transmission INFINITI QX4 2005 Factory Service Manual

-1QUICK REFERENCE INDEX AGENERAL INFORMATIONGIGeneral InformationBENGINEEMEngine MechanicalLUEngine Lubrication SystemCOEngine Cooling SystemECEngine Control SystemFLFuel SystemEXExhaust SystemACCAccelerator Control SystemCTRANSMISSION/
TRANSAXLEATAutomatic TransmissionDDRIVELINE/AXLETFTransferPRPropeller ShaftFFDFront Final DriveRFDRear Final DriveFAXFront AxleRAXRear AxleESUSPENSIONFSUFront SuspensionRSURear SuspensionWTRoad Wheels & TiresFBRAKESBRBrake SystemPBParking Brake SystemBRCBrake Control SystemGSTEERINGPSPower Steering SystemHRESTRAINTSSBSeat BeltsSRSSupplemental Restraint System (SRS)IBODYBLBody, Lock & Security SystemGWGlasses, Window System & MirrorsRFRoofEIExterior & InteriorIPInstrument PanelSESeatAPAdjustable PedalJAIR CONDITIONERATCAutomatic Air ConditionerKELECTRICALSCStarting & Charging SystemLTLighting SystemDIDriver Information SystemWWWiper, Washer & HornBCSBody Control SystemLANLAN SystemAVAudio Visual, Navigation & Telephone SystemACSAuto Cruise Control SystemPGPower Supply, Ground & Circuit ElementsLMAINTENANCEMAMaintenanceMINDEXIDXAlphabetical IndexEdition: October 2004
Revision: October 2005BDACEFGHIJKLM

2005
QUICK REFERENCE CHART: QX56

Disc Brake - Repair LimitsELS001U8
Unit: mm (in)
Brake PedalELS001U9
Unit: mm (in)
Refill CapacitiesELS001UA
Brake model CLZ31VC (Front) AD14VE (Rear)
Brake PadStandard thickness (new) 11.88 (0.468) 12.13 (0.478)
Repair limit thickness 1.0 (0.039) 1.0 (0.039)
Disc rotorStandard thickness (new) 26.0 (1.024) 14.0 (0.551)
Repair limit thickness 24.5 (0.965) 12.0 (0.472)
Maximum uneven wear (measured at 8 positions) 0.015 (0.0006) 0.015 (0.0006)
Runout limit (with it attached to the vehicle) 0.04 (0.0016) 0.05 (0.0020)
Brake pedal height (from dash panel top surface) 182.3 − 192.3 (7.18 − 7.57)
Depressed pedal height [under a force of 490 N (50 kg, 110 lb) with engine running] More than 90.3 (3.55)
Clearance between stopper rubber and the threaded end of stop lamp switch 0.74 − 1.96 (0.029 − 0.077)
Pedal play3 − 11 (0.12 − 0.43)
DescriptionCapacity (Approximate)
Metric US measure Imp measure
Fuel
105.8 28 US gal 23 1/4 Imp gal
Engine oil
Drain and refillWith oil filter change
6.2 6 1/2 qt 5 1/2 qt
Without oil filter change
5.9 6 1/4 qt 5 1/4 qt
Dry engine (engine overhaul)
7.6 8 qt 6 3/4 qt
Cooling system With reservoir at MAX level
14.4 3 3/4 gal 3 1/8 gal
Automatic transmission fluid (ATF)
10.6 11 1/4 qt 9 3/8 qt
Rear final drive oil
1.75 3 3/4 pt 3 1/8 pt
Transfer fluid
3.0 3 1/8 qt 2 5/8 qt
Front final drive oil
1.6 3 3/8 pt 2 7/8 pt
Power steering fluid (PSF)
1.0 2 1/8 pt 1 3/4 pt
Windshield washer fluid
4.5 1 1/4 gal 1 gal
Air conditioning system refrigerant 1.08 ± 0.05 kg 2.38 ± 0.11 lb 2.38 ± 0.11 lb
Air conditioning system lubricants
290 m9.8 fl oz 10.2 fl oz

ACS-12
[ICC]
LASER BEAM AIMING ADJUSTMENT
Revision: October 20052005 QX56
LASER BEAM AIMING ADJUSTMENTPFP:00026
Outline of Laser Beam Aiming Adjustment ProcedureEKS00BLN
CAUTION:

The laser beam aiming adjustment cannot be performed without CONSULT-II.

