2007 INFINITI QX56 sensor

DI-50
< SERVICE INFORMATION >
REAR SONAR SYSTEM
Sonar Control Unit Harness Connector Terminal Layout
INFOID:0000000003533527
Terminal and Reference Value for Sonar Control UnitINFOID:0000000003533528
WKIA5222E
Te r m i n a l
(color)ItemCondition
Reference value (V)
(Approx.) Ignition
switchOperation
3 (R) Sonar buzzer return ON — 0 - 12 (variable)
4 (BR/Y)Rear sonar system
OFF indicator outputONRear sonar system OFF
switch ON 0
OFF Battery voltage
5 (G/W) Reverse signal ONTransmission gear se-
lector leverR position Battery voltage
Transmission gear se-
lector leverNot R position 0
6 (B)Sonar control unit
ground —— 0
7 (L) Sonar buzzer drive
signalON — Battery voltage
8 (G/R)Sonar control unit
powerON — Battery voltage
9 (GR)Rear sonar sensor
signal - RH outerON• Rear sonar system OFF switch ON
• Transmission gear selector lever in R po-
sition
• No obstaclesBattery voltage
10 (P)Rear sonar sensor
signal - LH outerON• Rear sonar system OFF switch ON
• Transmission gear selector lever in R po-
sition
• No obstaclesBattery voltage
11 ( O )Rear sonar sensor
signal - LH innerON• Rear sonar system OFF switch ON
• Transmission gear selector lever in R po-
sition
• No obstaclesBattery voltage
12 (LG)Rear sonar sensor
signal - RH innerON• Rear sonar system OFF switch ON
• Transmission gear selector lever in R po-
sition
• No obstaclesBattery voltage
13 (LG)Rear sonar system
OFF switch signalONRear sonar system OFF
switchON 0
OFF Battery voltage
15 (Y)Rear sonar sensor
groundON — 0
16 (LG/B)Rear sonar sensor
powerON Ignition switch ON Battery voltage

REAR SONAR SYSTEM
DI-51
< SERVICE INFORMATION >
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How to Proceed with Trouble DiagnosisINFOID:0000000003533529
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to DI-46, "
System Description".
3. Perform pre-diagnosis inspection. Refer to DI-51, "
Pre-diagnosis Inspection".
4. Perform self-diagnosis. Refer to DI-51, "
Self-Diagnosis Function".
5. Perform the preliminary check. Refer to DI-53, "
Preliminary Check".
6. Check symptom and repair or replace the cause of malfunction. Refer to DI-54, "
Symptom Chart".
7. Does the rear sonar system operate properly? If so, go to 8. If not, go to 3.
8. Clear fault codes. Refer to DI-51, "
Self-Diagnosis Function".
9. Inspection End.
Pre-diagnosis InspectionINFOID:0000000003533530
SENSOR STATUS CHECK
• Check that the rear sonar sensor is properly aligned (bumper is not misaligned, no deformation in sensor
mounting area.
• Check that snow, mud, or other foreign objects are not adhering to the rear sonar sensor.
• Check that there is no deformation, scratches, or other damage to the rear sonar sensor.
• Check that water has not accumulated in the rear sonar sensor.
CAUTION:
Use water, cotton swab, or other soft material for cleaning the sensor.
1. Check that there are no obstacles within each rear sonar sensor's detection range.
2. Check that there are no nearby ultrasound sources (such as the sounds of vehicle horns, motorcycle
engines, or truck air brakes).
3. Check that the vehicle is on a level surface.
Self-Diagnosis FunctionINFOID:0000000003533531
There are four modes of self-diagnosis; entering diagnostics, requesting number of fault codes, requesting
fault codes, and idling or clearing fault codes. These steps must be followed in order. Self-diagnosis can be
manually exited by turning the ignition switch OFF, or selecting reverse gear. Self-diagnosis will exit unless a
fault code request occurs before a message is repeated five times without acknowledgement.
