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AUTOMATIC TRANSAXLE
AT
GI
SECTION MA
EM
LC
CONTENTS
EC
DIAGNOSTIC TROUBLE CODE INDEX.................... 4 Line Pressure Test ................................................ 57
Alphabetical & P No. Index for DTC....................... 4 Road Test.............................................................. 58
PRECAUTIONS .......................................................... 5 TROUBLE DIAGNOSIS -- General Description ... 69 FE
Supplemental Restraint System (SRS)``AIR Symptom Chart ..................................................... 69
BAG'' and ``SEAT BELT PRE-TENSIONER''.......... 5 TCM Terminals and Reference Value................... 72
Precautions for On Board Diagnostic (OBD) TROUBLE DIAGNOSIS FOR POWER SUPPLY..... 76
CL
System of A/T and Engine...................................... 5 Main Power Supply and Ground Circuit ............... 76
Precautions ............................................................. 6 TROUBLE DIAGNOSIS FOR DTC P0705............... 78 MT
Service Notice or Precautions ................................ 7 Park/Neutral Position (PNP) Switch ..................... 78
Special Service Tools.............................................. 9 TROUBLE DIAGNOSIS FOR DTC P0710............... 83
Commercial Service Tools .................................... 12 A/T Fluid Temperature Sensor.............................. 83 AT
OVERALL SYSTEM ................................................. 13 TROUBLE DIAGNOSIS FOR DTC P0720............... 88
A/T Electrical Parts Location ................................ 13 Vehicle Speed Sensor A/T (Revolution sensor) ... 88
Circuit Diagram for Quick Pinpoint Check............ 14 TROUBLE DIAGNOSIS FOR DTC P0725............... 92 FA
Cross-sectional View ............................................ 15 Engine Speed Signal ............................................ 92
Hydraulic Control Circuit ....................................... 16 TROUBLE DIAGNOSIS FOR DTC P0731............... 96 RA
Shift Mechanism ................................................... 17 A/T 1st Gear Function .......................................... 96
Control System ..................................................... 26 TROUBLE DIAGNOSIS FOR DTC P0732............. 102
Control Mechanism ............................................... 28 A/T 2nd Gear Function ....................................... 102 BR
Control Valve......................................................... 33 TROUBLE DIAGNOSIS FOR DTC P0733............. 108
ON BOARD DIAGNOSTIC SYSTEM A/T 3rd Gear Function ........................................ 108
DESCRIPTION .......................................................... 34 TROUBLE DIAGNOSIS FOR DTC P0734............. 114 ST
Introduction ........................................................... 34 A/T 4th Gear Function ........................................ 114
OBD-II Function for A/T System ........................... 34 TROUBLE DIAGNOSIS FOR DTC P0740............. 121
RS
One or Two Trip Detection Logic of OBD-II ......... 34 Torque Converter Clutch Solenoid Valve............ 121
OBD-II Diagnostic Trouble Code (DTC) ............... 34 TROUBLE DIAGNOSIS FOR DTC P0744............. 126
Malfunction Indicator Lamp (MIL) ......................... 38 A/T TCC S/V Function (Lock-up)........................ 126 BT
CONSULT-II .......................................................... 38 TROUBLE DIAGNOSIS FOR DTC P0745............. 134
Diagnostic Procedure Without CONSULT-II ......... 45 Line Pressure Solenoid Valve............................. 134
TROUBLE DIAGNOSIS -- Introduction................. 49 TROUBLE DIAGNOSIS FOR DTC P0750............. 139 HA
Introduction ........................................................... 49 Shift Solenoid Valve A......................................... 139
Diagnostic Worksheet ........................................... 50 TROUBLE DIAGNOSIS FOR DTC P0755............. 144
EL
Work Flow ............................................................. 53 Shift Solenoid Valve B ........................................ 144
TROUBLE DIAGNOSIS -- Basic Inspection ......... 54 TROUBLE DIAGNOSIS FOR DTC P1705............. 149
A/T Fluid Check .................................................... 54 Throttle Position Sensor ..................................... 149 IDX
Stall Test ............................................................... 54 TROUBLE DIAGNOSIS FOR DTC P1760............. 156
Overrun Clutch Solenoid Valve........................... 156
CONTENTS (Cont'd.)
