INFINITI QX56 2007 Factory Service Manual

EC-98
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
BBIA0384E

TROUBLE DIAGNOSIS
EC-99
< SERVICE INFORMATION >
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PBIB2639E

EC-100
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Vacuum Hose Drawing
INFOID:0000000003531622
Refer to EC-24, "Schematic" for Vacuum Control System.
PBIB2052E

TROUBLE DIAGNOSIS
EC-101
< SERVICE INFORMATION >
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Circuit DiagramINFOID:0000000003531623
BBWA2786E

EC-102
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
AWBWA0157G

TROUBLE DIAGNOSIS
EC-103
< SERVICE INFORMATION >
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ECM Harness Connector Terminal LayoutINFOID:0000000003531624
ECM Terminal and Reference ValueINFOID:0000000003531625
PREPARATION
ECM is located in the engine room passenger side behind battery.
ECM INSPECTION TABLE
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground other than ECM terminals, such as the ground.
PBIB3368E
BBIA0386E
TER-
MI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
1 B ECM ground[Engine is running]
• Idle speedBody ground
2 LG/B A/F sensor 1 heater (bank 1)[Engine is running]
•Warm-up condition
• Idle speed
(More than 140 seconds after starting en-
gine)Approximately 2.9 - 8.8V
3LThrottle control motor relay
power supply[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
4 L/W Throttle control motor (Close)[Ignition switch: ON]
• Engine: Stopped
• Selector lever: D
• Accelerator pedal: Fully released0 - 14V
PBIA8148J
PBIB1104E

EC-104
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
5 L/B Throttle control motor (Open)[Ignition switch: ON]
• Engine: Stopped
• Selector lever: D
• Accelerator pedal: Fully depressed0 - 14V
6GRHeated oxygen sensor 2 heat-
er (bank 1)[Engine is running]
• Engine speed: Below 3,600 rpm after the
following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500
and 4,000 rpm for 1 minute and at idle for 1
minute under no load0 - 1.0V
[Ignition switch: ON]
• Engine: Stopped
[Engine is running]
• Engine speed: Above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
10 WIntake valve timing control so-
lenoid valve (bank 1)[Engine is running]
•Warm-up condition
• Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
•Warm-up condition
• Engine speed: 2,000rpm7 - 12V
11 L GIntake valve timing control so-
lenoid valve (bank 2)[Engine is running]
•Warm-up condition
• Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
•Warm-up condition
• Engine speed: 2,000rpm7 - 12V
12 RPower steering pressure sen-
sor[Engine is running]
• Steering wheel: Being turned0.5 - 4.5V
[Engine is running]
• Steering wheel: Not being turned0.4 - 0.8V TER-
MI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB1105E
PBIB1790E
PBIB1790E

TROUBLE DIAGNOSIS
EC-105
< SERVICE INFORMATION >
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13 OCrankshaft position sensor
(POS)[Engine is running]
•Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idleApproximately 10V
[Engine is running]
• Engine speed: 2,000 rpmApproximately 10V
14 YCamshaft position sensor
(PHASE)[Engine is running]
•Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle1.0 - 4.0V
[Engine is running]
• Engine speed: 2,000 rpm1.0 - 4.0V
15 W Knock sensor (bank 1)[Engine is running]
• Idle speedApproximately 2.5V
16 G/L A/F sensor 1 (bank 1)[Engine is running]
•Warm-up condition
• Engine speed: 2,000 rpmApproximately 1.8V
Output voltage varies with air fuel
ratio. TER-
MI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)PBIB1041E
PBIB1042E
PBIB1039E
PBIB1040E

EC-106
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
21
22
23
44O/L
BR
GR/W
OFuel injector No. 5
Fuel injector No. 3
Fuel injector No. 1
Fuel injector No. 7[Engine is running]
•Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idleBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
•Warm-up condition
• Engine speed: 2,000 rpmBATTERY VOLTAGE
(11 - 14V)
24
43GR/G
GR/GA/F sensor 1 heater (bank 2)[Engine is running]
•Warm-up condition
• Idle speed
(More than 140 seconds after starting en-
gine)Approximately 2.9 - 8.8V
25 O/GHeated oxygen sensor 2 heat-
er (bank 2)[Engine is running]
• Engine speed: Below 3,600 rpm after the
following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500
and 4,000 rpm for 1 minute and at idle for 1
minute under no load0 - 1.0V
[Ignition switch: ON]
• Engine: Stopped
[Engine is running]
• Engine speed: Above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
32 LEVAP control system pres-
sure sensor[Ignition switch: ON]Approximately 1.8 - 4.8V
34 R/B Intake air temperature sensor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with intake
air temperature.
35 BR/R A/F sensor 1 (bank 1)[Engine is running]
•Warm-up condition
• Engine speed: 2,000 rpmApproximately 1.8V
Output voltage varies with air fuel
ratio.
36 W Knock sensor (bank 2)[Engine is running]
• Idle speedApproximately 2.5V TER-
MI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)SEC984C
SEC985C
PBIA8148J

TROUBLE DIAGNOSIS
EC-107
< SERVICE INFORMATION >
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40
41
42
63Y/G
P
L
GFuel injector No. 6
Fuel injector No. 4
Fuel injector No. 2
Fuel injector No. 8[Engine is running]
•Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idleBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
•Warm-up condition
• Engine speed: 2,000 rpmBATTERY VOLTAGE
(11 - 14V)
45 L/YEVAP canister purge volume
control solenoid valve[Engine is running]
• Idle speed
• Accelerator pedal: Not depressed even
slightly, after engine startingBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
• Engine speed: About 2,000 rpm (More than
100 seconds after starting engine)BATTERY VOLTAGE
(11 - 14V)
47 YSensor power supply
(Throttle position sensor)[Ignition switch: ON]Approximately 5V
48 SBSensor power supply
(EVAP control system pres-
sure sensor)[Ignition switch: ON]Approximately 5V
49 R/YSensor power supply
(Refrigerant pressure sensor)[Ignition switch: ON]Approximately 5V
50 B Throttle position sensor 1[Ignition switch: ON]
• Engine: Stopped
• Selector lever: D
• Accelerator pedal: Fully releasedMore than 0.36V
[Ignition switch: ON]
• Engine: Stopped
• Selector lever: D
• Accelerator pedal: Fully depressedLess than 4.75V TER-
MI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)SEC984C
SEC985C
SEC990C
SEC991C