2005 INFINITI QX4 ECU

AT-248
TRANSMISSION ASSEMBLY
Revision: October 20052005 QX56
8. Remove crankshaft position sensor (POS) from A/T assembly.
9. Disconnect A/T fluid cooler tube from A/T assembly.
10. Remove dust cover from converter housing part.
11. Secure drive plate using Tool then remove drive plate to torque
converter bolts.
CAUTION:
When turning crankshaft, turn it clockwise as viewed from
the front of the engine.
NOTE:
Tool must be removed and drive plate turned to access all drive
plate to torque converter bolts.
12. Support A/T assembly with a transmission jack.
CAUTION:
When setting the transmission jack, be careful not to allow it to collide against the drain plug.
13. Remove cross member with power tool.
14. Tilt the transmission slightly to keep the clearance between body and transmission, and then disconnect
air breather hose from A/T fluid indicator pipe. Refer to AT-244, "
REMOVAL" .
15. Disconnect A/T assembly connector and transfer unit connector.
16. Remove A/T fluid indicator pipe.
17. Plug up openings such as the fluid charging pipe hole, etc.
18. Remove A/T assembly to engine bolts with power tool.
19. Remove A/T assembly with transfer from vehicle, using Tool.
CAUTION:

Secure torque converter to prevent it from dropping.

Secure A/T assembly to a transmission jack.
NOTE:
The actual special service tool may differ from tool shown.
20. Remove transfer from A/T assembly. Refer to TF-143,
"REMOVAL" .
INSPECTION
Installation and Inspection of Torque Converter

After inserting a torque converter to a transmission, be sure to
check dimension A to ensure it is within the reference value
limit.
LCIA0334E
Tool number : — (J-47245)
Tool number : — (J-47002)
LCIA0335E
SCIA2203E
Dimension A : 24.0 mm (0.94 in) or more
SAT0 1 7B

TRANSMISSION ASSEMBLY
AT-249
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Revision: October 20052005 QX56
INSTALLATION
Installation of the remaining components is in the reverse order of removal, while paying attention to the fol-
lowing:

When installing transmission to the engine, attach the bolts as shown.
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, using Tool to secure drive plate.
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 MA-22,
"Checking A/T Fluid" , AT-228, "Checking of A/T Position" , AT- 2 2 8 , "Adjustment of A/T Position" . Transmission to engine
bolts: 113 N·m (12 kg-m, 83 ft-lb)
LCIA0371E
Tool number : — (J-47245)
LCIA0335E

DISASSEMBLY
AT-265
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Revision: October 20052005 QX56
14. Loosen lock nut and remove band servo anchor end pin from
transmission case.
15. Remove brake band from transmission case.

To prevent brake linings from cracking or peeling, do not
stretch the flexible band unnecessarily. When removing
the brake band, always secure it with a clip as shown in
the figure at left.
Leave the clip in position after removing the brake band.

Check brake band facing for damage, cracks, wear or
burns.
16. Remove mid carrier assembly and rear carrier assembly as a
unit.
SCIA5016E
SCIA5345E
SAT6 5 5
SCIA5344E

ASSEMBLY
AT-301
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Revision: October 20052005 QX56
15. Install new seal rings to drum support.
CAUTION:

Do not reuse seal rings.

Apply petroleum jelly to seal rings.
16. Install spring retainer and return spring in transmission case.
17. Install snap ring (fixing spring retainer) in transmission case
while compressing return spring, using Tool.
CAUTION:
Securely assemble them using a flat-bladed screwdriver so
that snap ring tension is slightly weak.
SCIA3333E
SCIA2324E
Tool number : KV31102400 (J-34285, J-34285-87)
SCIA5582E

ASSEMBLY
AT-317
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Revision: October 20052005 QX56
g. Install control valve with TCM in transmission case.
CAUTION:

Make sure that turbine revolution sensor securely installs
turbine revolution sensor hole.

Adjust A/T assembly harness connector of control valve
with TCM to terminal hole of transmission case.

Hang down revolution sensor harness toward outside so
as not to disturb installation of control valve with TCM.

Assemble it so that manual valve cutout is engaged with
manual plate projection.
h. Install bolts A, B and C to control valve with TCM.
i. Tighten bolt 1, 2 and 3 temporarily to prevent dislocation. After
that tighten them in order (1 → 2 → 3), and then tighten other
bolts.
j. Tighten control valve with TCM bolts to the specified torque.
Refer to AT- 2 5 0 , "
Components" .
10. Connect A/T fluid temperature sensor 2 connector.
SCIA5034E
SCIA5035E
Bolt symbol Length: mm (in) Number of bolts
A 42 (1.65) 5
B 55 (2.17) 6
C 40 (1.57) 1
SCIA5025E
SCIA5037E
SCIA5023E

AT-318
ASSEMBLY
Revision: October 20052005 QX56
11. Securely fasten terminal cord assembly and A/T fluid tempera-
ture sensor 2 harness with terminal clips.
12. Connect revolution sensor connector.
13. Securely fasten revolution sensor harness with terminal clips.
14. Pull down A/T assembly harness connector.
CAUTION:
Be careful not to damage connector.
15. Install snap ring to A/T assembly harness connector.
SCIA5446E
SCIA5024E
SCIA5293E
SCIA5299E
SCIA5300E

TROUBLE DIAGNOSIS
ATC-33
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Revision: October 20052005 QX56
TROUBLE DIAGNOSISPFP:00004
CONSULT-II Function (HVAC)EJS003XD
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II BASIC OPERATION
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. With the ignition switch OFF, connect CONSULT-II and “CON-
SULT-II CONVERTER” to the data link connector, and turn the
ignition switch ON.
2. Touch “START (NISSAN BASED VHCL)”.
3. Touch “HVAC” on “SELECT SYSTEM” screen. If “HVAC” is not
indicated, go to GI-39, "
CONSULT-II Data Link Connector (DLC)
Circuit" .
Diagnostic mode Description
SELF-DIAG RESULTS Displays front air control self-diagnosis results.
DATA MONITOR Displays front air control input/output data in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
ECU PART NUMBER Front air control part number can be read.
BBIA0369E
BCIA0029E
BCIA0030E

ATC-36
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
CONSULT-II Function (BCM)EJS003XE
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II BASIC OPERATION
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. With the ignition switch OFF, connect CONSULT-II and “CON-
SULT-II CONVERTER” to the data link connector, and turn the
ignition switch ON.
2. Touch “START (NISSAN BASED VHCL)”.
3. Touch “BCM” on “SELECT SYSTEM” screen. If “BCM” is not
indicated, go to GI-39, "
CONSULT-II Data Link Connector (DLC)
Circuit" .
BCM diagnostic
test itemDiagnostic mode Description
Inspection by partWORK SUPPORTSupports inspections and adjustments. Commands are transmitted to the BCM
for setting the status suitable for required operation, input/output signals are
received from the BCM and received data is displayed.
DATA MONITOR Displays BCM input/output data in real time.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
ECU PART NUMBER BCM part number can be read.
CONFIGURATION Performs BCM configuration read/write functions.
BBIA0369E
BCIA0029E
BCIA0030E