check engine NISSAN X-TRAIL 2003 Electronic Repair Manual

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 .......................................11
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 ...................................................... 16
Cross-sectional View .............................................. 17
Hydraulic Control Circuit ........................................ 18
Shift Mechanism ..................................................... 19
Control System ....................................................... 27
Control Mechanism ................................................ 29
Control Valve .......................................................... 33
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 lamp (MIL) ............................ 41
CONSULT-II ........................................................... 41
Diagnostic Procedure Without CONSULT-II ........... 50TROUBLE DIAGNOSIS — INTRODUCTION ........... 56
Introduction ............................................................. 56
Work Flow ............................................................... 61
TROUBLE DIAGNOSIS — BASIC INSPECTION .... 64
A/T Fluid Check ...................................................... 64
Stall Test ................................................................. 65
Line Pressure Test .................................................. 68
Road Test ............................................................... 69
TROUBLE DIAGNOSIS — GENERAL DESCRIP-
TION .......................................................................... 86
Symptom Chart ....................................................... 86
TCM Terminals and Reference Value ...................125
CAN COMMUNICATION .........................................129
System Description ...............................................129
DTC P0705 PARK/NEUTRAL POSITION (PNP)
SWITCH ..................................................................130
Description ............................................................130
Wiring Diagram — AT — PNP/SW .......................132
Diagnostic Procedure ...........................................133
Component Inspection ..........................................135
DTC P0710 A/T FLUID TEMPERATURE SENSOR
CIRCUIT ..................................................................136
Description ............................................................136
Wiring Diagram — AT — FTS ..............................138
Diagnostic Procedure ...........................................139
Component Inspection ..........................................141
DTC P0720 VEHICLE SPEED SENSOR·A/T (REV-
OLUTION SENSOR) ...............................................142
Description ............................................................142
Wiring Diagram — AT — VSSA/T ........................144
Diagnostic Procedure ...........................................145
DTC P0725 ENGINESPEED SIGNAL ...................147
Description ............................................................147
Wiring Diagram — AT — ENGSS .........................148
Diagnostic Procedure ...........................................149
DTC P0731 A/T 1ST GEAR FUNCTION ................151
Description ............................................................151
Wiring Diagram — AT — 1ST ...............................154
Diagnostic Procedure ...........................................155
Component Inspection ..........................................156

AT-2
DTC P0732 A/T 2ND GEAR FUNCTION ................158
Description ............................................................158
Wiring Diagram — AT — 2ND ..............................161
Diagnostic Procedure ...........................................162
Component Inspection ..........................................163
DTC P0733 A/T 3RD GEAR FUNCTION ................165
Description ............................................................165
Wiring Diagram — AT — 3RD ..............................168
Diagnostic Procedure ...........................................169
Component Inspection ..........................................170
DTC P0734 A/T 4TH GEAR FUNCTION ................172
Description ............................................................172
Wiring Diagram — AT — 4TH ...............................175
Diagnostic Procedure ...........................................176
Component Inspection ..........................................179
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE .................................................181
Description ............................................................181
Wiring Diagram — AT — TCV ..............................183
Diagnostic Procedure ...........................................184
Component Inspection ..........................................185
DTC P0745 LINE PRESSURE SOLENOID VALVE. 186
Description ............................................................186
Wiring Diagram — AT — LPSV ............................188