ENTERING DIAGNOSTICS MODE
1. Turn ignition switch ON. Rear sonar system OFF switch indica-
tor lamp illuminates for three seconds and then turns off.
2. Immediately push rear sonar system OFF switch ten times
within five seconds.
3. The sonar buzzer will sound once and the rear sonar system
OFF indicator will flash once.
REQUESTING NUMBER OF FAULT CODES MODE
Detection range
Rear sonar sensors Approx. 1.8 m (5.9 ft.) maximum
LKIA0389E

DI-52
< SERVICE INFORMATION >
REAR SONAR SYSTEM
1. While in diagnostic mode, push rear sonar system OFF switch
once.
2. The sonar buzzer will sound once.
3. Rear sonar system OFF indicator will flash once and sonar
buzzer will sound once for each fault code detected.
4. There will be a four second pause.
5. The number of fault codes will repeat five times then pause.
NOTE:
Self-diagnosis will exit unless requesting fault codes occurs
before five repeats ends.
REQUESTING FAULT CODES MODE
1. While in "requesting number of fault codes" mode, push rear
sonar system OFF switch once.
2. The sonar buzzer will sound once.
3. Rear sonar system OFF indicator will flash and sonar buzzer will
sound the first digit of the fault code followed by a one second
pause.
4. Rear sonar system OFF indicator will flash and sonar buzzer will
sound the second digit of the fault code followed by a four sec-
ond pause.
5. The fault codes will repeat five times then pause.
NOTE:
Requesting fault codes will exit unless the fault code is acknowledged before five repeats ends.
The fault code is acknowledged by pushing the rear sonar system OFF switch once (the sonar buzzer
may sound). When all fault codes have been indicated, idle mode will be entered. See the following table
for fault code identification.
IDLING OR CLEARING FAULT CODES MODE
NOTE:
While in idle mode, self-diagnosis will automatically exit if no activity occurs for thirty seconds.
LKIA0388E
Fault Code Malfunction Page Reference
1 1Rear sonar sensor LH
outer
Check harness for open
or short. If NG repair or re-
place harness. If OK re-
place sensor. Refer to DI-
55, "Removal and Installa-
tion". 1 2Rear sonar sensor LH in-
ner
1 3Rear sonar sensor RH in-
ner
1 4Rear sonar sensor RH
outer
2 1 Sonar buzzerDI-55, "
Component In-
spection"
2 2Rear sonar system OFF
indicatorDI-55, "Component In-
spection"
2 3Rear sonar system OFF
switchDI-55, "Component In-
spection"
2 4 Sonar control unitReplace sonar control
unit. Refer to DI-55, "Re-
moval and Installation".
LKIA0390E

DI-54
< SERVICE INFORMATION >
REAR SONAR SYSTEM
Symptom Chart
INFOID:0000000003533533
Symptom Repair order
When the rear sonar system OFF switch is OFF, the indicator
lamp does not light and the buzzer does not sound.1. Check rear sonar system OFF switch for malfunction. Refer
to DI-55, "
Component Inspection".
2. Check rear sonar system OFF switch ground circuit.
3. Check harness and connections between rear sonar system
OFF switch and sonar control unit.
4. Replace sonar control unit. Refer to DI-55, "
Removal and In-
stallation".
When the rear sonar system OFF switch is OFF, the indicator
lamp does not light but buzzer sounds.1. Check rear sonar system OFF indicator for malfunction. Re-
fer to DI-55, "
Component Inspection".
2. Check harness and connections between rear sonar system
OFF indicator and sonar control unit.
3. Replace sonar control unit. Refer to DI-55, "
Removal and In-
stallation".
When the rear sonar system OFF switch is OFF, the sonar buzzer
does not sound but indicator lamp illuminates.1. Check sonar buzzer. Refer to DI-55, "
Component Inspec-
tion".
2. Check harness and connections between sonar buzzer and
sonar control unit.