The laser beam aiming adjustment must be performed every time the ICC sensor is removed,
installed or has been moved as a result of a collision.
1. Prepare the vehicle and the work area.
2. Set up the ICC target board.
3. Adjust the sensor following the procedure on CONSULT-II.
4. Check system operation after the adjustment.
PreparationEKS00BLO

Place the vehicle on level ground. Shift the transmission into "P" position and release the parking brake.

Adjust the tire pressure to the specified value.

See that there is no load in the vehicle. Coolant, engine oil and fuel should be filled to correct level.

Check that the vehicle suspension has been adjusted to the standard height by the load leveling rear air
suspension system. Refer to RSU-12, "
Basic Inspection" .

Clean the sensor with a soft cloth.
Setting up the ICC Target BoardEKS00BLP
CAUTION:
Accuracy in setting up the ICC target board is essential for the laser beam aiming adjustment.
ADJUSTING HEIGHT OF THE TARGET
1. Attach a triangle scale as shown.Tool number : KV99110100 (J-45718)
LKIA0632E
WKIA1849E

AT-1
AUTOMATIC TRANSMISSION
C TRANSMISSION/TRANSAXLE
CONTENTS
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SECTION AT
A
B
AT
Revision: October 20052005 QX56 INDEX FOR DTC ........................................................ 5
Alphabetical Index .................................................... 5
DTC No. Index ......................................................... 6
PRECAUTIONS .......................................................... 7
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 7
Precautions for On Board Diagnostic (OBD) System
of A/T and Engine .................................................... 7
Precautions .............................................................. 8
Service Notice or Precautions .................................. 9
Wiring Diagrams and Trouble Diagnosis .................. 9
PREPARATION ......................................................... 10
Special Service Tools ............................................. 10
Commercial Service Tools ...................................... 12
A/T FLUID ................................................................. 13
Changing A/T Fluid ................................................ 13
Checking A/T Fluid ................................................. 13
A/T Fluid Cooler Cleaning ...................................... 13
A/T CONTROL SYSTEM .......................................... 16
Cross-Sectional View (2WD models) ..................... 16
Cross-Sectional View (4WD models) ..................... 17
Shift Mechanism ..................................................... 18
TCM Function ......................................................... 29
CAN Communication .............................................. 30
Input/Output Signal of TCM .................................... 30
Line Pressure Control ............................................ 31
Shift Control ........................................................... 32
Lock-up Control ...................................................... 33
Engine Brake Control ............................................. 35
Control Valve .......................................................... 35
ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 37
Introduction ............................................................ 37
OBD-II Function for A/T System ............................. 37
One or Two Trip Detection Logic of OBD-II ............ 37
OBD-II Diagnostic Trouble Code (DTC) ................. 37
Malfunction Indicator Lamp (MIL) ........................... 40
TROUBLE DIAGNOSIS ............................................ 41
DTC Inspection Priority Chart ................................ 41
Fail-Safe ................................................................. 41How To Perform Trouble Diagnosis For Quick and
Accurate Repair ...................................................... 43
A/T Electrical Parts Location .................................. 48
Circuit Diagram ....................................................... 49
Inspections Before Trouble Diagnosis .................... 50
Check Before Engine is Started .............................. 54
Check at Idle ........................................................... 54
Cruise Test - Part 1 ................................................. 55
Cruise Test - Part 2 ................................................. 57
Cruise Test - Part 3 ................................................. 58
Vehicle Speed When Shifting Gears ...................... 59
Vehicle Speed When Performing and Releasing
Complete Lock-up .................................................. 59
Vehicle Speed When Performing and Releasing
Slip Lock-up ............................................................ 59
Symptom Chart ....................................................... 60
TCM Input/Output Signal Reference Values ........... 82
CONSULT-II Function (A/T) .................................... 83
DTC U1000 CAN COMMUNICATION LINE .............. 95
Description .............................................................. 95
On Board Diagnosis Logic ...................................... 95
Possible Cause ....................................................... 95
DTC Confirmation Procedure ................................. 95
Wiring Diagram — AT — CAN ................................ 96
Diagnostic Procedure ............................................. 98
DTC P0615 START SIGNAL CIRCUIT ..................... 99
Description .............................................................. 99
CONSULT-II Reference Value ................................ 99
On Board Diagnosis Logic ...................................... 99
Possible Cause ....................................................... 99
DTC Confirmation Procedure ................................. 99
Wiring Diagram — AT — STSIG ..........................100
Diagnostic Procedure ...........................................101
DTC P0700 TCM .....................................................103
Description ............................................................103
On Board Diagnosis Logic ....................................103
Possible Cause .....................................................103
DTC Confirmation Procedure ...............................103
Diagnostic Procedure ...........................................103
DTC P0705 PARK/NEUTRAL POSITION SWITCH .104

