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AUTOMATIC TRANSAXLE
AT
GI
SECTION MA
EM
LC
CONTENTS
EC
DIAGNOSTIC TROUBLE CODE INDEX.................... 4 Road Test.............................................................. 58
Alphabetical & P No. Index for DTC....................... 4 TROUBLE DIAGNOSIS -- General Description ... 69
PRECAUTIONS .......................................................... 5 Symptom Chart ..................................................... 69 FE
Supplemental Restraint System (SRS)``AIR TCM Terminals and Reference Value................... 72
BAG'' and ``SEAT BELT PRE-TENSIONER''.......... 5 TROUBLE DIAGNOSIS FOR POWER SUPPLY..... 76
Precautions for On Board Diagnostic (OBD) Main Power Supply and Ground Circuit ............... 76
CL
System of A/T and Engine...................................... 5 TROUBLE DIAGNOSIS FOR DTC P0705............... 78
Precautions ............................................................. 6 Park/Neutral Position (PNP) Switch ..................... 78 MT
Service Notice or Precautions ................................ 7 TROUBLE DIAGNOSIS FOR DTC P0710............... 83
Special Service Tools.............................................. 9 A/T Fluid Temperature Sensor.............................. 83
Commercial Service Tools .................................... 12 TROUBLE DIAGNOSIS FOR DTC P0720............... 88 AT
OVERALL SYSTEM ................................................. 13 Vehicle Speed Sensor A/T (Revolution sensor) ... 88
A/T Electrical Parts Location ................................ 13 TROUBLE DIAGNOSIS FOR DTC P0725............... 92
Circuit Diagram for Quick Pinpoint Check............ 14 Engine Speed Signal ............................................ 92 FA
Cross-sectional View ............................................ 15 TROUBLE DIAGNOSIS FOR DTC P0731............... 95
Hydraulic Control Circuit ....................................... 16 A/T 1st Gear Function .......................................... 95 RA
Shift Mechanism ................................................... 17 TROUBLE DIAGNOSIS FOR DTC P0732............. 101
Control System ..................................................... 26 A/T 2nd Gear Function ....................................... 101
Control Mechanism ............................................... 28 TROUBLE DIAGNOSIS FOR DTC P0733............. 107 BR
Control Valve......................................................... 33 A/T 3rd Gear Function ........................................ 107
ON BOARD DIAGNOSTIC SYSTEM TROUBLE DIAGNOSIS FOR DTC P0734............. 113
DESCRIPTION .......................................................... 34 A/T 4th Gear Function ........................................ 113 ST
Introduction ........................................................... 34 TROUBLE DIAGNOSIS FOR DTC P0740............. 120
OBD-II Function for A/T System ........................... 34 Torque Converter Clutch Solenoid Valve............ 120
RS
One or Two Trip Detection Logic of OBD-II ......... 34 TROUBLE DIAGNOSIS FOR DTC P0744............. 125
OBD-II Diagnostic Trouble Code (DTC) ............... 34 A/T TCC S/V Function (Lock-up)........................ 125
Malfunction Indicator Lamp (MIL) ......................... 38 TROUBLE DIAGNOSIS FOR DTC P0745............. 133 BT
CONSULT-II .......................................................... 38 Line Pressure Solenoid Valve............................. 133
Diagnostic Procedure Without CONSULT-II ......... 45 TROUBLE DIAGNOSIS FOR DTC P0750............. 138
TROUBLE DIAGNOSIS -- Introduction................. 49 Shift Solenoid Valve A ........................................ 138 HA
Introduction ........................................................... 49 TROUBLE DIAGNOSIS FOR DTC P0755............. 143
Diagnostic Worksheet ........................................... 50 Shift Solenoid Valve B ........................................ 143
EL
Work Flow ............................................................. 53 TROUBLE DIAGNOSIS FOR DTC P1705............. 148
TROUBLE DIAGNOSIS -- Basic Inspection ......... 54 Throttle Position Sensor ..................................... 148
A/T Fluid Check .................................................... 54 TROUBLE DIAGNOSIS FOR DTC P1760............. 154 IDX
Stall Test ............................................................... 54 Overrun Clutch Solenoid Valve........................... 154
Line Pressure Test ................................................ 57
CONTENTS (Cont'd.)
