2003 NISSAN ALMERA N16 Engine Control

NJMT0090
SMT928D
RemovalNJMT0090S01CAUTION:
Remove the crankshaft position sensor (POS) from transaxle
assembly before separating transaxle from engine.
Be careful not to damage sensor edge.
1. Remove battery and its bracket.
2. Remove fuse box from battery bracket.
3. Remove air cleaner box with mass air flow sensor.
4. Remove air breather hose and vacuum pump hose.
SMT650CB
5. Remove terminal and connector from starter motor.
6. Remove starter motor from transaxle.
7. Remove clutch hose clamp.
8. Remove clutch operating cylinder from transaxle.
9. Disconnect speedometer pinion, PNP switch harness connec-
tors and ground harness.
10. Remove crankshaft position sensor (POS) from transaxle front
side.
11. Remove front exhaust tube.
SMT929D
12. Remove shift control rod and support rod bracket from tran-
saxle.
13. Drain gear oil from transaxle.
14. Draw out drive shafts from transaxle. Refer to AX-11,
“Removal”.
15. Support engine and transaxle by placing a jack under the tran-
saxle.
16. Remove bolts securing center member.
SMT950D
17. Take out engine mounting bracket and transaxle installation
bolts. Refer to EM-67, “Removal and Installation”.
18. Remove bolts securing transaxle under side.
19. Temporarily tighten center member.
20. Lower the lift.
REMOVAL AND INSTALLATIONRS5F50A
Removal
MT-26

AT-1
AUTOMATIC TRANSAXLE
C TRANSMISSION/TRANSAXLE
CONTENTS
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SECTION
A
B
AT
AUTOMATIC TRANSAXLE
PRECAUTIONS .......................................................... 5
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 5
Precautions for On Board Diagnostic (EURO-OBD)
System of A/T and Engine — Euro-OBD — ............. 5
Precautions for Trouble Diagnosis ........................... 5
Precautions for Harness Repair ............................... 5
Precautions .............................................................. 6
Service Notice or Precautions .................................. 7
Wiring Diagrams and Trouble Diagnosis .................. 8
PREPARATION ........................................................... 9
Special Service Tools ............................................... 9
Commercial Service Tools ...................................... 12
A/T FLUID ................................................................. 13
Checking A/T Fluid ................................................. 13
Changing A/T Fluid ............................................. ... 13
OVERALL SYSTEM ................................................. 14
A/T Electrical Parts Location .................................. 14
Circuit Diagram ...................................................... 15
Cross-Sectional View ............................................. 16
Hydraulic Control Circuit ........................................ 17
Shift Mechanism ..................................................... 18
Control System ....................................................... 27
Control Mechanism ................................................ 28
Control Valve .......................................................... 34
EURO-OBD
TROUBLE DIAGNOSIS — INDEX ........................... 35
Alphabetical & P No. Index for DTC ....................... 35
ON BOARD DIAGNOSTIC SYSTEM DESCRIP-
TION .......................................................................... 37
Introduction ............................................................ 37
EURO-OBD Function for A/T System .................... 37
One or Two Trip Detection Logic of EURO-OBD ... 37
EURO-OBD Diagnostic Trouble Code (DTC) ......... 37
Malfunction Indicator (MI) ....................................... 41
CONSULT-II ........................................................... 41
Diagnostic Procedure Without CONSULT-II ........... 50TROUBLE DIAGNOSIS — INTRODUCTION ........... 56
Introduction ............................................................. 56
Work Flow ............................................................... 60
TROUBLE DIAGNOSIS — BASIC INSPECTION .... 63
A/T Fluid Check ...................................................... 63
Stall Test ................................................................. 64
Line Pressure Test .................................................. 67
Road Test ............................................................... 68
TROUBLE DIAGNOSIS — GENERAL DESCRIP-
TION .......................................................................... 86
Symptom Chart ....................................................... 86
TCM Terminals and Reference Value ...................106
CAN COMMUNICATION .........................................109
System Description ...............................................109
CAN Communication Unit .....................................109
DTC P0705 PARK/NEUTRAL POSITION (PNP)
SWITCH ...................................................................111
Description .............................................................111
Wiring Diagram — AT — PNP/SW .......................113
Diagnostic Procedure ...........................................114
Component Inspection ..........................................116
DTC P0710 A/T FLUID TEMPERATURE SENSOR
CIRCUIT ..................................................................117
Description ............................................................117
Wiring Diagram — AT — FTS ..............................119
Diagnostic Procedure ...........................................120
Component Inspection ..........................................122
DTC P0720 VEHICLE SPEED SENSOR A/T (REV-
OLUTION SENSOR) ...............................................123
Description ............................................................123
Wiring Diagram — AT — VSSA/T ........................126
Diagnostic Procedure ...........................................127
DTC P0725 ENGINE SPEED SIGNAL ...................129
Description ............................................................129
Wiring Diagram — AT — ENGSS .........................130
Diagnostic Procedure ..........................................
