2003 NISSAN ALMERA N16 torque

AT-32
OVERALL SYSTEM
OVERRUN CLUTCH CONTROL (ENGINE BRAKE CONTROL)
Forward one-way clutch is used to reduce shifting shocks in downshifting operations. This clutch transmits
engine torque to the wheels. However, drive force from the wheels is not transmitted to the engine because
the one-way clutch rotates idle. This means the engine brake is not effective.
The overrun clutch operates when the engine brake is needed.
Overrun Clutch Operating Conditions
Overrun Clutch Solenoid Valve Control
The overrun clutch solenoid valve is operated by an ON-OFF signal
transmitted by the TCM to provide overrun clutch control (engine
brake control).
When this solenoid valve is “ON”, the pilot pressure drain port
closes. When it is “OFF”, the drain port opens.
During the solenoid valve “ON” pilot pressure is applied to the end
face of the overrun clutch control valve.
Selector lever position Gear position Throttle opening
“D” position → move to center D
1 , D2 , D3 gear position
Less than 3/16
“2” position → move to center 2
1 , 22 gear position
“1” position → move to center 1
1 , 12 gear position At any position
SAT014J
SAT015J

AT-34
OVERALL SYSTEM
Control Valve
ECS007NL
FUNCTION OF CONTROL VALVES
Valve name Function
Pressure regulator valve, plug
and sleeveRegulates oil discharged from the oil pump to provide optimum line pressure for all driving condi-
tions.
Pressure modifier valve and
sleeveUsed as a signal supplementary valve to the pressure regulator valve. Regulates pressure-modi-
fier pressure (signal pressure) which controls optimum line pressure for all driving conditions.
Pilot valve Regulates line pressure to maintain a constant pilot pressure level which controls lock-up mecha-
nism, overrun clutch, shift timing.
Accumulator control valve Regulates accumulator back-pressure to pressure suited to driving conditions.
Manual valve Directs line pressure to oil circuits corresponding to select positions.
Hydraulic pressure drains when the shift lever is in Neutral.
Shift valve A Simultaneously switches four oil circuits using output pressure of shift solenoid valve A to meet
driving conditions (vehicle speed, throttle opening, etc.).
Provides automatic downshifting and up-shifting (1st → 2nd → 3rd → 4th gears/4th → 3rd → 2nd
→ 1st gears) in combination with shift valve B.
Shift valve B Simultaneously switches three oil circuits using output pressure of shift solenoid valve B in rela-
tion to driving conditions (vehicle speed, throttle opening, etc.).
Provides automatic downshifting and up-shifting (1st → 2nd → 3rd → 4th gears/4th → 3rd → 2nd
→ 1st gears) in combination with shift valve A.
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
2 to 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 deactivates 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.

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 DTCECS007NM
ALPHABETICAL INDEX FOR DTC
Check if the vehicle is a model with EURO-OBD system or not by the “Type approval number” on the identifi-
cation plate. Refer to GI-41, "IDENTIFICATION PLATE".
●*1: These numbers are prescribed by ISO 15031-5.
●*2: When the fail-safe operation occurs, the MI illuminates.
●*3: The MI illuminates when both the “Revolution sensor signal” and the “Vehicle speed sensor signal” meet the fail-safe condition at
the same time.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-133, "DTC P0731 A/T 1ST
GEAR FUNCTION"
A/T 2ND GR FNCTN P0732AT-139, "DTC P0732 A/T 2ND
GEAR FUNCTION"
A/T 3RD GR FNCTN P0733AT-145, "DTC P0733 A/T 3RD
GEAR FUNCTION"
A/T 4TH GR FNCTN P0734AT-151, "DTC P0734 A/T 4TH
GEAR FUNCTION"
ATF TEMP SEN/CIRC P0710AT- 11 7 , "
DTC P0710 A/T FLUID
TEMPERATURE SENSOR
CIRCUIT"
ENGINE SPEED SIG P0725AT-129, "DTC P0725 ENGINE
SPEED SIGNAL"
L/PRESS SOL/CIRC P0745AT-164, "
DTC P0745 LINE
PRESSURE SOLENOID
VA LV E"
O/R CLTCH SOL/CIRC P1760AT-187, "
DTC P1760 OVER-
RUN CLUTCH SOLENOID
VA LV E"
PNP SW/CIRC P0705AT- 111 , "
DTC P0705 PARK/
NEUTRAL POSITION (PNP)
SWITCH"
SFT SOL A/CIRC*2P0750AT- 1 7 1 , "DTC P0750 SHIFT
SOLENOID VALVE A"
SFT SOL B/CIRC*2P0755AT- 1 7 6 , "DTC P0755 SHIFT
SOLENOID VALVE B"
TCC SOLENOID/CIRC P0740AT-159, "
DTC P0740 TORQUE
CONVERTER CLUTCH SOLE-
NOID VALVE"
TP SEN/CIRC A/T*2P1705AT-181, "
DTC P1705 ACCEL-
ERATOR PEDAL POSITION
(APP) SENSOR"
VEH SPD SEN/CIR AT*3P0720AT- 1 2 3 , "
DTC P0720 VEHICLE
SPEED SENSOR A/T (REVO-
LUTION SENSOR)"
CAN COMM CIRCUIT U1000AT-192, "DTC U1000 CAN
COMMUNICATION LINE"