Diagnostic Procedure ...........................................189
Component Inspection ..........................................191
DTC P0750 SHIFT SOLENOID VALVE A ...............193
Description ............................................................193
Wiring Diagram — AT — SSV/A ...........................195
Diagnostic Procedure ...........................................196
Component Inspection ..........................................197
DTC P0755 SHIFT SOLENOID VALVE B ...............198
Description ............................................................198
Wiring Diagram — AT — SSV/B ...........................200
Diagnostic Procedure ...........................................201
Component Inspection ..........................................202
DTC P1705 ACCELERATOR PEDAL POSITION
(APP) SENSOR .......................................................203
Description ............................................................203
Wiring Diagram — AT — TPS ..............................205
Diagnostic Procedure ...........................................206
DTC P1760 OVERRUN CLUTCH SOLENOID
VALVE .....................................................................208
Description ............................................................208
Wiring Diagram — AT — OVRCSV ......................210
Diagnostic Procedure ...........................................211
Component Inspection ..........................................212
DTC U1000 CAN COMMUNICATION LINE ............213
Description ............................................................213
On Board Diagnosis Logic ....................................213
..............................................................................213
Wiring Diagram — AT ...........................................214
Diagnostic Procedure ...........................................215
DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP
SENSOR CIRCUIT AND TCM POWER SOURCE). 216
Description ............................................................216
Wiring Diagram — AT — BA/FTS .........................218Diagnostic Procedure ............................................ 219
Component Inspection .......................................... 221
DTC VEHICLE SPEED SENSOR MTR ................... 222
Description ............................................................ 222
Wiring Diagram — AT — VSSMTR ....................... 224
Diagnostic Procedure ............................................ 225
DTC CONTROL UNIT (RAM), CONTROL UNIT
(ROM) ...................................................................... 226
Description ............................................................ 226
Diagnostic Procedure ............................................ 227
DTC CONTROL UNIT(EEPROM) ........................... 228
Description ............................................................ 228
Diagnostic Procedure ............................................ 229
TROUBLE DIAGNOSES FOR SYMPTOMS ........... 230
.............................................................................. 230
1. O/D OFF Indicator Lamp Does Not Come On .. 232
2. Engine Cannot Be Started In “P” and “N” Position. 233
3. In “P” Position, Vehicle Moves Forward Or Back-
ward When Pushed ............................................... 234
4. In “N” Position, Vehicle Moves .......................... 234
5. Large Shock. “N”®“R” Position ...................... 236
6. Vehicle Does Not Creep Backward In “R” Position. 237
7. Vehicle Does Not Creep Forward In “D”, “2” Or
“1” Position ............................................................ 240
8. Vehicle Cannot Be Started From D
1................. 242
9. A/T Does Not Shift: D
1®D2Or Does Not Kick-
down: D
4®D2..................................................... 244
10. A/T Does Not Shift: D
2®D3.......................... 246
11.A/TDoesNotShift:D
3®D4........................... 249
12. A/T Does Not Perform Lock-up ....................... 252
13. A/T Does Not Hold Lock-up Condition ............ 253
14. Lock-up Is Not Released ................................. 254
15. Engine Speed Does Not Return To Idle (Light
Braking D
4®D3) ................................................. 255
16. Vehicle Does Not Start From D
1..................... 257
17. A/T Does Not Shift: D
4®D3, When Overdrive
Control Switch “ON”®“OFF” ............................... 258
18. A/T Does Not Shift: D
3®22, When Selector
Lever “D”®“2” Position ....................................... 258
19. A/T Does Not Shift: 2
2®11, When Selector
Lever “2”®“1” Position ........................................ 259
20. Vehicle Does Not Decelerate By Engine Brake. 259
21. TCM Self-diagnosis Does Not Activate (PNP &
Overdrive Control Switches, and Throttle Position
Sensor Circuit Checks) ......................................... 260
EXC.F/EURO-OBD
ON BOARD DIAGNOSTIC SYSTEM DESCRIP-
TION ........................................................................ 267
CONSULT-II .......................................................... 267