.131
DTC P0731 A/T 1ST GEAR FUNCTION ................133
Description ............................................................133
Wiring Diagram — AT — 1ST ...............................136

AT-2
Diagnostic Procedure ...........................................137
Component Inspection ..........................................138
DTC P0732 A/T 2ND GEAR FUNCTION ................139
Description ............................................................139
Wiring Diagram — AT — 2ND ..............................142
Diagnostic Procedure ...........................................143
Component Inspection ..........................................144
DTC P0733 A/T 3RD GEAR FUNCTION ................145
Description ............................................................145
Wiring Diagram — AT — 3RD ..............................148
Diagnostic Procedure ...........................................149
Component Inspection ..........................................150
DTC P0734 A/T 4TH GEAR FUNCTION ................151
Description ............................................................151
Wiring Diagram — AT — 4TH ...............................154
Diagnostic Procedure ...........................................155
Component Inspection ..........................................158
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE .................................................159
Description ............................................................159
Wiring Diagram — AT — TCV ..............................161
Diagnostic Procedure ...........................................162
Component Inspection ..........................................163
DTC P0745 LINE PRESSURE SOLENOID VALVE .164
Description ............................................................164
Wiring Diagram — AT — LPSV ............................166
Diagnostic Procedure ...........................................167
Component Inspection ..........................................169
DTC P0750 SHIFT SOLENOID VALVE A ...............171
Description ............................................................171
Wiring Diagram — AT — SSV/A ...........................173
Diagnostic Procedure ...........................................174
Component Inspection ..........................................175
DTC P0755 SHIFT SOLENOID VALVE B ...............176
Description ............................................................176
Wiring Diagram — AT — SSV/B ...........................178
Diagnostic Procedure ...........................................179
Component Inspection ..........................................179
DTC P1705 ACCELERATOR PEDAL POSITION
(APP) SENSOR .......................................................181
Description ............................................................181
Wiring Diagram — AT — TPS ..............................184
Diagnostic Procedure ...........................................185
DTC P1760 OVERRUN CLUTCH SOLENOID
VALVE .....................................................................187
Description ............................................................187
Wiring Diagram — AT — OVRCSV ......................189
Diagnostic Procedure ...........................................190
Component Inspection ..........................................191
DTC U1000 CAN COMMUNICATION LINE ............192
Description ............................................................192
On Board Diagnosis Logic ....................................192
DTC Confirmation Procedure ...............................192
Wiring Diagram — AT ...........................................193
Diagnostic Procedure ...........................................194
DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP
SENSOR CIRCUIT AND TCM POWER SOURCE) .195
Description ............................................................195
Wiring Diagram — AT — BA/FTS .........................197Diagnostic Procedure ............................................198
Component Inspection ..........................................200
DTC VEHICLE SPEED SENSOR MTR ...................201
Description ............................................................201
Wiring Diagram — AT — VSSMTR .......................203
Diagnostic Procedure ............................................204
DTC CONTROL UNIT (RAM), CONTROL UNIT
(ROM) ......................................................................205
Description ............................................................205
Diagnostic Procedure ............................................206
DTC CONTROL UNIT (EEP ROM) .........................207
Description ............................................................207
Diagnostic Procedure ............................................208
TROUBLE DIAGNOSES FOR SYMPTOMS ...........209
Wiring Diagram — AT — NONDTC ......................209