AT-36
[EURO-OBD]
TROUBLE DIAGNOSIS — INDEX
P NO. INDEX FOR DTC
Check if the vehicle is a model with EURO-OBD system or not by the “Type approval number” on the identifi-
cation plate. Refer to GI-41, "IDENTIFICATION PLATE".
●*1: These numbers are prescribed by ISO 15031-5.
●*2: When the fail-safe operation occurs, the MI illuminates.
●*3: The MI illuminates when both the “Revolution sensor signal” and the “Vehicle speed sensor signal” meet the fail-safe condition at
the same time.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- 111 , "
DTC P0705 PARK/
NEUTRAL POSITION (PNP)
SWITCH"
P0710 ATF TEMP SEN/CIRCAT- 11 7 , "
DTC P0710 A/T FLUID
TEMPERATURE SENSOR
CIRCUIT"
P0720
VEH SPD SEN/CIR AT*3AT-123, "DTC P0720 VEHICLE
SPEED SENSOR A/T (REVO-
LUTION SENSOR)"
P0725 ENGINE SPEED SIGAT-129, "DTC P0725 ENGINE
SPEED SIGNAL"
P0731 A/T 1ST GR FNCTNAT- 1 3 3 , "DTC P0731 A/T 1ST
GEAR FUNCTION"
P0732 A/T 2ND GR FNCTNAT-139, "DTC P0732 A/T 2ND
GEAR FUNCTION"
P0733 A/T 3RD GR FNCTNAT-145, "DTC P0733 A/T 3RD
GEAR FUNCTION"
P0734 A/T 4TH GR FNCTNAT-151, "DTC P0734 A/T 4TH
GEAR FUNCTION"
P0740 TCC SOLENOID/CIRCAT-159, "
DTC P0740 TORQUE
CONVERTER CLUTCH SOLE-
NOID VALVE"
P0745 L/PRESS SOL/CIRCAT- 1 6 4 , "
DTC P0745 LINE
PRESSURE SOLENOID
VA LV E"
P0750
SFT SOL A/CIRC*2AT-171, "DTC P0750 SHIFT
SOLENOID VALVE A"
P0755
SFT SOL B/CIRC*2AT-176, "DTC P0755 SHIFT
SOLENOID VALVE B"
P1705
TP SEN/CIRC A/T*2AT- 1 8 1 , "DTC P1705 ACCEL-
ERATOR PEDAL POSITION
(APP) SENSOR"
P1760 O/R CLTCH SOL/CIRCAT-187, "
DTC P1760 OVER-
RUN CLUTCH SOLENOID
VA LV E"
U1000 CAN COMM CIRCUITAT- 1 9 2 , "DTC U1000 CAN
COMMUNICATION LINE"

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
AT-45
[EURO-OBD]
D
E
F
G
H
I
J
K
L
MA
B
AT
Vehicle speed VEHICLE
SPEED
[km/h] or [mph]—— X●Vehicle speed data,
used for computation
by TCM, is displayed.
Torque converter
slip ratioTC SLIP
RATIO
[0.000]———
●Ratio of engine revolu-
tion to input shaft revo-
lution of torque
converter
Torque converter
slip speedTC SLIP
SPEED
[rpm]———Difference in revolution
between input shaft revo-
lution and input shaft rev-
olution of torque
converterDisplay doesn't indicate
o rpm even if engine is
stopped.
But this isn't malfunc-
tion.
can communica-
tionCAN COMM
[OK/UNKWN]—X—
CAN circuit 1CAN CIRC 1
[OK/UNKWN]—X—
CAN circuit 2CAN CIRC 2
[OK/UNKWN]—X—
CAN circuit 3CAN CIRC 3
[OK/UNKWN]—X—
CAN circuit 4CAN CIRC 4
[OK/UNKWN]—X—
CAN circuit 5CAN CIRC 5
[OK/UNKWN]—X—
Throttle position THROTTLE
POSI
[/8]—— X
●Throttle position data,
used for computation
by TCM, is displayed.●A specific value used
for control is displayed
if fail-safe is activated
due to error.
Stop lamp switch BRAKE SW
[ON/OFF]
X——
●ON/OFF status is dis-
played.
ON... Brake pedal is
depressed.
OFF... Brake pedal is
released.
Line pressure duty LINE PRES DTY
[%]
—— X
●Control value of line
pressure solenoid
valve, computed by
TCM from each input
signal, is displayed.
Torque converter
clutch solenoid
valve dutyTCC S/V DUTY
[%]
—— X
●Control value of torque
converter clutch sole-
noid valve, computed
by TCM from each
input signal, is dis-
played. Item DisplayMover to center Monitor items
Description Remarks TCM
Input
signalsCAN
comm
sig-
nalsMain
signalsSelection
from
menu