Diagnostic Procedure Without CONSULT-II ......... 273
TROUBLE DIAGNOSIS — INTRODUCTION ......... 279
Introduction ........................................................... 279
Work Flow ............................................................. 284
TROUBLE DIAGNOSIS — BASIC INSPECTION ... 286
A/T Fluid Check .................................................... 286
Stall Test ................................................................ 287

AT-3
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AT Line Pressure Test ............................................... 290
Road Test ............................................................. 291
TROUBLE DIAGNOSIS — GENERAL DESCRIP-
TION ........................................................................ 308
Symptom Chart .................................................... 308
TCM Terminals and Reference Value ................... 347
CAN COMMUNICATION ........................................ 351
System Description .............................................. 351
TROUBLE DIAGNOSES FOR SYMPTOMS .......... 352
............................................................................. 352
1. O/D OFF Indicator Lamp Does Not Come On . 354
2. Engine Cannot Be Started In “P” and “N” Position. 355
3. In “P” Position, Vehicle Moves Forward Or Back-
ward When Pushed .............................................. 356
4. In “N” Position, Vehicle Moves ......................... 356
5. Large Shock. “N”®“R” Position ...................... 358
6. Vehicle Does Not Creep Backward In “R” Position. 359
7. Vehicle Does Not Creep Forward In “D”, “2” Or
“1” Position ........................................................... 362
8. Vehicle Cannot Be Started From D
1................. 364
9. A/T Does Not Shift: D
1®D2Or Does Not Kick-
down: D
4®D2..................................................... 366
10. A/T Does Not Shift: D
2®D3......................... 368
11.A/TDoesNotShift:D
3®D4.......................... 371
12. A/T Does Not Perform Lock-up ...................... 374
13. A/T Does Not Hold Lock-up Condition ........... 375
14. Lock-up Is Not Released ................................ 376
15. Engine Speed Does Not Return To Idle (Light
Braking D
4®D3) ................................................ 377
16. Vehicle Does Not Start From D
1..................... 379
17. A/T Does Not Shift: D
4®D3, When Overdrive
Control Switch “ON”®“OFF” .............................. 380
18. A/T Does Not Shift: D
3®22, When Selector
Lever “D”®“2” Position ...................................... 380
19. A/T Does Not Shift: 2
2®11, When Selector
Lever “2”®“1” Position ....................................... 381
20. Vehicle Does Not Decelerate By Engine Brake. 381
21. TCM Self-diagnosis Does Not Activate (PNP &
Overdrive Control Switches, and Throttle Position
Sensor Circuit Checks) ........................................ 382
ALL
MAIN POWER SUPPLY AND GROUND CIRCUIT. 389
Wiring Diagram — AT — MAIN ............................ 389
Diagnostic Procedure ........................................... 390
VEHICLE SPEED SENSOR·A/T (REVOLUTION
SENSOR) ................................................................ 392
Description ........................................................... 392
Wiring Diagram — AT — VSSA/T ........................ 394
Diagnostic Procedure ........................................... 395
DTC VEHICLE SPEED SENSOR MTR .................. 397
Description ........................................................... 397
Wiring Diagram — AT — VSSMTR ...................... 399
Diagnostic Procedure ........................................... 400
ACCELE RATOR PEDAL POSITION (APP) SEN-
SOR ........................................................................ 401
Description ........................................................... 401Wiring Diagram — AT — TPS ..............................403
Diagnostic Procedure ...........................................404
SHIFT SOLENOID VALVE A ..................................406
Description ............................................................406
Wiring Diagram — AT — SSV/A ...........................408
Diagnostic Procedure ...........................................409
Component Inspection ..........................................410
SHIFT SOLENOID VALVE B ..................................411
Description ............................................................411
Wiring Diagram — AT — SSV/B ...........................413
Diagnostic Procedure ...........................................414
Component Inspection ..........................................415
OVERRUN CLUTCH SOLENOID VALVE ...............416
Description ............................................................416
Wiring Diagram — AT — OVRCSV ......................418
Diagnostic Procedure ...........................................419
Component Inspection ..........................................420
TORQUE CONVERTER CLUTCH SOLENOID
VALVE .....................................................................421
