Fuel system INFINITI QX56 2008 Factory Service Manual

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QUICK REFERENCE INDEX
AGENERAL INFORMATIONGIGeneral Information
BENGINEEMEngine Mechanical
LUEngine Lubrication System
COEngine Cooling System
ECEngine Control System
FLFuel System
EXExhaust System
STRStarting System
ACCAccelerator Control System
CHYBRIDHBCHybrid Control System
HBBHybrid Battery System
HBRHybrid Brake System
DTRANSMISSION & DRIVE-
LINETMTransaxle & Transmission
DLNDriveline
FAXFront Axle
RAXRear Axle
ESUSPENSIONFSUFront Suspension
RSURear Suspension
SCSSuspension Control System
WTRoad Wheels & Tires
FBRAKESBRBrake System
PBParking Brake System
BRCBrake Control System
GSTEERINGSTSteering System
STCSteering Control System
HRESTRAINTSSBSeat Belt
SBCSeat Belt Control System
SRSRS Airbag
SRCSRS Airbag Control System
IVENTILATION, HEATER &
AIR CONDITIONERVTLVentilation System
HAHeater & Air Conditioning System
HACHeater & Air Conditioning Control System
JBODY INTERIORINTInterior
IPInstrument Panel
SESeat
ADPAutomatic Drive Postioner
APAdjustable Pedal
KBODY EXTERIOR,
DOORS, ROOF & VEHICLE
SECURITYDLKDoor & Lock
SECSecurity Control System
GWGlass & Window System
PWCPower Window Control System
RFRoof
EXTExterior
BRMBody Repair Manual
LDRIVER CONTROLSMIRMirrors
EXLExterior Lighting System
INLInterior Lighting System
WWWiper & Washer
DEFDefogger
HRNHorn
MELECTRICAL & POWER
CONTROLPWOPower Outlet
BCSBody Control System
LANLAN System
PCSPower Control System
CHGCharging System
PGPower Supply, Ground & Circuit Elements
NDRIVER INFORMATION &
MULTIMEDIAMWIMeter, Warning Lamp & Indicator
WCSWarning Chime System
SNSonar System
AVAudio, Visual & Navigation System
OCRUISE CONTROLCCSCruise Control System
PMAINTENANCEMAMaintenance
All rights reserved. No part
of this Service Manual may
be reproduced or stored in a
retrieval system, or transmit-
ted in any form, or by any
means, electronic, mechani-
cal, photo-copying, record-
ing or otherwise, without the
prior written permission of
Nissan North America, Inc.
Edition: May 2007
Revision: March 2010
Publication No. SM8E-1J60U2

2008
QUICK REFERENCE CHART: QX56
Front Disc Brake
INFOID:0000000006237753
Unit: mm (in)
Rear Disc BrakeINFOID:0000000006237754
Unit: mm (in)
Fluids and LubricantsINFOID:0000000006237752
Brake model AD41VA
Brake pad Standard thickness (new) 12.0 (0.476)
Repair limit thickness 1.0 (0.039)
Disc rotor Standard thickness (new) 30 (1.181)
Repair limit thickness 28 (1.102)
Maximum uneven wear (measured at 8 positions) 0.015 (0.0006)
Runout limit (with it attached to the vehicle) 0.03 (0.001)
Brake model
AD14VE
Brake pad Standard thickness (new) 12.0 (0.472)
Repair limit thickness 1.0 (0.039)
Disc rotor Standard thickness (new) 14.0 (0.551)
Repair limit thickness 12.5 (0.492)
Maximum uneven wear (measured at 8 positions) 0.015 (0.0006)
Runout limit (with it attached to the vehicle) 0.05 (0.002)
Description
Capacity (Approximate)
Metric US measure Imp measure
Fuel 105.8 28 gal 23 1/4 gal
Engine oil
Drain and refill With oil filter change
6.5 6 7/8 qt 5 3/4 qt
Without oil filter change 6.2 6 1/2 qt 5 1/2 qt
Dry engine (engine overhaul) 7.6 8 qt 6 3/4 qt
Cooling system With reservoir
at MAX level
14.4
15 1/4 qt 12 5/8 qt
Automatic transmission fluid (ATF) 10.6 11 1/4 qt 9 3/8 qt
Rear final drive oil 1.75 3 3/4 pt 3 1/8 pt
Transfer fluid 3.0 3 1/8 qt 2 5/8 qt
Front final drive oil 1.6 3 3/8 pt 2 7/8 pt
Power steering fluid (PSF) 1.0 1 1/8 qt 7/8 qt
Brake fluid — — —
Brake grease — — —
Multi-purpose grease — — —
Windshield washer fluid 4.9 5 1/8 qt 4 3/8 qt
Air conditioning system refrigerant 1.08 ± 0.05 kg 2.38 ± 0.11 lb 2.38 ± 0.11 lb
Air conditioning system oil 290 m9.8 fl oz 10.2 fl oz

AV
NORMAL OPERATING CONDITIONAV-153
< SYMPTOM DIAGNOSIS > [AUDIO SYSTEM]
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NORMAL OPERATING CONDITION
DescriptionINFOID:0000000001696149
AUDIO SYSTEM
The majority of the audio troubles are the result of outside causes (bad CD, electromagnetic interference,
etc.).