AT-2Revision: October 20052005 QX56 Description ............................................................104
CONSULT-II Reference Value ..............................104
On Board Diagnosis Logic ....................................104
Possible Cause .....................................................104
DTC Confirmation Procedure ...............................104
Wiring Diagram — AT — PNP/SW .......................105
Diagnostic Procedure ...........................................106
DTC P0720 VEHICLE SPEED SENSOR A/T (REV-
OLUTION SENSOR) ...............................................108
Description ............................................................108
CONSULT-II Reference Value ..............................108
On Board Diagnosis Logic ....................................108
Possible Cause .....................................................108
DTC Confirmation Procedure ...............................108
Wiring Diagram — AT — VSSA/T .........................110
Diagnostic Procedure ........................................... . 111
DTC P0725 ENGINE SPEED SIGNAL ...................113
Description ............................................................113
CONSULT-II Reference Value ..............................113
On Board Diagnosis Logic ....................................113
Possible Cause .....................................................113
DTC Confirmation Procedure ...............................113
Diagnostic Procedure ...........................................113
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE .................................................115
Description ............................................................115
CONSULT-II Reference Value ..............................115
On Board Diagnosis Logic ....................................115
Possible Cause .....................................................115
DTC Confirmation Procedure ...............................115
Diagnostic Procedure ...........................................116
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP) .117
Description ............................................................117
CONSULT-II Reference Value ..............................117
On Board Diagnosis Logic ....................................117
Possible Cause .....................................................117
DTC Confirmation Procedure ...............................117
Diagnostic Procedure ...........................................118
DTC P0745 LINE PRESSURE SOLENOID VALVE .119
Description ............................................................119
CONSULT-II Reference Value ..............................119
On Board Diagnosis Logic ....................................119
Possible Cause .....................................................119
DTC Confirmation Procedure ...............................119
Diagnostic Procedure ...........................................120
DTC P1702 TRANSMISSION CONTROL MODULE
(RAM) ......................................................................121
Description ............................................................121
On Board Diagnosis Logic ....................................121
Possible Cause .....................................................121
DTC Confirmation Procedure ...............................121
Diagnostic Procedure ...........................................121
DTC P1703 TRANSMISSION CONTROL MODULE
(ROM) ......................................................................122
Description ............................................................122
On Board Diagnosis Logic ....................................122
Possible Cause .....................................................122
DTC Confirmation Procedure ...............................122
Diagnostic Procedure ...........................................122DTC P1705 THROTTLE POSITION SENSOR ........ 123
Description ............................................................ 123
CONSULT-II Reference Value ............................... 123
On Board Diagnosis Logic .................................... 123
Possible Cause ..................................................... 123
DTC Confirmation Procedure ................................ 123
Diagnostic Procedure ............................................ 123
DTC P1710 A/T FLUID TEMPERATURE SENSOR
CIRCUIT .................................................................. 126
Description ............................................................ 126
CONSULT-II Reference Value ............................... 126
On Board Diagnosis Logic .................................... 126
Possible Cause ..................................................... 126
DTC Confirmation Procedure ................................ 126
Wiring Diagram — AT — FTS ............................... 127
Diagnostic Procedure ............................................ 128
Component Inspection .......................................... 129
DTC P1716 TURBINE REVOLUTION SENSOR .... 131
Description ............................................................ 131
CONSULT-II Reference Value ............................... 131
On Board Diagnosis Logic .................................... 131
Possible Cause ..................................................... 131
DTC Confirmation Procedure ................................ 131
Diagnostic Procedure ............................................ 132
DTC P1721 VEHICLE SPEED SENSOR MTR ....... 133
Description ............................................................ 133
CONSULT-II Reference Value ............................... 133
On Board Diagnosis Logic .................................... 133
Possible Cause ..................................................... 133
DTC Confirmation Procedure ................................ 133
Diagnostic Procedure ............................................ 134
DTC P1730 A/T INTERLOCK ................................. 135
Description ............................................................ 135
On Board Diagnosis Logic .................................... 135
Possible Cause ..................................................... 135
DTC Confirmation Procedure ................................ 135
Judgement of A/T Interlock ................................... 136
Diagnostic Procedure ............................................ 136
DTC P1731 A/T 1ST ENGINE BRAKING ............... 138
Description ............................................................ 138
CONSULT-II Reference Value ............................... 138
On Board Diagnosis Logic .................................... 138
Possible Cause ..................................................... 138
DTC Confirmation Procedure ................................ 138
Diagnostic Procedure ............................................ 139
DTC P1752 INPUT CLUTCH SOLENOID VALVE .. 140
Description ............................................................ 140
CONSULT-II Reference Value ............................... 140
On Board Diagnosis Logic .................................... 140
Possible Cause ..................................................... 140
DTC Confirmation Procedure ................................ 140
Diagnostic Procedure ............................................ 141
DTC P1754 INPUT CLUTCH SOLENOID VALVE
FUNCTION .............................................................. 142
Description ............................................................ 142
CONSULT-II Reference Value ............................... 142
On Board Diagnosis Logic .................................... 142
Possible Cause ..................................................... 142