Description ............................................................421
Wiring Diagram — AT — TCV ..............................423
Diagnostic Procedure ...........................................424
Component Inspection ..........................................425
BATT/FLUID TEMP SEN (A/T FLUID TEMP SEN-
SOR CIRCUIT AND TCM POWER SOURCE) .......426
Description ............................................................426
Wiring Diagram — AT — BA/FTS .........................428
Diagnostic Procedure ...........................................429
Component Inspection ..........................................431
ENGINE SPEED SIGNAL .......................................432
Description ............................................................432
Wiring Diagram — AT — ENGSS .........................433
Diagnostic Procedure ...........................................434
LINE PRESSURE SOLENOID VALVE ...................436
Description ............................................................436
Wiring Diagram — AT — LPSV ............................438
Diagnostic Procedure ...........................................439
Component Inspection ..........................................441
CAN CAMMUNICATION LINE ................................443
Description ............................................................443
On Board Diagnosis Logic ....................................443
Self-Diagnosis Code Confirmation Procedure ......443
Wiring Diagram — AT — CAN ..............................444
Diagnostic Procedure ...........................................445
A/T SHIFT LOCK SYSTEM ....................................446
Description ............................................................446
Shift Lock System Electrical Parts Location .........446
Wiring Diagram — SHIFT — ................................447
Diagnostic Procedure ...........................................448
KEY INTERLOCK CABLE ......................................452
Components .........................................................452
Removal ...............................................................452
Installation ............................................................453
ON-VEHICLE SERVICE ..........................................454
Control Valve Assembly and Accumulators ..........454
Control Cable Adjustment .....................................456
Park/Neutral Position (PNP) Switch Adjustment ..456

A/T FLUID
AT-13
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AT
A/T FLUIDPFP:KLE40
Checking A/T FluidECS004Q7
1. Warm up engine.
2. Check for fluid leakage.
3. Before driving, fluid level can be checked at fluid temperatures
of 30 to 50°C (86 to 122°F) using “COLD” range on dipstick.
a. Park vehicle on level surface and set parking brake.
b. Start engine and move selector lever through each gear posi-
tion. Leave selector lever in “P” position.
c. Check fluid level with engine idling.
d. Remove dipstick and note reading. If level is at low side of either
range, and fluid to the charging pipe.
e. Re-insert dipstick into charging pipe as far as it will go.
f. Remove dipstick and note reading. If reading is at low side of range, add fluid to the charging pipe.
Do not overfill.
4. Drive vehicle for approximately 5 minutes in urban areas.
5. Re-check fluid level at fluid temperatures of 50 to 80°C (122 to 176°F) using “HOT” range on dipstick.
6. Check fluid condition.
lIf fluid is very dark or smells burned, refer to AT section for
checking operation of A/T. Flush cooling system after repair of
A/T.
lIf A/T fluid contains frictional material (clutches, bands, etc.),
replace radiator and flush cooler line using cleaning solvent
and compressed air after repair of A/T. Refer toCO-12,
"RADIATOR",CO-15, "RADIATOR (ALUMINUM TYPE)",,.
Changing A/T FluidECS004Q8
1. Warm up A/T fluid.
2. Stop engine.
3. Drain A/T fluid from drain plug and refill with new A/T fluid.
Always refill same volume with drained fluid.
4. Run engine at idle speed for five minutes.
5. Check fluid level and condition. Refer to “Checking A/T Fluid”. If fluid is still dirty, repeat steps 2 through 5.
SMA827CA
SMA853B
Fluid grade:
Genuine Nissan ATF or equivalent. Refer toMA-
17, "RECOMMENDED FLUIDS AND LUBRI-
CANTS".
Fluid capacity (With torque converter):
Approx. 8.0 (7.01 lmp qt)
Drain plug:
:29-39N·m(3.0-4.0kg-m,22-29ft-lb)
SMA027D

AT-34
OVERALL SYSTEM
Overrun clutch control valve Switches hydraulic circuits to prevent engagement of the overrun clutch simultaneously with appli-
cation of the brake band in D
4. (Interlocking occurs if the overrun clutch engages during D4.)
1st reducing valve Reduces low & reverse brake pressure to dampen engine-brake shock when down-shifting from
the “1” position 1
2to 11.
Overrun clutch reducing valve Reduces oil pressure directed to the overrun clutch and prevents engine-brake shock.
In “1” and “2” positions, line pressure acts on the overrun clutch reducing valve to increase the
pressure-regulating point, with resultant engine brake capability.