3. Replace sonar control unit. Refer to: DI-55, "
Removal and
Installation".
When rear sonar system OFF switch is ON, the rear sonar system
OFF indicator lamp lights up and the sonar buzzer sounds inter-
mittently (for about 4 seconds).1. Check harness between rear sonar sensors and sonar con-
trol unit for an open condition.
2. Check rear sonar sensors for malfunction.
3. Replace sonar control unit. Refer to DI-55, "
Removal and In-
stallation".
The rear sonar system operates with the rear sonar system OFF
switch OFF.1. Check rear sonar system OFF switch for malfunction. Refer
to DI-55, "
Component Inspection".
2. Check rear sonar system OFF switch ground circuit.
3. Check harness and connections between rear sonar system
OFF switch and sonar control unit.
4. Replace sonar control unit. Refer to DI-55, "
Removal and In-
stallation".
When the transmission gear selector lever is in the R position and
the rear sonar system OFF switch is OFF, the sonar system does
not operate.1. Check for PNP switch failure. Refer to AT- 8 3 , "
CONSULT-II
Function (A/T)".
2. Check harness and connections between sonar control unit
and PNP/reverse lamp circuits.
3. Replace sonar control unit. Refer to DI-55, "
Removal and In-
stallation".
When the rear sonar system OFF switch is OFF, the indicator
lamp lights up and buzzer sounds although there is no obstacle
within the detection range.1. Check for adhesion of snow, mud, or other foreign objects to
rear sonar sensors; dew condensation; etc. Refer to DI-51,
"Pre-diagnosis Inspection".
2. Check that the rear sonar sensor is properly aligned
(bumper is not misaligned, no deformation in sensor mount-
ing area
3. Check harness and connections between rear sonar sen-
sors and sonar control unit.
4. Check rear sonar sensors for malfunction.
5. Replace sonar control unit. Refer to DI-55, "
Removal and In-
stallation".
The rear sonar sensors do not operate according to the distance
between each sensor and the obstacle. (There is a large error in
the obstacle detection distance.1. Check rear sonar sensors for malfunction.
2. Replace sonar control unit. Refer to DI-55, "
Removal and In-
stallation".
3. Check for adhesion of snow, mud, or other foreign objects to
rear sonar sensors; dew condensation; etc. Refer to DI-51,
"Pre-diagnosis Inspection".
4. Check that the rear sonar sensor is properly aligned
(bumper is not misaligned, no deformation in sensor mount-
ing area

REAR SONAR SYSTEM
DI-55
< SERVICE INFORMATION >
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Component InspectionINFOID:0000000003533534
SONAR BUZZER
1. Disconnect the sonar buzzer connector.
2. Check continuity between buzzer terminal (+) and terminal (-)
REAR SONAR SYSTEM OFF SWITCH
Disconnect the rear sonar system OFF switch connector M116.
Check continuity between the following terminals.
REAR SONAR SYSTEM OFF INDICATOR
Disconnect the rear sonar system OFF switch connector M116, and
apply battery voltage (approx. 12V) to switch terminal 5. Check the
rear sonar system OFF indicator operation when switch terminal 6 is
connected to battery ground.
Removal and InstallationINFOID:0000000003533535
REAR SONAR SENSORS
Refer to EI-14, "Removal and Installation" for rear sonar sensor removal and installation procedures.
SONAR CONTROL UNIT
Removal
1. Remove luggage side finisher LH. Refer to EI-39 to gain access to sonar control unit.
2. Disconnect electrical connector then remove sonar control unit. Refer to DI-46, "
Component Parts and
Harness Connector Location".
Installation
Installation is in the reverse order of removal.(+) - (-) : Continuity should exist
WKIA2024E
Rear sonar system OFF
switch Terminal to be inspected Continuity
Depressed
1 - 2Ye s
Released No
WKIA2025E
Terminal to be in-
spectedCondition Operation
Rear sonar sys-
tem OFF switch5 Approx. 12V Rear sonar
system OFF
indicator lights 6Ground
WKIA2026E

EC-2
CONSULT-II Function (ENGINE) ..........................111
Generic Scan Tool (GST) Function .......................122
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
124
Major Sensor Reference Graph in Data Monitor
Mode ......................................................................