TROUBLE DIAGNOSIS FOR BATT/FLUID TROUBLE DIAGNOSES -- A/T Shift Lock
TEMP SEN .............................................................. 161 System.................................................................... 200
A/T Fluid Temperature Sensor Circuit and Description .......................................................... 200
TCM Power Source ............................................ 161 Shift Lock System Electrical Parts Location....... 200
TROUBLE DIAGNOSIS FOR VHCL SPEED Wiring Diagram -- SHIFT -- .............................. 201
SEN MTR................................................................. 166 Diagnostic Procedure.......................................... 202
Vehicle Speed Sensor MTR................................ 166 Key Interlock Cable............................................. 204
TROUBLE DIAGNOSIS FOR CONTROL UNIT Component Check .............................................. 205
(RAM), CONTROL UNIT (ROM) ............................ 170 ON-VEHICLE SERVICE ......................................... 207
TCM (Transmission Control Module).................. 170 Control Valve Assembly and Accumulator.......... 207
TROUBLE DIAGNOSIS FOR CONTROL UNIT Revolution Sensor Replacement ........................ 208
(EEPROM)............................................................... 172 Park/Neutral Position (PNP) Switch
TCM (Transmission Control Module).................. 172 Adjustment .......................................................... 208
TROUBLE DIAGNOSES FOR SYMPTOMS.......... 174 Control Cable Adjustment ................................... 209
Non-detectable Items.......................................... 174 Differential Side Oil Seal Replacement .............. 209
1. O/D OFF Indicator Lamp Does Not Come REMOVAL AND INSTALLATION ........................... 210
On ....................................................................... 177 Removal .............................................................. 210
2. Engine Cannot Be Started In ``P'' and ``N'' Installation ........................................................... 211
Position ............................................................... 178 MAJOR OVERHAUL .............................................. 213
3. In ``P'' Position, Vehicle Moves Forward or Locations of Adjusting Shims, Needle
Backward When Pushed .................................... 178 Bearings, Thrust Washers and Snap Rings ....... 216
4. In ``N'' Position, Vehicle Moves ...................... 179 Oil Channel ......................................................... 217
5. Large Shock. ``N'' ``R'' Position .................. 180 DISASSEMBLY....................................................... 218
6. Vehicle Does Not Creep Backward In ``R'' REPAIR FOR COMPONENT PARTS..................... 232
Position ............................................................... 181 Manual Shaft....................................................... 232
7. Vehicle Does Not Creep Forward In ``D'', Oil Pump ............................................................. 234
``2'' or ``1'' Position .............................................. 182 Control Valve Assembly ...................................... 238
8. Vehicle Cannot Be Started From D1.............. 183 Control Valve Upper Body .................................. 246
9. A/T Does Not Shift: D1 D2 or Does Not Control Valve Lower Body .................................. 250
Kickdown: D4 D2 ........................................... 184 Reverse Clutch ................................................... 252
10. A/T Does Not Shift: D2 D3....................... 185 High Clutch ......................................................... 255
11. A/T Does Not Shift: D3 D4....................... 186 Forward Clutch and Overrun Clutch................... 259
12. A/T Does Not Perform Lock-up .................... 187 Low & Reverse Brake......................................... 265
13. A/T Does Not Hold Lock-up Condition ......... 188 Rear Internal Gear, Forward Clutch Hub and
14. Lock-up Is Not Released .............................. 188 Overrun Clutch Hub ............................................ 267
15. Engine Speed Does Not Return To Idle Output Shaft, Idler Gear, Reduction Pinion
(Light Braking D4 D3) .................................... 189 Gear and Bearing Retainer................................. 271
16. Vehicle Does Not Start From D1.................. 190 Band Servo Piston Assembly ............................. 276
17. A/T Does Not Shift: D4 D3, When Final Drive........................................................... 281
Overdrive Control Switch ``ON'' ``OFF'' .......... 190 ASSEMBLY............................................................. 285
18. A/T Does Not Shift: D3 22, When Assembly 1 ......................................................... 285
Selector Lever ``D'' ``2'' Position..................... 191 Adjustment 1 ....................................................... 285
19. A/T Does Not Shift: 22 11, When Assembly 2 ......................................................... 290
Selector Lever ``2'' ``1'' Position ..................... 191 Adjustment 2 ....................................................... 296
20. Vehicle Does Not Decelerate By Engine Assembly 3 ......................................................... 298
Brake................................................................... 192 SERVICE DATA AND SPECIFICATIONS (SDS) ... 304
21. TCM Self-diagnosis Does Not Activate General Specifications ....................................... 304
(Park/Neutral Position (PNP), Overdrive Specifications and Adjustments .......................... 304
Control and Throttle Position Switch Circuit Shift Solenoid Valves .......................................... 310
Checks) ............................................................... 192
AT-2
CONTENTS (Cont'd.)
