check engine INFINITI QX56 2010 Factory Service Manual

TM-162
< ON-VEHICLE MAINTENANCE >
ROAD TEST
With CONSULT-III
Read the gear position and engine speed.
When the A/T shift-down D5
→ D4, does the engine speed drop smoothly back to idle?
YES >> 1. Stop the vehicle. 2. Go to TM-162, "
Cruise Test - Part 2".
NO >> Record the malfunction and go to TM-162, "
Cruise Test - Part 2".
Cruise Test - Part 2INFOID:0000000005148732
1.CHECK STARTING FROM D1
1. Move selector lever the “D” position.
2. Accelerate at half throttle. With CONSULT-III
Read the gear position.
Does it start from D1?
YES >> GO TO 2.
NO >> Record the malfunction, GO TO 2.
2.CHECK SHIFT-UP D1 → D2
Press the accelerator pedal down all the way and ins pect whether or not the transmission shifts up (D1 → D2)
at the correct speed.
• Refer to TM-265, "
Vehicle Speed at Which Gear Shifting Occurs".
With CONSULT-III
Read the gear position, throttle position and vehicle speed.
Does the A/T shift-up D1
→ D2 at the correct speed?
YES >> GO TO 3.
NO >> Record the malfunction, GO TO 3.
3.CHECK SHIFT-UP D2 → D3
Press the accelerator pedal down all the way and ins pect whether or not the transmission shifts up (D2 → D3)
at the correct speed.
• Refer to TM-265, "
Vehicle Speed at Which Gear Shifting Occurs".
With CONSULT-III
Read the gear position, throttle position and vehicle speed.
Does the A/T shift-up D2
→ D3 at the correct speed?
YES >> GO TO 4.
NO >> Record the malfunction, GO TO 4.
4.CHECK SHIFT-UP D3 → D4 AND ENGINE BRAKE
When the transmission changes speed D3 → D4, return the accelerator pedal.
Does the A/T shift-up D3
→ D4 and apply the engine brake?
YES >> 1. Stop the vehicle. 2. Go to TM-162, "
Cruise Test - Part 3".
NO >> Record the malufunction and go to TM-162, "
Cruise Test - Part 3".
Cruise Test - Part 3INFOID:0000000005148733
1.CHECK SHIFT-DOWN
During D
5 driving, move gear selector from D → 4 → 3 → 2 → 1.
With CONSULT-III
Read the gear position.
Is downshifting correctly performed?
YES >> GO TO 2.
NO >> Record the malfunction, GO TO 2.
2.CHECK ENGINE BRAKE
Revision: April 20092010 QX56

ROAD TESTTM-163
< ON-VEHICLE MAINTENANCE >
CEF
G H
I
J
K L
M A
B
TM
N
O P
Check engine brake.
Does engine braking effectively reduce speed in 1
1 position?
YES >> Check malfunction phenomena to repair or replace malfunctioning part. Refer to TM-121, "Symp-
tom Table".
NO >> 1. Record the malfunction. 2. Check malfunction phenomena to repair or replace malfunctioning part. Refer to TM-121,
"Symptom Table".
Vehicle Speed When Shifting GearsINFOID:0000000005148734
Refer to TM-265, "Vehicle Speed at Which Gear Shifting Occurs".
Vehicle Speed When Performing and Releasing Complete Lock-upINFOID:0000000005148735
Refer to TM-266, "Vehicle Speed at Which Lock-up Occurs/Releases".
Revision: April 20092010 QX56

TM-164
< ON-VEHICLE MAINTENANCE >
A/T POSITION
A/T POSITION
Adjustment of A/T PositionINFOID:0000000005148736
1. Loosen nut of control cable.
2. Place the manual lever and selector lever in “P” position.
3. Push the control cable in the direction shown with a force of 9.8
N (1kg, 2.2 lb), and release it. This is in the natural state, tighten
control cable nut to specifications.
Checking of A/T PositionINFOID:0000000005148737
With the selector lever in the “P” position, turn t he ignition switch to the ON position with the engine OFF.
Confirm that the following conditions apply.
• The selector lever can be shifted from the “P” position only when the brake pedal is depressed.
• The selector lever stops at each position with the f eel of engagement when it is moved through all the posi-
tions.
• There is no excessive effort, sticking, noise or rattle.
• The actual position of the selector lever matches the position shown by the shift position indicator and the A/
T body.
• The back-up lamps illuminate only when the selector lever is placed in the “R” position.
• The back-up lamps do not illuminate when the selector lever is pushed against the “R” position when in the “P” or “N” position.
• The engine can only be started with the select or lever in the “P” and “N” positions.
• The A/T is locked completely when in the “P” position. Control cable nut : 14.5 N·m (1.5 kg-m, 11 ft-lb)
SCIA6532E
Revision: April 20092010 QX56