AT-54
[EURO-OBD]
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
6th judgement flicker is longer than others.
Overrun clutch solenoid valve circuit is short-circuited or discon-
nected.
 Go to DTC P1760 OVERRUN CLUTCH SOLENOID VALVE.
Refer to AT-1877th judgement flicker is longer than others.
Torque converter clutch solenoid valve circuit is short-circuited or
disconnected.
 Go to DTC P0740 TORQUE CONVERTER CLUTCH SOLE-
NOID VALVE.
Refer to AT- 1 5 9
8th judgement flicker is longer than others.
A/T fluid temperature sensor is disconnected or TCM power
source circuit is damaged.
 Go to DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP SEN-
SOR CIRCUIT AND TCM POWER SOURCE).
Refer to AT- 1 9 59th judgement flicker is longer than others.
Engine speed signal circuit is short-circuited or disconnected.
 Go to DTC P0725 ENGINE SPEED SIGNAL.
Refer to AT- 1 2 9
O/D OFF indicator lamp:
SCIA0700ESCIA0701E
SCIA0702ESCIA0703E

AT-58
[EURO-OBD]
TROUBLE DIAGNOSIS — INTRODUCTION
Diagnostic Worksheet
1.❏ Read the Fail-safe and listen to customer complaints.AT-57, "Infor-
mation from
Customer"
2.❏ CHECK A/T FLUIDAT-63, "A/T
Fluid Check"❏ Leakage (Follow specified procedure)
❏ Fluid condition
❏ Fluid level
3.❏ Perform STALL TEST and LINE PRESSURE TEST.AT-64, "
Stall
Te s t",AT- 6 7 ,
"Line Pres-
sure Test"
❏ Stall test — Mark possible damaged components/others.
❏ Torque converter one-way clutch
❏ Reverse clutch
❏ Forward clutch
❏ Overrun clutch
❏ Forward one-way clutch❏ Low & reverse brake
❏ Low one-way clutch
❏ Engine
❏ Line pressure is low
❏ Clutches and brakes except high clutch and
brake band are OK
❏ Line Pressure test — Suspected parts:
4.❏ Perform all ROAD TEST and mark required procedures.AT-68, "
Road
Te s t"
4-
1.Check before engine is started.AT-70, "1.
CHECK
BEFORE
ENGINE IS
STARTED"
❏ SELF-DIAGNOSTIC PROCEDURE/DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCE-
DURE. — Mark detected items.
❏ PNP switch, AT- 111
.
❏ A/T fluid temperature sensor, AT- 11 7
.
❏ Vehicle speed sensor·A/T (Revolution sensor), AT-123
.
❏ Engine speed signal, AT-129
.
❏ Torque converter clutch solenoid valve, AT- 1 5 9
.
❏ Line pressure solenoid valve, AT-164
.
❏ Shift solenoid valve A, AT-171
.
❏ Shift solenoid valve B, AT-176
.
❏ Accelerator pedal position (APP) sensor, AT-181
.
❏ Overrun clutch solenoid valve, AT-187
.
❏ PNP & overdrive control switches, and throttle position sensor, AT- 2 3 7
.
❏ Batt/fluid temp sen (A/T fluid temperature sensor and TCM power source), AT-195
.
❏ Vehicle speed sensor·MTR, AT- 2 0 1
.
❏ CAN communication line, AT-192
.
❏ Control unit (RAM), control unit (ROM), AT- 2 0 5
.
❏ Control unit (EEP ROM), AT- 2 0 7
.
❏ Battery
❏ Others
4-
2.Check at idleAT-71, "
2.
CHECK AT
IDLE"❏ 1. O/D OFF Indicator Lamp Does Not Come On, AT- 2 11 .
❏ 2. Engine Cannot Be Started In “P” And “N” Position, AT- 2 1 2
.
❏ 3. In “P” Position, Vehicle Moves Forward Or Backward When Pushed, AT- 2 1 3
.
❏ 4. In “N” Position, Vehicle Moves, AT- 2 1 4
.
❏ 5. Large Shock. “N” → “R” Position, AT-215
.
❏ 6. Vehicle Does Not Creep Backward In “R” Position, AT- 2 1 6
.
❏ 7. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position, AT-219
.