AT-4Revision: October 20052005 QX56 A/T Does Not Shift: D
3 → D4 ................................199
A/T Does Not Shift: D
4 → D5 ................................202
A/T Does Not Perform Lock-up ............................204
A/T Does Not Hold Lock-up Condition ..................206
Lock-up Is Not Released ......................................208
Engine Speed Does Not Return to Idle ................209
A/T Does Not Shift: 5th gear → 4th gear ..............210
A/T Does Not Shift: 4th gear → 3rd gear ..............213
A/T Does Not Shift: 3rd gear → 2nd gear .............214
A/T Does Not Shift: 2nd gear → 1st gear .............216
Vehicle Does Not Decelerate By Engine Brake ....219
A/T SHIFT LOCK SYSTEM .....................................222
Description ............................................................222
Shift Lock System Electrical Parts Location .........222
Wiring Diagram — A/T — SHIFT ..........................223
Shift Lock Control Unit Reference Values .............224
Component Inspection ..........................................225
SHIFT CONTROL SYSTEM ....................................227
Control Device Removal and Installation ..............227
Adjustment of A/T Position ...................................228
Checking of A/T Position ......................................228
ON-VEHICLE SERVICE ..........................................229
Oil Pan ..................................................................229
Control Valve With TCM and A/T Fluid Temperature
Sensor 2 ...............................................................231
Rear Oil Seal ........................................................241
AIR BREATHER HOSE ...........................................242
Removal and Installation ......................................242
TRANSMISSION ASSEMBLY ................................244
Removal and Installation (4x2) .............................244
Removal and Installation (4x4) .............................247
OVERHAUL .............................................................250Components .......................................................... 250
Oil Channel ........................................................... 258
Locations of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings .......................... 260
DISASSEMBLY ....................................................... 262
Disassembly .......................................................... 262
REPAIR FOR COMPONENT PARTS ...................... 280
Oil Pump ............................................................... 280
Front Sun Gear, 3rd One-Way Clutch ................... 282
Front Carrier, Input Clutch, Rear Internal Gear ..... 284
Mid Sun Gear, Rear Sun Gear, High and Low
Reverse Clutch Hub .............................................. 289
High and Low Reverse Clutch .............................. 294
Direct Clutch ......................................................... 296
ASSEMBLY ............................................................. 298
Assembly (1) ......................................................... 298
Adjustment ............................................................311
Assembly (2) ......................................................... 314
SERVICE DATA AND SPECIFICATIONS (SDS) .... 321
General Specifications .......................................... 321
Vehicle Speed When Shifting Gears ..................... 321
Vehicle Speed When Performing and Releasing
Complete Lock-up ................................................. 322
Vehicle Speed When Performing and Releasing
Slip Lock-up .......................................................... 322
Stall Speed ............................................................ 322
Line Pressure ........................................................ 322
A/T Fluid Temperature Sensor .............................. 322
Turbine Revolution Sensor .................................... 322
Vehicle Speed Sensor A/T (Revolution Sensor) ... 322
Reverse brake ....................................................... 323
Total End Play ....................................................... 323