TRANSMISSION ASSEMBLYTM-187
< REMOVAL AND INSTALLATION >
CEF
G H
I
J
K L
M A
B
TM
N
O P
8. Remove crankshaft position sens or (POS) from A/T assembly.
CAUTION:
• Do not subject it to impact by dropping or hitting it.
• Do not disassemble.
• Do not allow metal filings or foreign material to get on the
sensor front edge magnetic area.
• Do not place in an area affected by magnetism.
9. Remove fluid cooler tube.
10. Remove dust cover from converter housing.
11. Turn crankshaft to access and remove the four bolts for drive plate and torque converter.
CAUTION:
When turning crankshaft, turn it clockwise as viewed from
the front of the engine.
12. Support A/T assembly with a transmission jack. CAUTION:
When setting the transmission jack, be careful not to allow
it to collide agai nst the drain plug.
13. Remove cross member using power tool.
14. Remove air breather hose. Refer to TM-166, "
Removal and
Installation".
15. Disconnect A/T assembly connector.
16. Remove A/T fluid charging pipe from A/T assembly.
17. Plug any openings such as the A/T fluid charging pipe hole.
18. Remove the A/T assembly to engine bolts using power tool.
19. Remove A/T assembly from vehicle using transmission jack. CAUTION:
• Secure torque converter to prevent it from dropping.
• Secure A/T assembly to a transmission jack.
INSPECTION
Installation and Inspection of Torque Converter
• After inserting a torque converter to a transmission, be sure to check distance A to ensure it is within specifications.
INSTALLATION
Installation of the remaining components is in the revers e order of the removal, while paying attention to the
following:
LCIA0334E
LCIA0335E
SCIA0499E
Distance A : 24.0 mm (0.94 in) or more
SAT017B
Revision: April 20092010 QX56

TM-188
< REMOVAL AND INSTALLATION >
TRANSMISSION ASSEMBLY
• When installing transmission to the engine, attach the bolts in the order as shown.CAUTION:
• When replacing an engine or transmission you must make
sure the dowels are installe d correctly during re-assembly.
• Improper alignment caused by missing dowels may cause
vibration, oil leaks or breakage of drivetrain components.
NOTE:
*: No.2 bolt also secures air breather vent.
• Align the positions of bolts for drive plate with those of the torque converter, and temporarily tighten the bolts. Then tighten the bolts
with the specified torque. Refer to TM-186, "
Removal and Installa-
tion (2WD)".
CAUTION:
• When turning crankshaft, turn it clockwise as viewed from the front of the engine.
• After converter is installed to drive plate, rotate crankshaft
several turns and check to be sure that transmission rotates
freely without binding.
• Install crankshaft pos ition sensor (POS).
• After completing installation check fluid leakage, fluid level and the
positions of A/T. Refer to TM-148, "
Checking the A/T Fluid (ATF)", TM-164, "Checking of A/T Position" and
TM-164, "
Adjustment of A/T Position".
Removal and Installation (4WD)INFOID:0000000005148744
COMPONENTS
Transmission to engine
bolts : 113 N·m (12 kg-m, 83 ft-lb)
LCIA0371E
LCIA0335E
Revision: April 20092010 QX56

