2007 INFINITI QX56 battery

TROUBLE DIAGNOSIS
EC-93
< SERVICE INFORMATION >
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1 - 6: The numbers refer to the order of inspection.Exhaust Exhaust manifold/Tube/Muffler/
Gasket
55555 55 5EM-21
, EX-
3Three way catalyst
Lubrica-
tionOil pan/Oil strainer/Oil pump/Oil
filter/Oil gallery/Oil cooler
55555 55 5EM-24
, LU-
14 , LU-11 ,
LU-12
Oil level (Low)/Filthy oilLU-8
Cooling Radiator/Hose/Radiator filler cap
55555 55 45CO-13
Thermostat 5CO-20
Water pumpCO-18
Water galleryCO-8
Cooling fan 5CO-16
Coolant level (Low)/Contaminat-
ed coolant5CO-9
IVIS (INFINITI Vehicle Immobilizer System —
NATS)11BL-116
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA

EC-94
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Engine Control Component Parts Location
INFOID:0000000003531621
1. ECM 2. Battery current sensor 3. Power steering pressure sensor
4. Ignition coil (with power transistor)
and spark plug (bank 2)5. Refrigerant pressure sensor 6. Intake valve timing control position
sensor (bank 2)
7. Intake valve timing control solenoid
valve (bank 2)8. Engine coolant temperature sensor 9. Electric throttle control actuator
10. Intake valve timing control position
sensor (bank 1)11. Intake valve timing control solenoid
valve (bank 1)12. Cooling fan motor
13. Camshaft position sensor (PHASE) 14. Ignition coil (with power transistor)
and spark plug (bank 1)15. Mass air flow sensor (with intake air
temperature sensor)
16. A/F sensor 1 (bank 1) 17. EVAP service port 18. Fuel injector (bank 1)
19. Knock sensor (bank 1) 20. EVAP canister purge volume control
solenoid valve21. Knock sensor (bank 2)
22. Fuel injector (bank 2) 23. A/F sensor 1 (bank 2) 24. IPDM E/R
BBIA0743E

TROUBLE DIAGNOSIS
EC-95
< SERVICE INFORMATION >
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1. Body ground (view with battery re-
moved)2. Body ground (view with battery re-
moved)3. Body ground
4. No. 1 ignition coil 5. Engine ground 6. Mass air flow sensor (with intake air
temperature sensor)
7. IPDM E/R 8. Battery 9. Radiator hose
10. Camshaft position sensor (PHASE) 11. Electric throttle control actuator
(view with intake air duct removed)12. Cooling fan motor harness connec-
tor
BBIA0778E

TROUBLE DIAGNOSIS
EC-97
< SERVICE INFORMATION >
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13. Intake valve timing control position
sensor (bank 1) (view with engine
cover and intake air duct removed)14. Intake valve timing control solenoid
valve (bank 2) (view with engine cov-
er and intake air duct removed)15. Drive belt (view with engine cover
and intake air duct removed)
16. Radiator hose (view with engine cov-
er and intake air duct removed)17. Intake valve timing control solenoid
valve (bank 1) (view with engine cov-
er and intake air duct removed)
1. Knock sensor (bank 1) (view with en-
gine removed)2. Knock sensor (bank 2) (view with en-
gine removed)3. Battery current sensor
4. Power steering pressure sensor 5. Power steering fluid reservoir 6. Intake manifold
7. Engine coolant temperature sensor 8. Ignition coils (with power transistor) 9. Ignition coil (with power transistor)
10. Injector harness connectors (bank 2) 11. Injector harness connectors (bank 1)
BBIA0774E

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

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
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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