1. O/D OFF Indicator Lamp Does Not Come On ..211
2. Engine Cannot Be Started In “P” and “N” Position .212
3. In “P” Position, Vehicle Moves Forward Or Back-
ward When Pushed ...............................................213
4. In “N” Position, Vehicle Moves ..........................214
5. Large Shock. “N” → “R” Position ......................215
6. Vehicle Does Not Creep Backward In “R” Position .216
7. Vehicle Does Not Creep Forward In “D”, “2” Or
“1” Position ............................................................219
8. Vehicle Cannot Be Started From D
1 .................221
9. A/T Does Not Shift: D
1→ D2 Or Does Not Kick-
down: D
4→ D2 .....................................................223
10. A/T Does Not Shift: D
2→ D3 ..........................225
11. A/T Does Not Shift: D
3→ D4 ...........................227
12. A/T Does Not Perform Lock-up .......................230
13. A/T Does Not Hold Lock-up Condition ............231
14. Lock-up Is Not Released .................................232
15. Engine Speed Does Not Return To Idle (Light
Braking D
4→ D3 ) .................................................233
16. Vehicle Does Not Start From D
1 .....................234
17. A/T Does Not Shift: D
4→ D3 , W h e n O v e r d r i v e
Control Switch “ON” → “OFF” ...............................235
18. A/T Does Not Shift: D
3→ 22 , When Selector
Lever “D” → “2” Position .......................................235
19. A/T Does Not Shift: 2
2→ 11 , When Selector
Lever “2” → “1” Position ........................................236
20. Vehicle Does Not Decelerate By Engine Brake .237
21. TCM Self-diagnosis Does Not Activate (PNP &
Overdrive Control Switches, and Throttle Position
Sensor Circuit Checks) .........................................237
EXC.F/EURO-OBD
ON BOARD DIAGNOSTIC SYSTEM DESCRIP-
TION ........................................................................244
CONSULT-II ..........................................................244
Diagnostic Procedure Without CONSULT-II .........250
TROUBLE DIAGNOSIS — INTRODUCTION .........255
Introduction ...........................................................255
Work Flow .............................................................259
TROUBLE DIAGNOSIS — BASIC INSPECTION ...261
A/T Fluid Check ....................................................261
Stall Test ................................................................262

AT-3
D
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F
G
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MA
B
AT Line Pressure Test ............................................... 265
Road Test ............................................................. 266
TROUBLE DIAGNOSIS — GENERAL DESCRIP-
TION ........................................................................ 283
Symptom Chart .................................................... 283
TCM Terminals and Reference Value ................... 302
CAN COMMUNICATION ........................................ 305
System Description .............................................. 305
CAN Communication Unit .................................... 305
TROUBLE DIAGNOSES FOR SYMPTOMS .......... 307
Wiring Diagram — AT — NONDTC ...................... 307
1. O/D OFF Indicator Lamp Does Not Come On . 309
2. Engine Cannot Be Started In “P” and “N” Position . 309
3. In “P” Position, Vehicle Moves Forward Or Back-
ward When Pushed .............................................. 310
4. In “N” Position, Vehicle Moves .......................... 311
5. Large Shock. “N” → “R” Position ...................... 312
6. Vehicle Does Not Creep Backward In “R” Position . 313
7. Vehicle Does Not Creep Forward In “D”, “2” Or
“1” Position ........................................................... 316
8. Vehicle Cannot Be Started From D
1 ................. 317
9. A/T Does Not Shift: D
1→ D2 Or Does Not Kick
down: D
4→ D2 ..................................................... 320
10. A/T Does Not Shift: D
2→ D3 ......................... 322
11. A/T Does Not Shift: D
3→ D4 .......................... 324
12. A/T Does Not Perform Lock-up ...................... 326
13. A/T Does Not Hold Lock-up Condition ........... 326
14. Lock-up Is Not Released ................................ 328
15. Engine Speed Does Not Return To Idle (Light
Braking D
4→ D3 ) ................................................ 328
16. Vehicle Does Not Start From D
1 ..................... 330
17. A/T Does Not Shift: D
4→ D3 , When Overdrive
Control Switch “ON” → “OFF” .............................. 330
18. A/T Does Not Shift: D
3→ 22 , When Selector
Lever “D” → “2” Position ...................................... 331
19. A/T Does Not Shift: 2
2→ 11 , When Selector
Lever “2” → “1” Position ....................................... 332
20. Vehicle Does Not Decelerate By Engine Brake . 333
21. TCM Self-diagnosis Does Not Activate (PNP &
Overdrive Control Switches, and Throttle Position