AT-8
PRECAUTIONS
Revision: October 20052005 QX56
Precautions ECS00CDL

Before connecting or disconnecting the A/T assembly har-
ness connector, turn ignition switch “OFF” and disconnect
negative battery cable. Because battery voltage is applied
to TCM even if ignition switch is turned “OFF”.

After performing each TROUBLE DIAGNOSIS, perform
“DTC (Diagnostic Trouble Code) CONFIRMATION PROCE-
DURE”.
If the repair is completed the DTC should not be displayed
in the “DTC CONFIRMATION PROCEDURE”.

Always use the specified brand of ATF. Refer to MA-11, "RECOMMENDED FLUIDS AND LUBRICANTS" .

Use paper rags not cloth rags during work.

After replacing the ATF, dispose of the waste oil using the methods prescribed by law, ordinance, etc.

Before proceeding with disassembly, thoroughly clean the outside of the transmission. It is important to
prevent the internal parts from becoming contaminated by dirt or other foreign matter.

Disassembly should be done in a clean work area.

Use lint-free cloth or towels for wiping parts clean. Common shop rags can leave fibers that could interfere
with the operation of the transmission.

Place disassembled parts in order for easier and proper assembly.

All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or
reassembly.

Gaskets, seals and O-rings should be replaced any time the transmission is disassembled.

It is very important to perform functional tests whenever they are indicated.

The valve body contains precision parts and requires extreme care when parts are removed and serviced.
Place disassembled valve body parts in order for easier and proper assembly. Care will also prevent
springs and small parts from becoming scattered or lost.

Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own weight.

Before assembly, apply a coat of recommended ATF to all parts. Apply petroleum jelly to protect O-rings
and seals, or hold bearings and washers in place during assembly. Do not use grease.

Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.

Clean or replace ATF cooler if excessive foreign material is found in oil pan or clogging strainer. Refer to
AT- 1 3 , "
A/T Fluid Cooler Cleaning" .

After overhaul, refill the transmission with new ATF.

When the A/T drain plug is removed, only some of the fluid is drained. Old A/T fluid will remain in torque
converter and ATF cooling system.
Always follow the procedures under “Changing A/T Fluid” in the AT section when changing A/T fluid. Refer
to AT-13, "
Changing A/T Fluid" , AT-13, "Checking A/T Fluid" .
SEF 2 89 H
SEF 2 17 U

PREPARATION
AT-11
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Revision: October 20052005 QX56
—
(J-47002)
Transmission jack adapter kit
1. —
(J-47002-2)
Center bracket
2. —
(J-47002-3)
Adapter plate
3. —
(J-47002-4)
Adapter blockAssist in removal of transmission and transfer
case as one assembly using only one trans-
mission jack.
—
(J-47245)
Ring gear stopperRemoving and installing crankshaft pulley Tool number
(Kent-Moore No.)
Tool nameDescription
W CIA0499E
LBIA0451E