TRANSMISSION ASSEMBLYTM-191
< REMOVAL AND INSTALLATION >
CEF
G H
I
J
K L
M A
B
TM
N
O P
• After inserting a torque converter to a transmission, be sure to check distance A to ensure it is within specifications.
INSTALLATION
Installation of the remaining components is in the revers e order of removal, while paying attention to the fol-
lowing:
• When installing transmission to the engine, attach the bolts as shown.
CAUTION:
• When replacing an engine or transmission you must make sure the dowels are installed correctly during re-assembly.
• Improper alignment caused by missing dowels may cause
vibration, oil leaks or breakage of drivetrain components.
NOTE:
*: No.2 bolt also secures air breather vent.
• Align the positions of bolts for dr ive plate with those of the torque
converter, and temporarily tighten the bolts. Then tighten the bolts
with the specified torque. Refer to TM-188, "
Removal and Installa-
tion (4WD)".
CAUTION:
• When turning crankshaft, turn it clockwise as viewed from the
front of the engine.
• After converter is installed to drive plate, rotate crankshaft
several turns and check to be sure that transmission rotates
freely without binding.
• Install crankshaft position sensor (POS).
• After completing installation, check fluid leakage, fluid level, and
the positions of A/T. Refer to TM-148, "
Checking the A/T Fluid (ATF)", TM-164, "Checking of A/T Position"
and TM-164, "Adjustment of A/T Position".
Distance A : 24.0 mm (0.94 in) or more
SAT017B
Transmission to engine bolts : 113 N·m (12 kg-m,
83 ft-lb)
LCIA0371E
LCIA0335E
Revision: April 20092010 QX56

VTL-18
< ON-VEHICLE REPAIR >
HEATER & COOLING UNIT ASSEMBLY
1. Move the two front seats to the rear most position on the seat track.
2. Disconnect the battery negative terminal and battery positive terminal.
3. Discharge the refrigerant from the A/C system. Refer to HA-20, "
HFC-134a (R-134a) Service Procedure".
4. Drain the coolant from the engine cooling system. Refer to CO-11, "
Changing Engine Coolant".
5. Disconnect the front heater hoses from the front heater core.
6. Disconnect the high/low pressure pipes from the front expansion valve.
7. Remove the instrument panel and console panel. Refer to IP-12, "
Removal and Installation".
8. Disconnect the instrument panel wire harness at the RH and LH in-line connector brackets, and the fuse block (J/B) electrical connectors. Refer to PG-9, "
Wiring Diagram — Battery Power Supply —".
9. Disconnect the steering member from each side of the vehicle body.
10. Remove the front heater and cooling unit assembly with it attached to the steering member, from the vehi-
cle.
CAUTION:
Use care not to damage the seats and interior tr im panels when removing the front heater and
cooling unit assembly with it at tached to the steering member.
11. Remove the front heater and cooling unit assembly from the steering member.
Installation
Installation is in the reverse order of removal.
CAUTION:
• Replace the O-ring of the low-pressure pipe and high-pressure pipe with a new one, and apply com-
pressor oil to it when installing it.
• After charging the refrigerant, check for leaks.
NOTE:
• Fill the engine cooling system with the specified coolant mixture. Refer to CO-11, "
Changing Engine Cool-
ant".
• Recharge the A/C system. Refer to HA-20, "
HFC-134a (R-134a) Service Procedure".
REAR HEATER AND COOLING UNIT ASSEMBLY
Removal
1. Discharge the refrigerant from the A/C system. Refer to HA-20, "HFC-134a (R-134a) Service Procedure".
2. Drain the coolant from the engine cooling system. Refer to CO-11, "
Changing Engine Coolant".
3. Remove the luggage side finisher lower and upper RH. Refer to INT-19, "
Removal and Installation".
4. Disconnect the rear heater core hoses from the rear heater core.
5. Disconnect the rear A/C pipes from the rear expansion valve.
6. Disconnect the following electrical connectors: • Rear blower motor
• Rear variable blower control
• Rear air mix door motor
• Rear mode door motor
7. Disconnect the ducts and drain tube from the rear heater and cooling unit assembly.
8. Remove the rear heater and cooling unit assembly.
Installation
Installation is in the reverse order of removal.
CAUTION:
• Replace the O-ring of the low-pressure pipe and high-pressure pipe with a new one, and apply com-
pressor oil to it when installing it.
• After charging the refrigerant, check for leaks.
NOTE:
• Fill the engine cooling system with the specified coolant mixture. Refer to CO-11, "
Changing Engine Cool-
ant".
• Recharge the A/C system. Refer to HA-20, "
HFC-134a (R-134a) Service Procedure".
Revision: April 20092010 QX56