TROUBLE DIAGNOSIS FOR BATT/FLUID TROUBLE DIAGNOSES -- A/T Shift Lock
TEMP SEN .............................................................. 158 System.................................................................... 197
A/T Fluid Temperature Sensor Circuit and Description .......................................................... 197
TCM Power Source ............................................ 158 Shift Lock System Electrical Parts Location....... 197
TROUBLE DIAGNOSIS FOR VHCL SPEED Wiring Diagram -- SHIFT -- .............................. 198
SEN MTR................................................................. 163 Diagnostic Procedure.......................................... 199
Vehicle Speed Sensor MTR................................ 163 Key Interlock Cable............................................. 201
TROUBLE DIAGNOSIS FOR CONTROL UNIT Component Check .............................................. 202
(RAM), CONTROL UNIT (ROM) ............................ 167 ON-VEHICLE SERVICE ......................................... 204
TCM (Transmission Control Module).................. 167 Control Valve Assembly and Accumulator.......... 204
TROUBLE DIAGNOSIS FOR CONTROL UNIT Revolution Sensor Replacement ........................ 205
(EEPROM)............................................................... 169 Park/Neutral Position (PNP) Switch
TCM (Transmission Control Module).................. 169 Adjustment .......................................................... 205
TROUBLE DIAGNOSES FOR SYMPTOMS.......... 171 Control Cable Adjustment ................................... 206
Non-detectable Items.......................................... 171 Differential Side Oil Seal Replacement .............. 206
1. O/D OFF Indicator Lamp Does Not Come REMOVAL AND INSTALLATION ........................... 207
On ....................................................................... 174 Removal .............................................................. 207
2. Engine Cannot Be Started In ``P'' and ``N'' Installation ........................................................... 208
Position ............................................................... 175 MAJOR OVERHAUL .............................................. 210
3. In ``P'' Position, Vehicle Moves Forward or Locations of Adjusting Shims, Needle
Backward When Pushed .................................... 175 Bearings, Thrust Washers and Snap Rings ....... 213
4. In ``N'' Position, Vehicle Moves ...................... 176 Oil Channel ......................................................... 214
5. Large Shock. ``N'' ``R'' Position .................. 177 DISASSEMBLY....................................................... 215
6. Vehicle Does Not Creep Backward In ``R'' REPAIR FOR COMPONENT PARTS..................... 229
Position ............................................................... 178 Manual Shaft....................................................... 229
7. Vehicle Does Not Creep Forward In ``D'', Oil Pump ............................................................. 231
``2'' or ``1'' Position .............................................. 179 Control Valve Assembly ...................................... 235
8. Vehicle Cannot Be Started From D1.............. 180 Control Valve Upper Body .................................. 243
9. A/T Does Not Shift: D1 D2 or Does Not Control Valve Lower Body .................................. 247
Kickdown: D4 D2 ........................................... 181 Reverse Clutch ................................................... 249
10. A/T Does Not Shift: D2 D3....................... 182 High Clutch ......................................................... 252
11. A/T Does Not Shift: D3 D4 ....................... 183 Forward Clutch and Overrun Clutch................... 256
12. A/T Does Not Perform Lock-up .................... 184 Low & Reverse Brake......................................... 262
13. A/T Does Not Hold Lock-up Condition ......... 185 Rear Internal Gear, Forward Clutch Hub and
14. Lock-up Is Not Released .............................. 185 Overrun Clutch Hub ............................................ 264
15. Engine Speed Does Not Return To Idle Output Shaft, Idler Gear, Reduction Pinion
(Light Braking D4 D3) .................................... 186 Gear and Bearing Retainer................................. 268
16. Vehicle Does Not Start From D1.................. 187 Band Servo Piston Assembly ............................. 273
17. A/T Does Not Shift: D4 D3, When Final Drive........................................................... 278
Overdrive Control Switch ``ON'' ``OFF'' .......... 187 ASSEMBLY............................................................. 282
18. A/T Does Not Shift: D3 22, When Assembly 1 ......................................................... 282
Selector Lever ``D'' ``2'' Position ..................... 188 Adjustment 1 ....................................................... 282
19. A/T Does Not Shift: 22 11, When Assembly 2 ......................................................... 287
Selector Lever ``2'' ``1'' Position ..................... 188 Adjustment 2 ....................................................... 293
20. Vehicle Does Not Decelerate By Engine Assembly 3 ......................................................... 295
Brake................................................................... 189 SERVICE DATA AND SPECIFICATIONS (SDS) ... 302
21. TCM Self-diagnosis Does Not Activate General Specifications ....................................... 302
(Park/Neutral Position (PNP), Overdrive Specifications and Adjustments .......................... 302
Control and Throttle Position Switch Circuit Shift Solenoid Valves .......................................... 308
Checks) ............................................................... 189 Resistance .......................................................... 308
AT-2
CONTENTS (Cont'd.)
ATF Temp sensor................................................ 308 Dropping resistor................................................. 309
Revolution sensor ............................................... 308
GI
When you read wiring diagrams:
b Read GI section, ``HOW TO READ WIRING DIAGRAMS''.