A/T FLUID
AT-13
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Revision: October 20052005 QX56
A/T FLUIDPFP:KLE40
Changing A/T FluidECS00CDQ
Refer to MA-24, "Changing A/T Fluid" .
Checking A/T FluidECS0 0CD R
Refer to MA-22, "Checking A/T Fluid" .
A/T Fluid Cooler CleaningECS00CDS
Whenever an automatic transmission is repaired, overhauled, or replaced, the A/T fluid cooler mounted in the
radiator must be inspected and cleaned.
Metal debris and friction material, if present, can become trapped in the A/T fluid cooler. This debris can con-
taminate the newly serviced A/T or, in severe cases, can block or restrict the flow of A/T fluid. In either case,
malfunction of the newly serviced A/T may result.
Debris, if present, may build up as A/T fluid enters the cooler inlet. It will be necessary to back flush the cooler
through the cooler outlet in order to flush out any built up debris.
A/T FLUID COOLER CLEANING PROCEDURE
1. Position an oil pan under the automatic transmission's inlet and outlet cooler hoses.
2. Identify the inlet and outlet fluid cooler hoses.
3. Disconnect the fluid cooler inlet and outlet rubber hoses from the
steel cooler tubes or bypass valve.
NOTE:
Replace the cooler hoses if rubber material from the hose
remains on the tube fitting.
4. Allow any A/T fluid that remains in the cooler hoses to drain into
the oil pan.
5. Insert the extension adapter hose of a can of Transmission
Cooler Cleaner (Nissan P/N 999MP-AM006) into the cooler out-
let hose.
CAUTION:

Wear safety glasses and rubber gloves when spraying
the Transmission Cooler Cleaner.

Spray cooler cleaner only with adequate ventilation.

Avoid contact with eyes and skin.

Do not breath vapors or spray mist.
6. Hold the hose and can as high as possible and spray Transmis-
sion Cooler Cleaner in a continuous stream into the cooler outlet
hose until fluid flows out of the cooler inlet hose for 5 seconds.
7. Insert the tip of an air gun into the end of the cooler outlet hose.
8. Wrap a shop rag around the air gun tip and of the cooler outlet
hose.
SCIA3830E
SCIA3831E
SCIA3832E

AT-14
A/T FLUID
Revision: October 20052005 QX56
9. Blow compressed air regulated to 5 - 9 kg/cm2 (70 - 130 psi) through the cooler outlet hose for 10 sec-
onds to force out any remaining fluid.
10. Repeat steps 5 through 9 three additional times.
11. Position an oil pan under the banjo bolts that connect the fluid cooler steel lines to the transmission.
12. Remove the banjo bolts.
13. Flush each steel line from the cooler side back toward the transmission by spraying Transmission Cooler
Cleaner in a continuous stream for 5 seconds.
14. Blow compressed air regulated to 5 - 9 kg/cm
2 (70 - 130 psi) through each steel line from the cooler side
back toward the transmission for 10 seconds to force out any remaining fluid.
15. Ensure all debris is removed from the steel cooler lines.
16. Ensure all debris is removed from the banjo bolts and fittings.
17. Perform AT-13, "
A/T FLUID COOLER CLEANING PROCEDURE" .
A/T FLUID COOLER DIAGNOSIS PROCEDURE
NOTE:
Insufficient cleaning of the cooler inlet hose exterior may lead to inaccurate debris identification.
1. Position an oil pan under the automatic transmission's inlet and outlet cooler hoses.
2. Clean the exterior and tip of the cooler inlet hose.
3. Insert the extension adapter hose of a can of Transmission
Cooler Cleaner (Nissan P/N 999MP-AM006) into the cooler out-
let hose.
CAUTION:

Wear safety glasses and rubber gloves when spraying
the Transmission Cooler Cleaner.

Spray cooler cleaner only with adequate ventilation.

Avoid contact with eyes and skin.

Do not breath vapors or spray mist.
4. Hold the hose and can as high as possible and spray Transmis-
sion Cooler Cleaner in a continuous stream into the cooler outlet
hose until fluid flows out of the cooler inlet hose for 5 seconds.
5. Tie a common white, basket-type coffee filter to the end of the
cooler inlet hose.
6. Insert the tip of an air gun into the end of the cooler outlet hose.
7. Wrap a shop rag around the air gun tip and end of cooler outlet
hose.
8. Blow compressed air regulated to 5 - 9 kg/cm
2 (70 - 130 psi)
through the cooler outlet hose to force any remaining A/T fluid
into the coffee filter.
9. Remove the coffee filter from the end of the cooler inlet hose.
10. Perform AT - 1 5 , "
A/T FLUID COOLER INSPECTION PROCE-
DURE" .
SCIA3831E
SCIA3833E
SCIA3834E