Resistance .......................................................... 310 Revolution sensor ............................................... 310
ATF Temp sensor................................................ 310 Dropping resistor................................................. 311
GI
When you read wiring diagrams:
q Read GI section, ``HOW TO READ WIRING DIAGRAMS''.
MA
q See EL section, ``POWER SUPPLY ROUTING'' for power distribution circuit.
When you perform trouble diagnoses, read GI section, ``HOW TO FOLLOW FLOW EM
CHART IN TROUBLE DIAGNOSES'' and ``HOW TO PERFORM EFFICIENT DIAGNO-
SIS FOR AN ELECTRICAL INCIDENT''.
LC
EC
FE
CL
MT
AT
FA
RA
BR
ST
RS
BT
HA
EL
IDX
AT-3
DIAGNOSTIC TROUBLE CODE INDEX
Alphabetical & P No. Index for DTC
ALPHABETICAL INDEX FOR DTC P NO. INDEX FOR DTC
Items DTC DTC Items
Reference Reference
(CONSULT-II screen CONSULT-II CONSULT-II (CONSULT-II screen
ECM*1 page ECM*1 page
terms) GST*2 GST*2 terms)
A/T 1ST GR FNCTN 1103 P0731 AT-96 P0705 1101 PNP SW/CIRC AT-78
A/T 2ND GR FNCTN 1104 P0732 AT-102 P0710 1208 ATF TEMP SEN/CIRC AT-83
A/T 3RD GR FNCTN 1105 P0733 AT-108 P0720 1102 VEH SPD SEN/CIR AT*4 AT-88
A/T 4TH GR FNCTN 1106 P0734 AT-114 P0725 1207 ENGINE SPEED SIG AT-92
A/T TCC S/V FNCTN 1107 P0744 AT-126 P0731 1103 A/T 1ST GR FNCTN AT-96
ATF TEMP SEN/CIRC 1208 P0710 AT-83 P0732 1104 A/T 2ND GR FNCTN AT-102
ENGINE SPEED SIG 1207 P0725 AT-92 P0733 1105 A/T 3RD GR FNCTN AT-108
L/PRESS SOL/CIRC 1205 P0745 AT-134 P0734 1106 A/T 4TH GR FNCTN AT-114
O/R CLTCH SOL/CIRC 1203 P1760 AT-156 P0740 1204 TCC SOLENOID/CIRC AT-121
PNP SW/CIRC 1101 P0705 AT-78 P0744 1107 A/T TCC S/V FNCTN AT-126
SFT SOL A/CIRC*3 1108 P0750 AT-139 P0745 1205 L/PRESS SOL/CIRC AT-134
SFT SOL B/CIRC*3 1201 P0755 AT-144 P0750 1108 SFT SOL A/CIRC*3 AT-139
TCC SOLENOID/CIRC 1204 P0740 AT-121 P0755 1201 SFT SOL B/CIRC*3 AT-144
TP SEN/CIRC A/T*3 1206 P1705 AT-149 P1705 1206 TP SEN/CIRC A/T*3 AT-149
VEH SPD SEN/CIR AT*4 1102 P0720 AT-88 P1760 1203 O/R CLTCH SOL/CIRC AT-156
*1: In Diagnostic Test Mode II (Self-diagnostic results),
these numbers are controlled by NISSAN.
*2: These numbers are prescribed by SAE J2012.
*3: When the fail-safe operation occurs, the MIL illumi-
nates.
*4: The MIL illuminates, when both the ``Revolution sensor
signal'' and the ``Vehicle speed signal'' meet the fail-
safe condition at the same time.
AT-4
PRECAUTIONS
Supplemental Restraint System (SRS)
``AIR BAG'' and ``SEAT BELT
PRE-TENSIONER'' GI
The Supplemental Restraint System such as ``AIR BAG'' and ``SEAT BELT PRE-TENSIONER'' used along
with a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. The SRS composition which is available to NISSAN MODEL L30 is as follows (The MA
composition varies according to the destination and optional equipment.):
q For a frontal collision
EM
The Supplement Restraint System consists of driver air bag module (located in the center of the
steering wheel), front passenger air bag module (located on the instrument panel on passenger side),
seat belt pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable. LC
q For a side collision
The Supplemental Restraint System consists of front side air bag module (located in the outer side
of front seat), satellite sensor, diagnosis sensor unit (one of components of air bags for a frontal EC
collision), wiring harness, warning lamp (one of components of air bags for a frontal collision).
q Information necessary to service the system safely is included in the RS section of this Service
Manual. FE
WARNING:
q To avoid rendering the SRS inoperative, which could increase the risk of personal injury or
death in the event of a collision which would result in air bag inflation, all maintenance should CL
be performed by an authorized NISSAN dealer.
q Improper maintenance, including incorrect removal and installation of the SRS, can lead to
personal injury caused by unintentional activation of the system. MT
For removal of Spiral Cable and Air Bag Module, see the RS section.
q Do not use electrical test equipment on any circuit related to the SRS unless instructed to in
this Service Manual. Spiral cable and wiring harnesses (except ``SEAT BELT PRE-TEN- AT
SIONER'') covered with yellow insulation either just before the harness connectors or for the
complete harness are related to the SRS.