TROUBLE DIAGNOSIS — INTRODUCTION
AT-59
[EURO-OBD]
D
E
F
G
H
I
J
K
L
MA
B
AT
4. 4-
3.Cruise testAT- 7 4 , "3.
CRUISE
TEST"
AT- 7 8 ,
"Cruise Test
— Part 1"
Part-1
❏ 8. Vehicle Cannot Be Started From D
1 , AT- 2 2 1 .
❏ 9. A/T Does Not Shift: D
1→ D2 Or Does Not Kickdown: D4→ D2 , AT- 2 2 3 .
❏ 10. A/T Does Not Shift: D
2→ D3 , AT- 2 2 5 .
❏ 11. A/T Does Not Shift: D
3→ D4 , AT-227 .
❏ 12. A/T Does Not Perform Lock-up, AT- 2 3 0
.
❏ 13. A/T Does Not Hold Lock-up Condition, AT- 2 3 1
.
❏ 14. Lock-up Is Not Released, AT- 2 3 2
.
❏ 15. Engine Speed Does Not Return To Idle (Light Braking D
4→ D3 ), AT-233 .
Part-2AT- 8 1 ,
"Cruise Test
— Part 2"❏ 16. Vehicle Does Not Start From D1 , AT- 2 3 4 .
❏ 9. A/T Does Not Shift: D
1→ D2 Or Does Not Kickdown: D4→ D2 , AT- 2 2 3 .
❏ 10. A/T Does Not Shift: D
2→ D3 , AT- 2 2 5 .
❏ 11. A/T Does Not Shift: D
3→ D4 , AT-227 .
Part-3AT- 8 3 ,
"Cruise Test
— Part 3"❏ 17. A/T Does Not Shift: D4→ D3 When Overdrive Control Switch “ON” → “OFF”, AT- 2 3 5 .
❏ 15. Engine Speed Does Not Return To Idle (Light Braking D
4→ D3 ), AT-233 .
❏ 18. A/T Does Not Shift: D
3→ 22 , When Selector Lever “D” → “2” Position, AT-235 .
❏ 15. Engine Speed Does Not Return To Idle (Light Braking D
4→ D3 ), AT-233 .
❏ 19. A/T Does Not Shift: 2
2→ 11 , When Selector Lever “2” → “1” Position, AT-236 .
❏ 20. Vehicle Does Not Decelerate By Engine Brake, AT- 2 3 7
.
❏ 21. TCM Self-diagnosis Does Not Activate (PNP & Overdrive Control Switches, and Throttle Position
Sensor Circuit Checks), AT- 2 3 7
.
❏ SELF-DIAGNOSTIC PROCEDURE/DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCE-
DURE — Mark detected items.
❏ PNP switch, AT- 111
.
❏ A/T fluid temperature sensor, AT- 11 7
.
❏ Vehicle speed sensor·A/T (Revolution sensor), AT- 1 2 3
.
❏ Engine speed signal, AT- 1 2 9
.
❏ Torque converter clutch solenoid valve, AT-159
.
❏ Line pressure solenoid valve, AT-164
.
❏ Shift solenoid valve A, AT- 1 7 1
.
❏ Shift solenoid valve B, AT- 1 7 6
.
❏ Accelerator pedal position (APP) sensor, AT-181
.
❏ Overrun clutch solenoid valve, AT- 1 8 7
.
❏ PNP & overdrive control switches, and throttle position sensor, AT- 2 3 7
.
❏ A/T fluid temperature sensor and TCM power source, AT-195
.
❏ Vehicle speed sensor·MTR, AT-201
.
❏ CAN communication line, AT- 1 9 2
❏ Control unit (RAM), control unit (ROM), AT-205 .
❏ Control unit (EEP ROM), AT-207
.
❏ Battery
❏ Others
5.❏ For self-diagnosis NG items, inspect each component. Repair or replace the damaged parts.AT- 5 0 , "
Diag-
nostic Proce-
dure Without
CONSULT-II"
6.❏ Perform all ROAD TEST and re-mark required procedures.AT- 6 8 , "Road
Te s t"
7.❏ Perform DTC CONFIRMATION PROCEDURE for following MI indicating items and check out NG items.
Refer toEC-37, "
Emission-related Diagnostic Information" .EC section
❏ DTC (P0731) A/T 1st gear function, AT- 1 3 3
.
❏ DTC (P0732) A/T 2nd gear function, AT-139
.
❏ DTC (P0733) A/T 3rd gear function, AT- 1 4 5
.
❏ DTC (P0734) A/T 4th gear function, AT- 1 5 1
.