MA
b 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-95 P0705 1101 PNP SW/CIRC AT-78
A/T 2ND GR FNCTN 1104 P0732 AT-101 P0710 1208 ATF TEMP SEN/CIRC AT-83
A/T 3RD GR FNCTN 1105 P0733 AT-107 P0720 1102 VEH SPD SEN/CIR AT*4 AT-88
A/T 4TH GR FNCTN 1106 P0734 AT-113 P0725 1207 ENGINE SPEED SIG AT-92
A/T TCC S/V FNCTN 1107 P0744 AT-125 P0731 1103 A/T 1ST GR FNCTN AT-95
ATF TEMP SEN/CIRC 1208 P0710 AT-83 P0732 1104 A/T 2ND GR FNCTN AT-101
ENGINE SPEED SIG 1207 P0725 AT-92 P0733 1105 A/T 3RD GR FNCTN AT-107
L/PRESS SOL/CIRC 1205 P0745 AT-133 P0734 1106 A/T 4TH GR FNCTN AT-113
O/R CLTCH SOL/CIRC 1203 P1760 AT-154 P0740 1204 TCC SOLENOID/CIRC AT-120
PNP SW/CIRC 1101 P0705 AT-78 P0744 1107 A/T TCC S/V FNCTN AT-125
SFT SOL A/CIRC*3 1108 P0750 AT-138 P0745 1205 L/PRESS SOL/CIRC AT-133
SFT SOL B/CIRC*3 1201 P0755 AT-143 P0750 1108 SFT SOL A/CIRC*3 AT-138
TCC SOLENOID/CIRC 1204 P0740 AT-120 P0755 1201 SFT SOL B/CIRC*3 AT-143
TP SEN/CIRC A/T*3 1206 P1705 AT-148 P1705 1206 TP SEN/CIRC A/T*3 AT-148
VEH SPD SEN/CIR AT*4 1102 P0720 AT-88 P1760 1203 O/R CLTCH SOL/CIRC AT-154
*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 system composition which is available to NISSAN MODEL L30 is as follows MA
(The composition varies according to the destination and optional equipment):
b For a frontal collision
EM
The Supplemental 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),
front seat belt pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable. LC
b For a side collision
The Supplemental Restraint System consists of front side air bag module (located in the outer side
of front seat), side air bag (satellite) sensor, diagnosis sensor unit (one of components of air bags for EC
a frontal collision), wiring harness, warning lamp (one of components of air bags for a frontal colli-
sion).
Information necessary to service the system safely is included in the RS section of this Service Manual. FE
WARNING:
b 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.
b Improper maintenance, including incorrect removal and installation of the SRS, can lead to
personal injury caused by unintentional activation of the system. For removal of Spiral Cable MT
and Air Bag Module, see the RS section.
b 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 AT
PRE-TENSIONER'') 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:
b 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.
b 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
b 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.
b 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.
b Be sure to erase the unnecessary malfunction information (repairs completed) from the TCM HA
and ECM before returning the vehicle to the customer.
b 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 sec- EL
tion (``Description'', ``HARNESS CONNECTOR'').
IDX
AT-5
PRECAUTIONS
Precautions
b 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
b 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
b Before replacing TCM, perform TCM input/output signal
inspection and make sure whether TCM functions prop-
erly or not. (See page AT-72.)
MEF040DA
b 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)
b 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.
b Disassembly should be done in a clean work area.
b 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.
b Place disassembled parts in order for easier and proper assembly.
b All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspec- MA
tion or reassembly.
b Gaskets, seals and O-rings should be replaced any time the transaxle is disassembled.
EM
b It is very important to perform functional tests whenever they are indicated.
b 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.
b Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own
weight. EC
b 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.
b Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling. FE
b Replace ATF cooler if excessive foreign material is found in oil pan or clogging strainer. Refer to ``ATF
COOLER SERVICE''. Refer to AT-8.
b After overhaul, refill the transaxle with new ATF. CL
b 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.]
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. BR
Always follow the ``WORK FLOW''. Refer to AT-53.
The SELF-DIAGNOSIS results will be as follows:
The first SELF-DIAGNOSIS will indicate damage to the vehicle speed sensor or the revolution ST
sensor.
During the next SELF-DIAGNOSIS, performed after checking the sensor, no damages will be indi-
RS
cated.
TORQUE CONVERTER SERVICE BT
The torque converter should be replaced under any of the following conditions:
b External leaks in the hub weld area.
b Converter hub is scored or damaged. HA
b Converter pilot is broken, damaged or fits poorly into crankshaft.
b Steel particles are found after flushing the cooler and cooler lines.
b Pump is damaged or steel particles are found in the converter. EL
b 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.)
b Converter is contaminated with engine coolant containing antifreeze. IDX
b Internal failure of stator roller clutch.
b Heavy clutch debris due to overheating (blue converter).
AT-7
PRECAUTIONS
Service Notice or Precautions (Cont'd)
b 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:
b The fluid has an odor, is discolored, and there is no evidence of metal or clutch facing particles.
b The threads in one or more of the converter bolt holes are damaged.
b 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.
b 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
b 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.
b 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.
b 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 section (``ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION'').
b 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
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 b Removing differential side oil seals
(J34286) b Removing differential side bearing outer
Puller race EM
b 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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