WCS-12
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (METER)
DIAGNOSIS SYSTEM (METER)
CONSULT-III Function (METER/M&A)INFOID:0000000005382270
CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.
SELF-DIAG RESULTS
Display Item List
Refer to WCS-48, "DTC Index".
DATA MONITOR
Display Item List
X: Applicable
METER/M&A diagnosis mode Description
SELF-DIAG RESULTS Displays combination meter self-diagnosis results. DATA MONITOR Displays combination meter input/output data in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
Display item [Unit] MAIN
SIGNALS SELECTION
FROM MENU Description
SPEED METER [km/h] or [mph] X X Displays the value of vehicle speed signal.
SPEED OUTPUT [km/h] or [mph] X XDisplays the value of vehicle speed signal, which is transmitted to
each unit with
CAN communication.
TACHO METER [rpm] XX Displays the value of engine speed signal, which is input from ECM.
FUEL METER [lit.] XXDisplays the value, which processes a resistance signal from fuel
gauge.
W TEMP METER [ °C] or [° F] X XDisplays the value of engine coolant temperature signal, which is in-
put from ECM.
ABS W/L [ON/OFF] X Displays [ON/OFF] condition of ABS warning lamp.
VDC/TCS IND [ON/OFF] X Displays [ON/OFF] condition of VDC OFF indicator lamp.
SLIP IND [ON/OFF] X Displays [ON/OFF] condition of SLIP indicator lamp.
BRAKE W/L [ON/OFF] X Displays [ON/OFF] condition of brake warning lamp.*
DOOR W/L [ON/OFF] X Displays [ON/OFF] condition of door warning lamp.
TRUNK W/L [ON/OFF] X Displays [ON/OFF] condition of glass hatch warning lamp.
HI-BEAM IND [ON/OFF] X Displays [ON/OFF] condition of high beam indicator.
TURN IND [ON/OFF] X Displays [ON/OFF] conditio n of turn indicator.
OIL W/L [ON/OFF] X Displays [ON/OFF] condition of oil pressure warning lamp.
C-ENG W/L [ON/OFF] X Displays [ON/OFF] condition of malfunction indicator lamp.
CRUISE IND [ON/OFF] X Displays [ON/OFF] condition of CRUISE indicator.
SET IND [ON/OFF] X Displays [ON/OFF] condition of SET indicator.
AT CHECK W/L [ON/OFF] X Displays [ON/OFF] condition of AT CHECK warning lamp.
FUEL W/L [ON/OFF] XX Displays [ON/OFF] condition of low-fuel warning lamp.
AIR PRES W/L [ON/OFF] X Displays [ON/OFF] condition of tire pressure warning lamp.
KEY G/Y W/L [ON/OFF] X Displays [ON/OFF] condition of key green warning lamp.
KEY R W/L [ON/OFF] X Displays [ON/OFF] condition of key red warning lamp.
KEY KNOB W/L [ON/OFF] X Displays [ON/OFF] condition of key knob warning lamp.
M RANGE SW [ON/OFF] XX Displays [ON/OFF] condition of manual mode range switch.
NM RANGE SW [ON/OFF] XXDisplays [ON/OFF] condition of except for manual mode range
switch.
AT SFT UP SW [ON/OFF] XX Displays [ON/OFF] condition of A/T shift-up switch.
Revision: April 20092010 QX56