Torque converter relief valve Prevents an excessive rise in torque converter pressure.
Torque converter clutch control
valve, plug and sleeveActivates or inactivates the lock-up function.
Also provides smooth lock-up through transient application and release of the lock-up system.
1-2 accumulator valve and piston Dampens the shock encountered when 2nd gear band servo contracts, and provides smooth
shifting.
3-2 timing valve Switches oil pressure with 3-2 timing valve according to throttle opening.
Shuttle control valve Reduces shock when down-shifting from 3rd to 2nd and regulates overrun clutch.
Cooler check valve Regulates oil pressure which causes lock-up when driving at low speeds.Valve name Function

TROUBLE DIAGNOSIS — INDEX
AT-35
[EURO-OBD]
D
E
F
G
H
I
J
K
L
MA
B
AT
[EURO-OBD]TROUBLE DIAGNOSIS — INDEXPFP:00000
Alphabetical & P No. Index for DTCECS003VK
ALPHABETICAL INDEX FOR DTC
Check if the vehicle is a model with Euro-OBD system or not by the “Type approval number” on the identifica-
tion plate. Refer toGI-45, "
IDENTIFICATION PLATE".
l*1: These numbers are prescribed by SAE J2012.
l*2: When the fail-safe operation occurs, the MIL illuminates.
l*3: The MIL illuminates when both the “Revolution sensor signal” and the “Vehicle speed sensor signal” meet the fail-safe condition at
thesametime.Type approval number Model
Available With Euro-OBD system
Not available (blank) Without Euro-OBD system
Items
(CONSULT-II screen terms)DTC
Reference page
CONSULT-II
GST*1
A/T 1ST GR FNCTN P0731AT- 1 5 1 , "
DTC P0731 A/T 1ST
GEAR FUNCTION"
A/T 2ND GR FNCTN P0732AT- 1 5 8 , "DTC P0732 A/T 2ND
GEAR FUNCTION"
A/T 3RD GR FNCTN P0733AT- 1 6 5 , "DTC P0733 A/T 3RD
GEAR FUNCTION"
A/T 4TH GR FNCTN P0734AT- 1 7 2 , "DTC P0734 A/T 4TH
GEAR FUNCTION"
ATF TEMP SEN/CIRC P0710AT- 1 3 6 , "
DTC P0710 A/T FLUID
TEMPERATURE SENSOR
CIRCUIT"
ENGINE SPEED SIG P0725AT- 1 4 7 , "DTC P0725 ENGINE
SPEED SIGNAL"
L/PRESS SOL/CIRC P0745AT-186, "
DTC P0745 LINE
PRESSURE SOLENOID
VA LV E"
O/R CLTCH SOL/CIRC P1760AT- 2 0 8 , "
DTC P1760 OVER-
RUN CLUTCH SOLENOID
VA LV E"
PNP SW/CIRC P0705AT-1 3 0 , "
DTC P0705 PARK/
NEUTRAL POSITION (PNP)
SWITCH"
SFT SOL A/CIRC*2 P0750AT- 1 9 3 , "DTC P0750 SHIFT
SOLENOID VALVE A"
SFT SOL B/CIRC*2 P0755AT- 1 9 8 , "DTC P0755 SHIFT
SOLENOID VALVE B"
TCC SOLENOID/CIRC P0740AT-181, "
DTC P0740 TORQUE
CONVERTER CLUTCH SOLE-
NOID VALVE"
TP SEN/CIRC A/T*2 P1705AT- 2 0 3 , "
DTC P1705 ACCEL-
ERATOR PEDAL POSITION
(APP) SENSOR"
VEH SPD SEN/CIR AT*3 P0720AT-142, "
DTC P0720 VEHICLE
SPEED SENSOR·A/T (REVO-
LUTION SENSOR)"
CAN COMM CIRCUIT U1000EC-114, "DTC U1000 CAN
COMMUNICATION LINE"

AT-36
[EURO-OBD]
TROUBLE DIAGNOSIS — INDEX
PNO.INDEXFORDTC
Check if the vehicle is a model with Euro-OBD system or not by the “Type approval number” on the identifica-
tion plate. Refer toGI-45, "
IDENTIFICATION PLATE".