Precautions for On Board Diagnostic (OBD) FA
System of A/T and Engine
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn RA
the driver of a malfunction causing emission deterioration.
CAUTION:
q Be sure to turn the ignition switch OFF and disconnect the negative battery terminal before BR
any repair or inspection work. The open/short circuit of related switches, sensors, solenoid
valves, etc. will cause the MIL to light up.
q Be sure to connect and lock the connectors securely after work. A loose (unlocked) connec- ST
tor will cause the MIL to light up due to an open circuit. (Be sure the connector is free from
water, grease, dirt, bent terminals, etc.)
RS
q Be sure to route and secure the harnesses properly after work. Interference of the harness with
a bracket, etc. may cause the MIL to light up due to a short circuit.
q Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber BT
tube may cause the MIL to light up due to a malfunction of the EGR system or fuel injection
system, etc.
q Be sure to erase the unnecessary malfunction information (repairs completed) from the TCM HA
and ECM before returning the vehicle to the customer.
q Certain systems and components, especially those related to OBD, may use a new style
slide-locking type harness connector. For description and how to disconnect, refer to EL-5 EL
Section (``Description'', ``HARNESS CONNECTOR'').
IDX
AT-5
PRECAUTIONS
Precautions
q Before connecting or disconnecting the TCM harness
connector, turn ignition switch OFF and disconnect
negative battery terminal. Failure to do so may damage
the TCM. Because battery voltage is applied to TCM
even if ignition switch is turned off.
SEF289H
q When connecting or disconnecting pin connectors into
or from TCM, take care not to damage pin terminals
(bend or break).
Make sure that there are not any bends or breaks on
TCM pin terminal, when connecting pin connectors.
AAT470A
q Before replacing TCM, perform TCM input/output signal
inspection and make sure whether TCM functions prop-
erly or not. (See page AT-72.)
MEF040DA
q After performing each TROUBLE DIAGNOSIS, perform
``DTC (Diagnostic Trouble Code) CONFIRMATION
PROCEDURE''.
The DTC should not be displayed in the ``DTC CONFIR-
MATION PROCEDURE'' if the repair is completed.
SAT964I
AT-6
PRECAUTIONS
Precautions (Cont'd)
q Before proceeding with disassembly, thoroughly clean the outside of the transaxle. It is important to
prevent the internal parts from becoming contaminated by dirt or other foreign matter.
q Disassembly should be done in a clean work area.
q Use lint-free cloth or towels for wiping parts clean. Common shop rags can leave fibers that could GI
interfere with the operation of the transaxle.
q Place disassembled parts in order for easier and proper assembly.
q All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspec- MA
tion or reassembly.
q Gaskets, seals and O-rings should be replaced any time the transaxle is disassembled.
EM
q It is very important to perform functional tests whenever they are indicated.
q The valve body contains precision parts and requires extreme care when parts are removed and ser-
viced. Place disassembled valve body parts in order for easier and proper assembly. Care will also LC
prevent springs and small parts from becoming scattered or lost.
q Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own
weight. EC
q 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.
q Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling. FE
q Replace ATF cooler if excessive foreign material is found in oil pan or clogging strainer. Refer to ``ATF
COOLER SERVICE'' (Refer to AT-8).
q After overhaul, refill the transaxle with new ATF. CL
q 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 MA section when changing A/T fluid. MT
Service Notice or Precautions
AT
FAIL-SAFE
The TCM has an electronic Fail-Safe (limp home mode). This allows the vehicle to be driven even if a
major electrical input/output device circuit is damaged. FA
Under Fail-Safe, the vehicle always runs in third gear, even with a shift lever position of ``1'', ``2'' or ``D''.
The customer may complain of sluggish or poor acceleration.
When the ignition key is turned ``ON'' following Fail-Safe operation, O/D OFF indicator lamp blinks for RA
about 8 seconds. (For ``TCM SELF-DIAGNOSTIC PROCEDURE (No Tools)'', refer to AT-45.)
