION . . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION . . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0181 FTT SENSOR . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Fuel Tank Temperature
Sensor) . . . . . . . . . . . . . . . . .
P0182, P0183 FTT SENSOR . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Fuel Tank Temperature
Sensor) . . . . . . . . . . . . . . . . .
P0190, P0192, P0193 FRP SENSOR . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Fuel Rail Pressure Sen-
sor) . . . . . . . . . . . . . . . . . .
P0191 FRP SENSOR . . . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Fuel Rail Pressure Sen-
sor) . . . . . . . . . . . . . . . . . .
P0196 EOT SENSOR . . . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Engine Oil Temperature
Sensor) . . . . . . . . . . . . . . . . .
P0197, P0198 EOT SENSOR . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Engine Oil Temperature
Sensor) . . . . . . . . . . . . . . . . .
P0201, P0202, P0203, P0204, P0205, P0206,
P0207, P0208 INJECTOR . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0222, P0223 TP SENSOR . . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
EC-5
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P0300, P0301, P0302, P0303, P0304, P0305,
P0306, P0307, P0308 MISFIRE . . . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0327, P0328, P0332, P0333 KS . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Knock Sensor) . . . .
P0335 CKP SENSOR . . . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Crankshaft Position Sen-
sor) . . . . . . . . . . . . . . . . . .
P0340, P0345 CMP SENSOR . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Camshaft Position Sen-
sor) . . . . . . . . . . . . . . . . . .
P0420, P0430 THREE WAY CATALYST
FUNCTION . . . . . . . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Component Function Check . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
P0441 EVAP CONTROL SYSTEM . . . . ..
DTC Logic . . . . . . . . . . . . . . . .
Component Function Check . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
P0443 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE . . . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (EVAP Canister Purge
Volume Control Solenoid Valve) . . . . . . ...
P0444, P0445 EVAP CANISTER PURGE
VOLUME CONTROL SOLENOID VALVE . ...
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (EVAP Canister Purge
Volume Control Solenoid Valve) . . . . . . ...
P0447 EVAP CANISTER VENT CONTROL
VALVE . . . . . . . . . . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (EVAP Canister Vent Con-
trol Valve) . . . . . . . . . . . . . . . ..
P0448 EVAP CANISTER VENT CONTROL
VALVE . . . . . . . . . . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (EVAP Canister Vent Con-
trol Valve) . . . . . . . . . . . . . . . ..
P0451 EVAP CONTROL SYSTEM PRES-
SURE SENSOR . . . . . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (EVAP Control System
Pressure Sensor) . . . . . . . . . . . . ...
P0452 EVAP CONTROL SYSTEM PRES-
SURE SENSOR . . . . . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (EVAP Control System
Pressure Sensor) . . . . . . . . . . . . ...
P0453 EVAP CONTROL SYSTEM PRES-
SURE SENSOR . . . . . . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (EVAP Control System
Pressure Sensor) . . . . . . . . . . . . ...
P0456 EVAP CONTROL SYSTEM . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection (Fuel Filler Cap) . . . .
P0460 FUEL LEVEL SENSOR . . . . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
P0461 FUEL LEVEL SENSOR . . . . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Component Function Check . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
P0462, P0463 FUEL LEVEL SENSOR . . ...
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
P0500 VSS . . . . . . . . . . . . . ..
Description . . . . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Component Function Check . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
P0506 ISC SYSTEM . . . . . . . . . .
Description . . . . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
P0507 ISC SYSTEM . . . . . . . . . .
Description . . . . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
P050E COLD START CONTROL . . . . ...
Description . . . . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
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