Noise
The following noise results from variations in field strength, such as fading noise and multi-path noise, or
external noise from trains and other sources. It is not a malfunction.
• Fading noise: This noise occurs because of variations in the field strength in a narrow range due to moun-
tains or buildings blocking the signal.
• Multi-path noise: This noise results from the waves sent directly from the broadcast station arriving at the antenna at a different time from the waves which reflect off mountains or buildings.
The vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunctioning.
Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and opera-
tion of each piece of electrical equipment, and determine the cause.
NOTE:
The source of the noise can be found easily by listening to the noise while removing the fuses of electrical
components, one by one.
Type of Noise and Possible Cause
NAVIGATION SYSTEM
Basic Operation
Vehicle Mark
Occurrence condition Possible cause
Occurs only when engine is ON. A continuous growling noise occurs. The speed of
the noise varies with changes in the engine speed. • Ignition components
The occurrence of the noise is linked with the operation of the fuel pump. • Fuel pump condenser
Noise only occurs when various
electrical components are oper-
ating. A cracking or snapping sound occurs with the op-
eration of various switches.
• Relay malfunction, audio unit malfunction
The noise occurs when various motors are operat-
ing. • Motor case ground
•Motor
The noise occurs constantly, not just under certain conditions. • Rear defogger coil malfunction
• Open circuit in printed heater
• Poor ground of antenna feeder line
A cracking or snapping sound occurs while the vehicle is being driven, especially when
it is vibrating excessively. • Ground wire of body parts
• Ground due to improper part installation
• Wiring connections or a short circuit
Symptom
Cause Remedy
No image is shown. Display brightness adjustment is set fully to DARK
side. Adjust the display brightness.
No guide sound is heard.
Audio guide volume is too low or
too high. Volume control is set to OFF, MIN or MAX. Adjust the audio guide volume.
Audio guidance is not available while the vehicle is
driving on a dark pink route.
System is not malfunctioning.
Screen is too dark.
Motion of the image is too slow. Temperature inside the vehicle is low.
Wait until the temperature inside the vehicle
reaches the proper temperature.
Small black or bright spots appear
on the screen. Symptom peculiar to a liquid crystal display (dis-
play unit). System is not malfunction.
Revision: March 2010
2008 QX56

TCS
BRC-15
< FUNCTION DIAGNOSIS > [VDC/TCS/ABS]
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TCS
System DiagramINFOID:0000000001691092
System DescriptionINFOID:0000000001686244
• Traction Control System is a function that electronically controls engine torque, brake fluid pressure and A/T gear position to ensure the optimum slippage ratio at drive wheels by computing wheel speed signals from 4
wheel sensors. When ABS actuator and electric unit (control unit) detects a spin at drive wheels (rear
wheels), it compares wheel speed signals from all 4 wheel s. At this time, LH and RH rear brake fluid pres-
sure are controlled, while fuel being cut to engine and throttle valve being closed to reduce engine torque by
the control unit. Further more, throttle position is continuously controlled to ensure the optimum engine
torque at all times.
• During TCS operation, it inform s driver of system operation by flashing SLIP indicator lamp.
• Electrical system diagnosis by CONSULT-III is available.
AWFIA0065GB
Revision: March 2010 2008 QX56

BRC-54
< COMPONENT DIAGNOSIS >[VDC/TCS/ABS]
C1130, C1131, C1132, C
1133, C1136 ENGINE SIGNAL
C1130, C1131, C1132, C1133, C1136 ENGINE SIGNAL
DescriptionINFOID:0000000001686302
ABS actuator and electric unit (control unit) and ECM exchange the engine signal with CAN communication
line.