127
TROUBLE DIAGNOSIS - SPECIFICATION
VALUE .............................................................
129
Description .............................................................129
Testing Condition ...................................................129
Inspection Procedure .............................................129
Diagnosis Procedure .............................................130
TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT ........................................................
138
Description .............................................................138
Diagnosis Procedure .............................................138
POWER SUPPLY AND GROUND CIRCUIT ...139
Wiring Diagram ......................................................139
Diagnosis Procedure .............................................140
Ground Inspection .................................................143
DTC U1000, U1001 CAN COMMUNICATION
LINE .................................................................
145
Description .............................................................145
On Board Diagnosis Logic .....................................145
DTC Confirmation Procedure ................................145
Wiring Diagram ......................................................146
Diagnosis Procedure .............................................146
DTC U1010 CAN COMMUNICATION .............147
Description .............................................................147
On Board Diagnosis Logic .....................................147
DTC Confirmation Procedure ................................147
Diagnosis Procedure .............................................147
DTC P0011, P0021 IVT CONTROL .................149
Description .............................................................149
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
150
On Board Diagnosis Logic .....................................150
DTC Confirmation Procedure ................................150
Wiring Diagram ......................................................152
Diagnosis Procedure .............................................155
Component Inspection ...........................................159
Removal and Installation .......................................160
DTC P0031, P0032, P0051, P0052 A/F SEN-
SOR 1 HEATER ...............................................
163
Description .............................................................163
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
163
On Board Diagnosis Logic .....................................163
DTC Confirmation Procedure ................................163
Wiring Diagram ......................................................164
Diagnosis Procedure .............................................167
Component Inspection ...........................................168
Removal and Installation .......................................169
DTC P0037, P0038, P0057, P0058 HO2S2
HEATER ...........................................................
170
Description ............................................................170
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
170
On Board Diagnosis Logic ....................................170
DTC Confirmation Procedure ................................170
Wiring Diagram .....................................................172
Diagnosis Procedure .............................................175
Component Inspection ..........................................176
Removal and Installation .......................................177
DTC P0075, P0081 IVT CONTROL SOLE-
NOID VALVE ....................................................
178
Component Description ........................................178
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
178
On Board Diagnosis Logic ....................................178
DTC Confirmation Procedure ................................178
Wiring Diagram .....................................................179
Diagnosis Procedure .............................................182
Component Inspection ..........................................183
Removal and Installation .......................................184
DTC P0101 MAF SENSOR ..............................186
Component Description ........................................186
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
186
On Board Diagnosis Logic ....................................186
DTC Confirmation Procedure ................................186
Overall Function Check .........................................188
Wiring Diagram .....................................................189
Diagnosis Procedure .............................................190
Component Inspection ..........................................192
Removal and Installation .......................................193
DTC P0102, P0103 MAF SENSOR ..................194
Component Description ........................................194
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
194
On Board Diagnosis Logic ....................................194
DTC Confirmation Procedure ................................194
Wiring Diagram .....................................................196
Diagnosis Procedure .............................................197
Component Inspection ..........................................199
Removal and Installation .......................................200
DTC P0112, P0113 IAT SENSOR ....................201
Component Description ........................................201
On Board Diagnosis Logic ....................................201
DTC Confirmation Procedure ................................201
Wiring Diagram .....................................................202
Diagnosis Procedure .............................................202
Component Inspection ..........................................204
Removal and Installation .......................................204
DTC P0117, P0118 ECT SENSOR ...................205
Component Description ........................................205
On Board Diagnosis Logic ....................................205
DTC Confirmation Procedure ................................206

EC-3
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207
Diagnosis Procedure .............................................207
Component Inspection ..........................................209
Removal and Installation .......................................209