Sensor Circuit Checks) ........................................ 333
ALL
MAIN POWER SUPPLY AND GROUND CIRCUIT . 340
Wiring Diagram — AT — MAIN ............................ 340
Diagnostic Procedure ........................................... 341
VEHICLE SPEED SENSOR - A/T (REVOLUTION
SENSOR) ................................................................ 343
Description ........................................................... 343
Wiring Diagram — AT — VSSAT ......................... 345
Diagnostic Procedure ........................................... 346
DTC VEHICLE SPEED SENSOR MTR .................. 348
Description ........................................................... 348
Wiring Diagram — AT — VSSMTR ...................... 350
Diagnostic Procedure ........................................... 351
ACCELE RATOR PEDAL POSITION (APP) SEN-
SOR ........................................................................ 352
Description ........................................................... 352Wiring Diagram — AT — TPS ..............................354
Diagnostic Procedure ...........................................355
SHIFT SOLENOID VALVE A ..................................357
Description ............................................................357
Wiring Diagram — AT — SSV/A ...........................359
Diagnostic Procedure ...........................................360
Component Inspection ..........................................360
SHIFT SOLENOID VALVE B ..................................362
Description ............................................................362
Wiring Diagram — AT — SSV/B ...........................364
Diagnostic Procedure ...........................................365
Component Inspection ..........................................365
OVERRUN CLUTCH SOLENOID VALVE ...............367
Description ............................................................367
Wiring Diagram — AT — OVRCSV ......................369
Diagnostic Procedure ...........................................370
Component Inspection ..........................................371
TORQUE CONVERTER CLUTCH SOLENOID
VALVE .....................................................................372
Description ............................................................372
Wiring Diagram — AT — TCV ..............................374
Diagnostic Procedure ...........................................375
Component Inspection ..........................................375
BATT/FLUID TEMP SEN (A/T FLUID TEMP SEN-
SOR CIRCUIT AND TCM POWER SOURCE) .......377
Description ............................................................377
Wiring Diagram — AT — BA/FTS .........................379
Diagnostic Procedure ...........................................380
Component Inspection ..........................................382
ENGINE SPEED SIGNAL .......................................383
Description ............................................................383
Wiring Diagram — AT — ENGSS .........................385
Diagnostic Procedure ...........................................386
LINE PRESSURE SOLENOID VALVE ...................388
Description ............................................................388
Wiring Diagram — AT — LPSV ............................390
Diagnostic Procedure ...........................................391
Component Inspection ..........................................393
CAN COMMUNICATION LINE ...............................395
Description ............................................................395
On Board Diagnosis Logic ....................................395
Self-Diagnosis Code Confirmation Procedure ......395
Wiring Diagram — AT — CAN ..............................396
Diagnostic Procedure ...........................................397
A/T SHIFT LOCK SYSTEM ....................................398
Description ............................................................398
Shift Lock System Electrical Parts Location .........398
Wiring Diagram — SHIFT — ................................399
Diagnostic Procedure ...........................................400
KEY INTERLOCK CABLE ......................................404
Components .........................................................404
Removal ...............................................................404
Installation ............................................................405
ON-VEHICLE SERVICE ..........................................406
Control Valve Assembly and Accumulators ..........406
Control Cable Adjustment .....................................408
Park/Neutral Position (PNP) Switch Adjustment ..408
Differential Side Oil Seal Replacement ................409
Revolution Sensor Replacement ..........................409

OVERALL SYSTEM
AT-19
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AT
●*1: Operates when overdrive control switch is set in “OFF” position.