DTC LogicINFOID:0000000001686303
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
Check the self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES >> Proceed to diagnosis procedure. Refer to BRC-54, "Diagnosis Procedure".
NO >> Inspection End
Diagnosis ProcedureINFOID:0000000001686304
INSPECTION PROCEDURE
1.CHECK ENGINE SYSTEM
1. Perform ECM self-diagnosis. Repair or replace it ems indicated, then perform ECM self-diagnosis again.
Refer to EC-63, "
CONSULT-III Function (ENGINE)".
2. Perform ABS actuator and electric unit (control unit) self-diagnosis. Refer to BRC-24, "
CONSULT-III Func-
tion (ABS)".
Is any item indicated on the self-diagnosis display?
YES >> Repair or replace the affected part.
NO >> Inspection End
Special Repair RequirementINFOID:0000000001691153
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform neutral position adjustment for the st eering angle sensor when replacing the ABS actuator
and electric unit (control unit). Refer to BRC-8, "
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL
POSITION : Description".
>> GO TO 2
DTC Display item Malfunction detected condition Possible cause
C1130 ENGINE SIGNAL 1
Based on the signal from ECM, ABS actuator and electric
unit (control unit) judges that engine fuel cut system is
malfunctioning. • Harness or connector
• ABS actuator and electric unit
(control unit)
•ECM
• CAN communication line
C1131 ENGINE SIGNAL 2
C1132 ENGINE SIGNAL 3
C1133 ENGINE SIGNAL 4
C1136 ENGINE SIGNAL 6
Self-diagnosis results
ENGINE SIGNAL 1
ENGINE SIGNAL 2
ENGINE SIGNAL 3
ENGINE SIGNAL 4
ENGINE SIGNAL 6
Revision: March 2010 2008 QX56

CCS
INSPECTION AND ADJUSTMENTCCS-5
< BASIC INSPECTION >
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INSPECTION AND ADJUSTMENT
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
ADDITIONAL SERVICE WHEN REPL ACING CONTROL UNIT : Description
INFOID:0000000001731800
Always perform the laser beam aiming adjustment after repl acing the ICC unit. In addition, test the ICC sys-
tem operations to see if it functions normally.
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Re-
quirement
INFOID:0000000001731801
1.LASER BEAM AIMING ADJUSTMENT
Adjust laser beam aiming. Refer to CCS-5, "
LASER BEAM AIMING ADJUSTMENT : Outline of Laser Beam
Aiming Adjustment Procedure".
>> GO TO 2
2.ICC SYSTEM ACTION TEST
1. Perform the ICC system operation test. Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
2. Check that the ICC system operates normally.
>> INSPECTION END.
LASER BEAM AIMI NG ADJUSTMENT
LASER BEAM AIMING ADJUSTMENT : Outlin e of Laser Beam Aiming Adjustment
Procedure
INFOID:0000000001756724
CAUTION:
• The laser beam aiming adjustment can not be performed without CONSULT-III.
• The laser beam aiming adjustment must be performed every time the ICC sensor is removed,
installed or has been moved as a result of a collision.
1. Prepare the vehicle and the work area.
2. Set up the ICC target board. For details, refer to Technical Service Bulletin.
3. Adjust the sensor following the procedure on CONSULT-III.
4. Check system operation after the adjustment.
LASER BEAM AIMING ADJU STMENT : PreparationINFOID:0000000001756725
• Place the vehicle on level ground. Shift the transmi ssion into "P" position and release the parking brake.
• Adjust the tire pressure to the specified value.
• See that there is no load in the vehicle. Coolant , engine oil and fuel should be filled to correct level.
• Check that the vehicle suspension has been adjusted to the standard height by the load leveling rear air sus-
pension system. Refer to SCS-7, "
CONSULT-III Function" .
• Clean the sensor with a soft cloth. Tool number : KV99110100 (J-45718)
LKIA0632E
Revision: March 2010
2008 QX56

CHG
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
CHG-9
< FUNCTION DIAGNOSIS >
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POWER GENERATION VOLTAG
E VARIABLE CONTROL SYSTEM
System DiagramINFOID:0000000001696181
System DescriptionINFOID:0000000001696182
Power generation variable voltage control system has been adopted. By varying the voltage to the generator,
engine load due to power generation of the generator is reduced and fuel consumption is decreased.