l*1: These numbers are prescribed by SAE J2012.
l*2: When the fail-safe operation occurs, the MIL illuminates.
l*3: The MIL illuminates when both the “Revolution sensor signal” and the “Vehicle speed sensor signal” meet the fail-safe condition at
thesametime.Type approval number Model
Available With Euro-OBD system
Not available (blank) Without Euro-OBD system
DTC
Items
(CONSULT-II screen terms)Reference page
CONSULT-II
GST*1
P0705 PNP SW/CIRCAT- 1 3 0 , "
DTC P0705 PARK/
NEUTRAL POSITION (PNP)
SWITCH"
P0710 ATF TEMP SEN/CIRCAT-136, "
DTC P0710 A/T FLUID
TEMPERATURE SENSOR
CIRCUIT"
P0720 VEH SPD SEN/CIR AT*3AT- 1 4 2 , "
DTC P0720 VEHICLE
SPEED SENSOR·A/T (REVO-
LUTION SENSOR)"
P0725 ENGINE SPEED SIGAT- 1 4 7 , "DTC P0725 ENGINE
SPEED SIGNAL"
P0731 A/T 1ST GR FNCTNAT- 1 5 1 , "DTC P0731 A/T 1ST
GEAR FUNCTION"
P0732 A/T 2ND GR FNCTNAT- 1 5 8 , "DTC P0732 A/T 2ND
GEAR FUNCTION"
P0733 A/T 3RD GR FNCTNAT- 1 6 5 , "DTC P0733 A/T 3RD
GEAR FUNCTION"
P0734 A/T 4TH GR FNCTNAT- 1 7 2 , "DTC P0734 A/T 4TH
GEAR FUNCTION"
P0740 TCC SOLENOID/CIRCAT- 1 8 1 , "
DTC P0740 TORQUE
CONVERTER CLUTCH SOLE-
NOID VALVE"
P0745 L/PRESS SOL/CIRCAT-186, "
DTC P0745 LINE
PRESSURE SOLENOID
VA LV E"
P0750 SFT SOL A/CIRC*2AT-193, "DTC P0750 SHIFT
SOLENOID VALVE A"
P0755 SFT SOL B/CIRC*2AT-198, "DTC P0755 SHIFT
SOLENOID VALVE B"
P1705 TP SEN/CIRC A/T*2AT- 2 0 3 , "
DTC P1705 ACCEL-
ERATOR PEDAL POSITION
(APP) SENSOR"
P1760 O/R CLTCH SOL/CIRCAT-208, "
DTC P1760 OVER-
RUNCLUTCHSOLENOID
VA LV E"
U1000 CAN COMM CIRCUITEC-114, "DTC U1000 CAN
COMMUNICATION LINE"

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
AT-41
[EURO-OBD]
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Malfunction Indicator lamp (MIL)ECS004QL
1. The malfunction indicator lamp will light up when the ignition
switch is turned ON without the engine running. This is for
checking the lamp.
lIf the malfunction indicator does not light up, refer to "",
“Warning Lamps”.
(Or see MIL & CONSULT-II in EC section. Refer toEC-48,
"Malfunction Indicator (MI)", “Description”, “Malfunction Indi-
cator lamp (MIL)” and "", “CONSULT-II”.)
2. When the engine is started, the malfunction indicator should go
off.
If the lamp remains on, the on board diagnostic system has
detected an emission-related (EURO-OBD) malfunction. For
detail, refer to "njec0029", “ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION”.
CONSULT-IIECS0 04 QM
After performing “SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)”AT- 4 1 , "SELF-DIAGNOSTIC
PROCEDURE (WITH CONSULT-II)", place check marks for results on the “DIAGNOSTIC WORKSHEET”,
AT- 5 7 , "
DIAGNOSTIC WORKSHEET". Reference pages are provided following the items.