●*2: Oil pressure is applied to both 2nd “apply” side and 3rd “release” side of band servo piston. However, brake band does not con-
tract because oil pressure area on the “release” side is greater than that on the “apply” side.
●*3: Oil pressure is applied to 4th “apply” side in condition *2 above, and brake band contracts.
●*4: A/T will not shift to 4th when overdrive control switch is set in “OFF” position.
●*5: Operates when overdrive control switch is “OFF”.
●: Operates.
●A: Operates when throttle opening is less than 3/16, activating engine brake.
●B: Operates during “progressive” acceleration.
●C: Operates but does not affect power transmission.
●D: Operates when throttle opening is less than 3/16, but does not affect engine brake. D*41st *1D B B
Automatic
shift
1⇔ 2 ⇔ 3
⇔ 4 2nd *1A B
3rd *1A *2C C B
*5
4th C *3C C
21st D B BAutomatic
shift
1⇔ 2 2nd A B
11stBLocks (held
stationary) in
1st speed
1⇐ 2 2ndB Shift posi-
tionReverse
clutch
5High
clutch
6For-
ward
clutch
15Over-
run
clutch
17Band servo
Forward
one-way
clutch
16Low
one-
way
clutch
18Low &
revers
e brake
19Lock-
upRemarks
2nd
apply3rd
release4th
apply

AT-22
OVERALL SYSTEM
“D1 ” and “21 ” Positions
●Forward one-way clutch
●Forward clutch
●Low one-way clutchRear internal gear is locked to rotate counterclockwise because of the functioning of
these three clutches.
Overrun clutch
engagement conditions
(Engine brake)D
1 : Overdrive control switch “OFF” and throttle opening is less than 3/16
2
1 : Operates when throttle opening is less than 3/16, but does not affect engine brake.
At D
1 and 21 positions, engine brake is not activated due to free turning of low one-
way clutch.
SAT377J

OVERALL SYSTEM
AT-23
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AT
“D2 ”, “22 ” and “12 ” Positions
●Forward clutch
●Forward one-way
clutch
●Brake bandRear sun gear drives rear planetary carrier and combined front internal gear. Front internal gear now
rotates around front sun gear accompanying front planetary carrier.
As front planetary carrier transfers the power to rear internal gear through forward clutch and forward one-
way clutch, this rotation of rear internal gear increases the speed of rear planetary carrier compared with
that of the 1st speed.
Overrun clutch
engagement conditionsD
2 : Overdrive control switch “OFF” and throttle opening is less than 3/16
2
2: Operates when throttle opening is less than 3/16, but does not affect engine brake.
1
2 : Always engaged
SAT378J

OVERALL SYSTEM
AT-27
D
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AT
Control SystemECS007NJ
OUTLINE
The automatic transaxle senses vehicle operating conditions through various switches and sensors. It always
controls the optimum shift position and reduces shifting and lock-up shocks.
*: This sensor means Accelerator pedal position (APP) sensor.
CONTROL SYSTEM
SWITCHES & SENSORS TCM ACTUATORS
PNP switch
Throttle position sensor*
Engine speed signal
A/T fluid temperature sensor
Revolution sensor
Vehicle speed sensor
Overdrive control switch
Stop lamp switchShift control
Line pressure control
Lock-up control
Overrun clutch control
Timing control
Fail-safe control
Self-diagnosis
CONSULT-II communication line
controlShift solenoid valve A
Shift solenoid valve B
Overrun clutch solenoid valve
Torque converter clutch solenoid
valve
Line pressure solenoid valve
O/D OFF indicator lamp
SCIA0690E