Fail-Safe may occur without electrical circuit damage if the vehicle is driven under extreme conditions
(such as excessive wheel spin followed by sudden braking). To recover normal shift pattern, turn the BR
ignition key ``OFF'' for 5 seconds, then ``ON''.
The blinking of the O/D OFF indicator lamp for about 8 seconds will appear only once and be cleared.
The customer may resume normal driving conditions. ST
Always follow the ``WORK FLOW'' (Refer to AT-53).
The SELF-DIAGNOSIS results will be as follows:
RS
The first SELF-DIAGNOSIS will indicate damage to the vehicle speed sensor or the revolution
sensor.
During the next SELF-DIAGNOSIS, performed after checking the sensor, no damages will be indi- BT
cated.
TORQUE CONVERTER SERVICE HA
The torque converter should be replaced under any of the following conditions:
q External leaks in the hub weld area.
q Converter hub is scored or damaged. EL
q Converter pilot is broken, damaged or fits poorly into crankshaft.
q Steel particles are found after flushing the cooler and cooler lines.
q Pump is damaged or steel particles are found in the converter. IDX
q Vehicle has TCC shudder and/or no TCC apply. Replace only after all hydraulic and electrical diag-
noses have been made. (Converter clutch material may be glazed.)
q Converter is contaminated with engine coolant containing antifreeze.
q Internal failure of stator roller clutch.
q Heavy clutch debris due to overheating (blue converter).
AT-7
PRECAUTIONS
Service Notice or Precautions (Cont'd)
q Steel particles or clutch lining material found in fluid filter or on magnet when no internal parts in unit
are worn or damaged -- indicates that lining material came from converter.
The torque converter should not be replaced if:
q The fluid has an odor, is discolored, and there is no evidence of metal or clutch facing particles.
q The threads in one or more of the converter bolt holes are damaged.
q Transaxle failure did not display evidence of damaged or worn internal parts, steel particles or clutch
plate lining material in unit and inside the fluid filter.
q Vehicle has been exposed to high mileage (only). The exception may be where the torque converter
clutch dampener plate lining has seen excess wear by vehicles operated in heavy and/or constant
traffic, such as taxi, delivery or police use.
ATF COOLER SERVICE
Replace ATF cooler if excessive foreign material is found in oil pan or clogging strainer.
Replace radiator lower tank (which includes ATF cooler) with a new one and flush cooler line using
cleaning solvent and compressed air.
OBD-II SELF-DIAGNOSIS
q A/T self-diagnosis is performed by the TCM in combination with the ECM. The results can be read
through the blinking pattern of the O/D OFF indicator or the malfunction indicator lamp (MIL). Refer
to the table on AT-39 for the indicator used to display each self-diagnostic result.
q The self-diagnostic results indicated by the MIL are automatically stored in both the ECM and TCM
memories.
Always perform the procedure ``HOW TO ERASE DTC'' on AT-36 to complete the repair and
avoid unnecessary blinking of the MIL.
q The following self-diagnostic items can be detected using ECM self-diagnostic results mode* only
when the O/D OFF indicator lamp does not indicate any malfunctions.
-Park/Neutral Position (PNP) switch
-A/T 1st, 2nd, 3rd, or 4th gear function
-A/T TCC S/V function (lock-up).
*: For details of OBD-II, refer to EC-43 section (``ON BOARD DIAGNOSTIC SYSTEM DESCRIP-
TION'').
q Certain systems and components, especially those related to OBD, may use a new style
slide-locking type harness connector. For description and how to disconnect, refer to EL-5
section, ``Description `HARNESS CONNECTOR'.''
AT-8
PRECAUTIONS
Special Service Tools
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number GI
(Kent-Moore No.) Description
Tool name
MA
KV381054S0 q Removing differential side oil seals
(J34286) q Removing differential side bearing outer
Puller race EM
q Removing idler gear bearing outer race
a: 250 mm (9.84 in) LC
NT414 b: 160 mm (6.30 in)
ST33400001 Installing differential side oil seal (RH side) EC
(J26082) Installing oil seal on oil pump housing
Drift
FE
a: 60 mm (2.36 in) dia.
NT086 b: 47 mm (1.85 in) dia.
(J34301-C) Measuring line pressure
CL
Oil pressure gauge set
1 (J34301-1)
Oil pressure gauge
MT
2 (J34301-2)
Hoses
3 (J34298) AT
Adapter
4 (J34282-2)
Adapter FA
5 (790-301-1230-A)
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