NOTICE:
1. The CONSULT-II electrically displays shift timing and lock-up timing (that is, operation timing of each sole-
noid).
Check for time difference between actual shift timing and the CONSULT-II display. If the difference is
noticeable, mechanical parts (except solenoids, sensors, etc.) may be malfunctioning. Check mechanical
parts using applicable diagnostic procedures.
2. Shift schedule (which implies gear position) displayed on CONSULT-II and that indicated in Service Man-
ual may differ slightly. This occurs because of the following reasons:
–Actual shift schedule has more or less tolerance or allowance,
–Shift schedule indicated in Service Manual refers to the point where shifts start, and
–Gear position displayed on CONSULT-II indicates the point where shifts are completed.
3. Shift solenoid valve “A” or “B” is displayed on CONSULT-II at the start of shifting. Gear position is dis-
played upon completion of shifting (which is computed by TCM).
4. Additional CONSULT-II information can be found in the Operation Manual supplied with the CONSULT-II
unit.
SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)
1. Turn on CONSULT-II and touch “ENGINE” for EURO-OBD
detected items or touch “A/T” for TCM self-diagnosis.
If A/T is not displayed, check TCM power supply and ground cir-
cuit. Refer toAT - 1 2 5 , "
TCM Terminals and Reference Value".If
result is NG, refer toPG-2, "
POWER SUPPLY ROUTING".
SAT652J
SAT014K

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
AT-51
[EURO-OBD]
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TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)
1.CHECK O/D OFF INDICATOR LAMP
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch to “OFF” position.
Wait 5 seconds.
3. Turn ignition switch to “ACC” position.
4. Set overdrive control switch to “ON” position.
5. Move selector lever to “P” position.
6. Turn ignition switch to “ON” position. (Do not start engine.)
7. Does O/D OFF indicator lamp come on for about 2 seconds?
Ye s o r N o
Yes >>GOTO2
No >> Go toAT- 2 3 2 , "
1. O/D OFF Indicator Lamp Does Not Come On".
2.JUDGEMENT PROCEDURE STEP 1
1. Turn ignition switch to “OFF” position.
2. Turn ignition switch to “ACC” position.
3. Move selector lever to “D” position.
4. Set overdrive control switch to “OFF” position.
5. Turn ignition switch to “ON” position. (Do not start engine.)
–Wait more than 2 seconds after turning ignition switch “ON”.
>> GO TO 3
SAT774B
SCIA0693E
SAT653E

AT-56
[EURO-OBD]
TROUBLE DIAGNOSIS — INTRODUCTION
TROUBLE DIAGNOSIS — INTRODUCTION
PFP:00000
IntroductionECS0 04 QO
The TCM receives a signal from the vehicle speed sensor, throttle
position sensor or PNP switch and provides shift control or lock-up
control via A/T solenoid valves.
The TCM also communicates with the ECM by means of a signal
sent from sensing elements used with the EURO-OBD related parts
of the A/T system for malfunction-diagnostic purposes. The TCM is
capable of diagnosing malfunctioning parts while the ECM can store
malfunctions in its memory.
Input and output signals must always be correct and stable in the
operation of the A/T system. The A/T system must be in good oper-
ating condition and be free of valve seizure, solenoid valve malfunc-
tion, etc.
It is much more difficult to diagnose a problem that occurs intermit-
tently rather than continuously. Most intermittent problems are
caused by poor electric connections or improper wiring. In this case,
careful checking of suspected circuits may help prevent the replace-
ment of good parts.
A visual check only, may not find the cause of the problems. A road
test with CONSULT-II (or GST) or a circuit tester connected should
be performed. Follow the “Work Flow”. Refer toAT- 6 1 , "
Work Flow".
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such problems, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A “Diagnostic Worksheet” like the exam-
ple (AT-57, "
DIAGNOSTIC WORKSHEET") should be used.
Start your diagnosis by looking for “conventional” problems first. This
will help troubleshoot driveability problems on an electronically con-
trolled engine vehicle.
Also check related Service bulletins for information.
SAT631IA
SAT632I
SEF234G