NOTE:
When any malfunction is detected in the power generat ion variable voltage control system, power generation
is performed according to the characterist ic of the IC regulator in the generator.
Component DescriptionINFOID:0000000001696183
ALMIA0057GB
Component part Description
Battery current sensor The battery current sensor is installed on the battery cable at the
negative terminal. The battery current sensor detects the charg-
ing/discharging current of the battery and sends a voltage signal
to the ECM according to the current value detected.
ECM The battery current sensor detects the charging/discharging cur-
rent of the battery. The ECM judges the battery condition based on
this signal.
The ECM judges whether to request more output via the power
generation voltage variable control according to the battery condi-
tion.
When performing the power generation voltage variable control,
the ECM calculates the target power generation voltage according
to the battery condition and sends the calculated value as the pow-
er generation command value to the IPDM E/R.
IPDM E/R The IPDM E/R converts the received power generation command
value into a pulse width modulated (PWM) command signal and
sends it to the IC regulator.
Generator (IC regulator) The IC regulator controls the power generation voltage by the tar-
get power generation voltage based on the received PWM com-
mand signal.
When there is no PWM command signal, the generator performs
the normal power generation according to the characteristic of the
IC regulator.
Revision: March 2010
2008 QX56

EC-1
ENGINE
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CONTENTS
ENGINE CONTROL SYSTEM
VK56DE
BASIC INSPECTION ....... .............................
8
DIAGNOSIS AND REPAIR WORKFLOW ..... .....8
Trouble Diagnosis Introduction ........................... ......8
INSPECTION AND ADJUSTMENT ....................13
Basic Inspection .................................................. ....13
Idle Speed and Ignition Timing Check ....................17
Procedure After Replacing ECM .............................17
VIN Registration ......................................................17
Accelerator Pedal Released Position Learning .......18
Throttle Valve Closed Position Learning .................18
Idle Air Volume Learning .........................................18
FUNCTION DIAGNOSIS ..............................21
ENGINE CONTROL SYSTEM ........................ ....21
System Diagram .................................................. ....21
Engine Control Component Parts Location .............22
MULTIPORT FUEL INJECTION SYSTEM ..... ....28
System Description ............................................. ....28
ELECTRIC IGNITION SYSTEM ..................... ....31
System Description ............................................. ....31
AIR CONDITIONING CUT CONTROL ...............32
Input/Output Signal Chart .................................... ....32
System Description .................................................32
AUTOMATIC SPEED CONTROL DEVICE
(ASCD) ...............................................................
33
System Description ............................................. ....33
Component Description ...........................................34
CAN COMMUNICATION ....................................35
System Description ............................................. ....35
COOLING FAN CONTROL ................................36
Description ..............................................................36
EVAPORATIVE EMISSION SYSTEM ...............37
Description ........................................................... ....37
INTAKE VALVE TIMING CONTROL ................40
Description ...............................................................40
ON BOARD DIAGNOSTIC (OBD) SYSTEM ....41
Introduction ..............................................................41
Two Trip Detection Logic .........................................41
Emission-related Diagnostic Information .................42
Malfunction Indicator Lamp (MIL) ............................55
OBD System Operation Chart .................................58
CONSULT-III Function (ENGINE) ...........................63
Generic Scan Tool (GST) Function .........................72
COMPONENT DIAGNOSIS .........................75
TROUBLE DIAGNOSIS - SPECIFICATION
VALUE ...............................................................
75
Description ........................................................... ....75
Testing Condition .....................................................75
Inspection Procedure ...............................................75
Diagnosis Procedure ...............................................76
POWER SUPPLY AND GROUND CIRCUIT ....83
Diagnosis Procedure ...............................................83
Ground Inspection ...................................................86
U1000, U1001 CAN COMM CIRCUIT ...............87
Description ...............................................................87
On Board Diagnosis Logic .......................................87
DTC Confirmation Procedure ..................................87
Diagnosis Procedure ...............................................87
U1010 CONTROL UNIT (CAN) .........................88
Description ...............................................................88
On Board Diagnosis Logic .......................................88
DTC Confirmation Procedure ..................................88
Diagnosis Procedure ...............................................88
P0011, P0021 IVT CONTROL ...........................90
On Board Diagnosis Logic .......................................90
Revision: March 2010 2008 QX56

EC-3
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Diagnosis Procedure ...........................................