WCS-48
< ECU DIAGNOSIS >
COMBINATION METER
DTC Index
INFOID:0000000005382411
NOTE:
Function Specifications
Speedometer
Zero indication.
Tachometer
Fuel gauge
Engine coolant temperature gauge
Engine oil pressure gauge
Voltage gauge
Illumination control
Meter illumination Change to nighttime mode when communication is lost.
Segment LCD Odometer
Freeze current indication.
A/T position Display turns off.
Buzzer Buzzer turns off.
Warning lamp/indicator lamp ABS warning lamp
Lamp turns on when communication is lost.
Brake warning lamp
VDC OFF indicator lamp
SLIP indicator lamp
A/T CHECK warning lamp
Lamp turns off when communication is lost.
Oil pressure/coolant temperature
warning lamp
Light indicator
Malfunction indicator lamp
Master warning lamp
Air bag warning lamp
High beam indicator
Turn signal indicator lamp
CRUISE indicator lamp
Driver and passenger seat belt warn-
ing lamp
Lamp turns off when disconnected.
Charge warning lamp
Security indicator lamp
4WD indicator lamp
AT P i n d i c a t o r l a m p
CK SUSP warning lamp
Low tire pressure warning lamp
Lamp will flash every second for 1 minute and then stay on con-
tinuously thereafter.
CONSULT-III display
MalfunctionReference
page
CAN COMM CIRC
[U1000] Malfunction is detected in CAN communication.
CAUTION:
Even when there is no malfunction on CAN communication system, malfunction may be
misinterpreted when battery has low voltage (when maintaining 7 - 8 V for about 2 sec-
onds) or 10A fuse [No. 3, located in
the fuse block (J/B)] is disconnected. MWI-26
VEHICLE SPEED
CIRC
[B2205]Malfunction is detected when an erroneous speed signal is input.
CAUTION:
Even when there is no malfunction on speed signal system, malfunction may be misin-
terpreted when battery has lo
w voltage (when maintaining 7 - 8 V for about 2 seconds). MWI-27
Revision: April 20092010 QX56

WCS-64
< ECU DIAGNOSIS >
BCM (BODY CONTROL MODULE)
DTC Inspection Priority Chart
INFOID:0000000005382428
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
DTC IndexINFOID:0000000005382429
NOTE: Details of time display
• CRNT: Displays when there is a malfunction now or after returning to the normal condition until turning igni- tion switch OFF → ON again.
• 1 - 39: Displayed if any previous malfunction is present when current condition is normal. It increases like 1
→ 2 → 3...38 → 39 after returning to the normal condition whenever ignition switch OFF → ON. The counter
remains at 39 even if the number of cycles exceeds it. It is counted from 1 again when turning ignition switch
OFF → ON after returning to the normal condition if the malfunction is detected again.
Display contents of CONS ULTFail-safe Cancellation
U1000: CAN COMM CIRCUIT I nhibit engine crankingWhen the BCM re-establishes communication with the other mod-
ules.
Priority
DTC
1 • U1000: CAN COMM CIRCUIT
2 • B2190: NATS ANTENNA AMP
• B2191: DIFFERENCE OF KEY
• B2192: ID DISCORD BCM-ECM
• B2193: CHAIN OF BCM-ECM
• B2013: STRG COMM 1
• B2552: INTELLIGENT KEY
• B2590: NATS MALFUNCTION
3 • C1729: VHCL SPEED SIG ERR
• C1735: IGNITION SIGNAL
4 • C1708: [NO DATA] FL
• C1709: [NO DATA] FR
• C1710: [NO DATA] RR
• C1711: [NO DATA] RL
• C1712: [CHECKSUM ERR] FL
• C1713: [CHECKSUM ERR] FR
• C1714: [CHECKSUM ERR] RR
• C1715: [CHECKSUM ERR] RL
• C1716: [PRESSDATA ERR] FL
• C1717: [PRESSDATA ERR] FR
• C1718: [PRESSDATA ERR] RR
• C1719: [PRESSDATA ERR] RL
• C1720: [CODE ERR] FL
• C1721: [CODE ERR] FR
• C1722: [CODE ERR] RR
• C1723: [CODE ERR] RL
• C1724: [BATT VOLT LOW] FL
• C1725: [BATT VOLT LOW] FR
• C1726: [BATT VOLT LOW] RR
• C1727: [BATT VOLT LOW] RL
CONSULT display
Fail-safeIntelligent Key
warning lamp ON Tire pressure
monitor warning lamp ON Reference page
No DTC is detected.
further testing
may be required. ————
U1000: CAN COMM CIRCUIT ———BCS-32
B2190: NATS ANTENNA AMP ———SEC-31
Revision: April 20092010 QX56