DTC P0122, P0123 TP SENSOR .....................210
Component Description .........................................210
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
210
On Board Diagnosis Logic ....................................210
DTC Confirmation Procedure ................................210
Wiring Diagram .....................................................212
Diagnosis Procedure .............................................213
Component Inspection ..........................................215
Removal and Installation .......................................216
DTC P0125 ECT SENSOR ...............................217
Component Description .........................................217
On Board Diagnosis Logic ....................................217
DTC Confirmation Procedure ................................217
Diagnosis Procedure .............................................218
Component Inspection ..........................................218
Removal and Installation .......................................219
DTC P0127 IAT SENSOR ................................220
Component Description .........................................220
On Board Diagnosis Logic ....................................220
DTC Confirmation Procedure ................................220
Diagnosis Procedure .............................................221
Component Inspection ..........................................221
Removal and Installation .......................................222
DTC P0128 THERMOSTAT FUNCTION ..........223
On Board Diagnosis Logic ....................................223
DTC Confirmation Procedure ................................223
Diagnosis Procedure .............................................223
Component Inspection ..........................................223
Removal and Installation .......................................224
DTC P0130, P0150 A/F SENSOR 1 .................225
Component Description .........................................225
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
225
On Board Diagnosis Logic ....................................225
DTC Confirmation Procedure ................................225
Overall Function Check .........................................227
Wiring Diagram .....................................................228
Diagnosis Procedure .............................................231
Removal and Installation .......................................233
DTC P0131, P0151 A/F SENSOR 1 .................234
Component Description .........................................234
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
234
On Board Diagnosis Logic ....................................234
DTC Confirmation Procedure ................................234
Wiring Diagram .....................................................236
Diagnosis Procedure .............................................239
Removal and Installation .......................................241
DTC P0132, P0152 A/F SENSOR 1 ................242
Component Description .........................................242
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
242
On Board Diagnosis Logic .....................................242
DTC Confirmation Procedure ................................242
Wiring Diagram ......................................................244
Diagnosis Procedure .............................................247
Removal and Installation .......................................249
DTC P0133, P0153 A/F SENSOR 1 ................250
Component Description .........................................250
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
250
On Board Diagnosis Logic .....................................250
DTC Confirmation Procedure ................................250
Wiring Diagram ......................................................253
Diagnosis Procedure .............................................256
Removal and Installation .......................................259
DTC P0137, P0157 HO2S2 .............................260
Component Description .........................................260
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
260
On Board Diagnosis Logic .....................................260
DTC Confirmation Procedure ................................260
Overall Function Check .........................................261
Wiring Diagram ......................................................262
Diagnosis Procedure .............................................265
Component Inspection ...........................................267
Removal and Installation .......................................269
DTC P0138, P0158 HO2S2 .............................270
Component Description .........................................270
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
270
On Board Diagnosis Logic .....................................270
DTC Confirmation Procedure ................................271
Overall Function Check .........................................272
Wiring Diagram ......................................................273
Diagnosis Procedure .............................................276
Component Inspection ...........................................280
Removal and Installation .......................................281
DTC P0139, P0159 HO2S2 .............................282
Component Description .........................................282
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
282
On Board Diagnosis Logic .....................................282
DTC Confirmation Procedure ................................282
Overall Function Check .........................................283
Wiring Diagram ......................................................284
Diagnosis Procedure .............................................287
Component Inspection ...........................................289
Removal and Installation .......................................291
DTC P0171, P0174 FUEL INJECTION SYS-
TEM FUNCTION ..............................................
292
On Board Diagnosis Logic .....................................292
DTC Confirmation Procedure ................................292

EC-4
Wiring Diagram ......................................................294
Diagnosis Procedure .............................................297
DTC P0172, P0175 FUEL INJECTION SYS-
TEM FUNCTION ..............................................