..
160
Component Inspection ..........................................162
P0138, P0158 HO2S2 ......................................164
Component Description ....................................... ..164
On Board Diagnosis Logic ....................................164
DTC Confirmation Procedure ................................164
Overall Function Check .........................................165
Diagnosis Procedure .............................................166
Component Inspection ..........................................169
P0139, P0159 HO2S2 ......................................171
Component Description ....................................... ..171
On Board Diagnosis Logic ....................................171
DTC Confirmation Procedure ................................171
Overall Function Check .........................................172
Diagnosis Procedure .............................................172
Component Inspection ..........................................174
P0171, P0174 FUEL INJECTION SYSTEM
FUNCTION .......................................................
176
On Board Diagnosis Logic .................................. ..176
DTC Confirmation Procedure ................................176
Diagnosis Procedure .............................................179
P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION .......................................................
182
On Board Diagnosis Logic .................................. ..182
DTC Confirmation Procedure ................................182
Diagnosis Procedure .............................................185
P0181 FTT SENSOR ........................................188
Component Description ....................................... ..188
On Board Diagnosis Logic ....................................188
DTC Confirmation Procedure ................................188
Diagnosis Procedure .............................................189
Component Inspection ..........................................190
P0182, P0183 FTT SENSOR ...........................191
Component Description ....................................... ..191
On Board Diagnosis Logic ....................................191
DTC Confirmation Procedure ................................191
Diagnosis Procedure .............................................191
Component Inspection ..........................................193
P0222, P0223 APP SENSOR ...........................194
Component Description .........................................194
On Board Diagnosis Logic ....................................194
DTC Confirmation Procedure ................................194
Diagnosis Procedure .............................................194
Component Inspection ..........................................197
P0300, P0301, P0302, P0303, P0304, P0305,
P0306, P0307, P0308 MISFIRE .......................
198
On Board Diagnosis Logic .................................. ..198
DTC Confirmation Procedure ................................198
Diagnosis Procedure .............................................199
P0327, P0328, P0332, P0333 KS ....................204
Component Description ....................................... ..204
On Board Diagnosis Logic ....................................204
DTC Confirmation Procedure .............................. ..204
Diagnosis Procedure .............................................204
Component Inspection ...........................................206
P0335 CKP SENSOR (POS) ...........................207
Component Description .........................................207
On Board Diagnosis Logic .....................................207
DTC Confirmation Procedure ................................207
Diagnosis Procedure .............................................208
Component Inspection ...........................................209
P0340 CMP SENSOR (PHASE) .....................211
Component Description .........................................211
On Board Diagnosis Logic .....................................211
DTC Confirmation Procedure ................................211
Diagnosis Procedure .............................................212
Component Inspection ...........................................213
P0420, P0430 THREE WAY CATALYST
FUNCTION ......................................................
215
On Board Diagnosis Logic ................................... ..215
DTC Confirmation Procedure ................................215
Overall Function Check .........................................216
Diagnosis Procedure .............................................216
P0441 EVAP CONTROL SYSTEM .................219
System Description ................................................219
On Board Diagnosis Logic .....................................219
DTC Confirmation Procedure ................................219
Overall Function Check .........................................220
Diagnosis Procedure .............................................220
P0442 EVAP CONTROL SYSTEM .................224
On Board Diagnosis Logic .....................................224
DTC Confirmation Procedure ................................224
Diagnosis Procedure .............................................225
Component Inspection ...........................................230
P0443 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE ......................
231
Description .............................................................231
On Board Diagnosis Logic .....................................231
DTC Confirmation Procedure ................................231
Diagnosis Procedure .............................................232
Component Inspection ...........................................234
P0444, P0445 EVAP CANISTER PURGE
VOLUME CONTROL SOLENOID VALVE ......
236
Description .............................................................236
On Board Diagnosis Logic .....................................236
DTC Confirmation Procedure ................................237
Diagnosis Procedure .............................................237
Component Inspection ...........................................238
P0447 EVAP CANISTER VENT CONTROL
VALVE .............................................................
239
Component Description .........................................239
On Board Diagnosis Logic .....................................239
DTC Confirmation Procedure ................................239
Diagnosis Procedure .............................................239
Revision: March 2010 2008 QX56

EC-4
Component Inspection ...........................................241
P0448 EVAP CANISTER VENT CONTROL
VALVE .............................................................
243
Component Description ....................................... ..243
On Board Diagnosis Logic .....................................243
DTC Confirmation Procedure ................................243
Diagnosis Procedure .............................................244
Component Inspection ...........................................245
P0451 EVAP CONTROL SYSTEM PRES-
SURE SENSOR ...............................................
247
Component Description ....................................... ..247
On Board Diagnosis Logic .....................................247
DTC Confirmation Procedure ................................247
Diagnosis Procedure .............................................247
Component Inspection ...........................................248
P0452 EVAP CONTROL SYSTEM PRES-
SURE SENSOR ...............................................
250
Component Description ....................................... ..250
On Board Diagnosis Logic .....................................250
DTC Confirmation Procedure ................................250
Diagnosis Procedure .............................................251
Component Inspection ...........................................253
P0453 EVAP CONTROL SYSTEM PRES-
SURE SENSOR ...............................................
254
Component Description ....................................... ..254
On Board Diagnosis Logic .....................................254
DTC Confirmation Procedure ................................254
Diagnosis Procedure .............................................255
Component Inspection ...........................................258
P0455 EVAP CONTROL SYSTEM ..................259
On Board Diagnosis Logic ................................... ..259
DTC Confirmation Procedure ................................259
Diagnosis Procedure .............................................260
Component Inspection ...........................................264
P0456 EVAP CONTROL SYSTEM ..................266
On Board Diagnosis Logic ................................... ..266
DTC Confirmation Procedure ................................267
Overall Function Check .........................................267
Diagnosis Procedure .............................................268
Component Inspection ...........................................272
P0460 FUEL LEVEL SENSOR ........................274
Component Description ....................................... ..274
On Board Diagnosis Logic .....................................274
DTC Confirmation Procedure ................................274
Diagnosis Procedure .............................................274
P0461 FUEL LEVEL SENSOR ........................276
Component Description ....................................... ..276
On Board Diagnosis Logic .....................................276
Overall Function Check .........................................276
Diagnosis Procedure .............................................277
P0462, P0463 FUEL LEVEL SENSOR ...........278
Component Description ....................................... ..278
On Board Diagnosis Logic ................................... .278
DTC Confirmation Procedure ................................278
Diagnosis Procedure .............................................278
P0500 VSS ........................................................280
Description ........................................................... .280
On Board Diagnosis Logic ....................................280
DTC Confirmation Procedure ................................280
Overall Function Check .........................................281
Diagnosis Procedure .............................................281
P0506 ISC SYSTEM .........................................282
Description ........................................................... .282
On Board Diagnosis Logic ....................................282
DTC Confirmation Procedure ................................282
Diagnosis Procedure .............................................282
P0507 ISC SYSTEM .........................................284
Description ........................................................... .284
On Board Diagnosis Logic ....................................284
DTC Confirmation Procedure ................................284
Diagnosis Procedure .............................................284
P0550 PSP SENSOR .......................................286
Component Description ....................................... .286
On Board Diagnosis Logic ....................................286
DTC Confirmation Procedure ................................286
Diagnosis Procedure .............................................286
Component Inspection ..........................................288
P0603 ECM POWER SUPPLY .........................289
Description ........................................................... .289
DTC Logic .............................................................289
Diagnosis Procedure .............................................289
P0605 ECM .......................................................291
Component Description ....................................... .291
On Board Diagnosis Logic ....................................291
DTC Confirmation Procedure ................................291
Diagnosis Procedure .............................................292
P0643 SENSOR POWER SUPPLY ..................293
On Board Diagnosis Logic ....................................293
DTC Confirmation Procedure ................................293
Diagnosis Procedure .............................................293
P0850 PNP SWITCH ........................................296
Component Description ........................................296
On Board Diagnosis Logic ....................................296
DTC Confirmation Procedure ................................296
Overall Function Check .........................................296
Diagnosis Procedure .............................................297
P1140, P1145 IVT CONTROL POSITION
SENSOR ...........................................................
299
Component Description ....................................... .299
On Board Diagnosis Logic ....................................299
DTC Confirmation Procedure ................................299
Diagnosis Procedure .............................................299
Component Inspection ..........................................302
Revision: March 2010 2008 QX56