301
On Board Diagnosis Logic .....................................301
DTC Confirmation Procedure ................................301
Wiring Diagram ......................................................303
Diagnosis Procedure .............................................306
DTC P0181 FTT SENSOR ...............................310
Component Description .........................................310
On Board Diagnosis Logic .....................................310
DTC Confirmation Procedure ................................310
Wiring Diagram ......................................................311
Diagnosis Procedure .............................................312
Component Inspection ...........................................313
Removal and Installation .......................................313
DTC P0182, P0183 FTT SENSOR ..................314
Component Description .........................................314
On Board Diagnosis Logic .....................................314
DTC Confirmation Procedure ................................314
Wiring Diagram ......................................................315
Diagnosis Procedure .............................................315
Component Inspection ...........................................317
Removal and Installation .......................................317
DTC P0222, P0223 TP SENSOR ....................318
Component Description .........................................318
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
318
On Board Diagnosis Logic .....................................318
DTC Confirmation Procedure ................................318
Wiring Diagram ......................................................320
Diagnosis Procedure .............................................321
Component Inspection ...........................................323
Removal and Installation .......................................324
DTC P0300 - P0308 MULTIPLE CYLINDER
MISFIRE, NO. 1 - 8 CYLINDER MISFIRE .......
325
On Board Diagnosis Logic .....................................325
DTC Confirmation Procedure ................................325
Diagnosis Procedure .............................................326
DTC P0327, P0328, P0332, P0333 KS ...........332
Component Description .........................................332
On Board Diagnosis Logic .....................................332
DTC Confirmation Procedure ................................332
Wiring Diagram ......................................................333
Diagnosis Procedure .............................................334
Component Inspection ...........................................335
Removal and Installation .......................................335
DTC P0335 CKP SENSOR (POS) ...................336
Component Description .........................................336
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
336
On Board Diagnosis Logic .....................................336
DTC Confirmation Procedure ................................336
Wiring Diagram .....................................................338
Diagnosis Procedure .............................................339
Component Inspection ..........................................341
Removal and Installation .......................................341
DTC P0340 CMP SENSOR (PHASE) ..............342
Component Description ........................................342
On Board Diagnosis Logic ....................................342
DTC Confirmation Procedure ................................342
Wiring Diagram .....................................................344
Diagnosis Procedure .............................................345
Component Inspection ..........................................347
Removal and Installation .......................................348
DTC P0420, P0430 THREE WAY CATALYST
FUNCTION ........................................................
349
On Board Diagnosis Logic ....................................349
DTC Confirmation Procedure ................................349
Overall Function Check .........................................350
Diagnosis Procedure .............................................351
DTC P0441 EVAP CONTROL SYSTEM ..........354
System Description ...............................................354
On Board Diagnosis Logic ....................................354
DTC Confirmation Procedure ................................354
Overall Function Check .........................................355
Diagnosis Procedure .............................................356
DTC P0442 EVAP CONTROL SYSTEM ..........359
On Board Diagnosis Logic ....................................359
DTC Confirmation Procedure ................................359
Diagnosis Procedure .............................................360
DTC P0443 EVAP CANISTER PURGE VOL-
UME CONTROL SOLENOID VALVE ...............
366
Description ............................................................366
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
366
On Board Diagnosis Logic ....................................367
DTC Confirmation Procedure ................................367
Wiring Diagram .....................................................368
Diagnosis Procedure .............................................369
Component Inspection ..........................................372
Removal and Installation .......................................372
DTC P0444, P0445 EVAP CANISTER PURGE
VOLUME CONTROL SOLENOID VALVE .......
373
Description ............................................................373
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
373
On Board Diagnosis Logic ....................................374
DTC Confirmation Procedure ................................374
Wiring Diagram .....................................................375
Diagnosis Procedure .............................................376
Component Inspection ..........................................378
Removal and Installation .......................................378
DTC P0447 EVAP CANISTER VENT CON-
TROL VALVE ...................................................
379
Component Description .......................................