NISSAN TERRANO 2004 Service Repair Manual

Cross-sectional View
SAT125BA
OVERALL SYSTEM
AT- 8
http://vnx.su/

Hydraulic Control Circuits
SAT624GA
OVERALL SYSTEM
AT- 9
http://vnx.su/

Shift Mechanism
The automatic transmission uses compact, dual planetary gear systems to improve power-transmission
efficiency, simplify construction and reduce weight.
It also employs an optimum shift control and superwide gear ratios. They improve starting performance and
acceleration during medium and high-speed operation.
Two one-way clutches are also employed: one is used for the forward clutch and the other for the low clutch.
These one-way clutches, combined with four accumulators, reduce shifting shock to a minimum.
CONSTRUCTION
q1Torque converter clutch piston
q
2Torque converter
q
3Oil pump
q
4Input shaft
q
5Brake band
q
6Reverse clutch
q
7High clutch
q
8Front pinion gear q
9Front sun gear
q
10Front internal gear
q
11Front planetary carrier
q
12Rear sun gear
q
13Rear pinion gear
q
14Rear internal gear
q
15Rear planetary carrier
q
16Forward clutch q
17Forward one-way clutch
q
18Overrun clutch
q
19Low one-way clutch
q
20Low & reverse brake
q
21Parking pawl
q
22Parking gear
q
23Output shaft
FUNCTION OF CLUTCH AND BRAKE
Control members Abbr. Function
q
6Reverse clutch R/C To transmit input power to front sun gear q9.
q
7High clutch H/C To transmit input power to front planetary carrier q11.
q
16Forward clutch F/C To connect front planetary carrier q11with forward one-way clutchq17.
q
18Overrun clutch O/C To connect front planetary carrier q11with rear internal gearq14.
q
5Brake band B/B To lock front sun gear q9.
q
17Forward one-way clutch F/O.C When forward clutch is engaged, to stop rear internal gear
q14from rotating in opposite
direction.
q
19Low one-way clutch L/O.C At D1position, to prevent rear internal gear q14from rotating in opposite direction.
q
20Low & reverse brake L & R/B To lock rear internal gear
q14(2, 12and 11), to lock front planetary carrier q11
(R position).
SAT509I
OVERALL SYSTEM
AT-10
http://vnx.su/

CLUTCH AND BAND CHART
Shift positionq6Reverse
clutch q7High
clutch q16Forward
clutch q18Overrun
clutch Band servo
q
17Forward
one-way
clutch q19Low
one- way
clutch q20Low &
reverse brake Lock-up Remarks
2nd
apply 3rd
release 4th
apply
P PARK
POSITION
R q qREVERSE
POSITION
N NEUTRAL
POSITION
D*4 1st
q*1
vv
Automatic shift
1 ) 2) 3) 4
2nd
q*1
q v
3rd qq*1
*2v
4th q
*3qq
2 1st
q
vv
Automatic shift
1) 2
2nd q
qv
1 1st
qq vqLocks (held sta-
tionary)
in 1st speed 1+ 2
2nd
qqq v
*1: Operates when overdrive control or A/T mode switch is being set in ªOFFº or ªSPORTº position.
*2: Oil pressure is applied to both 2nd ªapplyº side and 3rd ªreleaseº side of band servo piston. However, brake band does not contract because oil pressure area on the ªreleaseº side is greater than that on the ªapplyº side.
*3: Oil pressure is applied to 4th ªapplyº side in condition *2 above, and brake band contracts.
*4: A/T will not shift to 4th when overdrive control or A/T mode switch is set in ªOFFº or ªSPORTº position.
q : Operates.
: Operates when throttle opening is less than 3/16, activating engine brake.
v : Operates during ªprogressiveº acceleration.
: Operates but does not affect power transmission.
: Operates when throttle opening is less than 3/16, but does not affect engine brake.
OVERALL SYSTEM
Shift Mechanism (Cont'd)
AT-11
http://vnx.su/

Control System
OUTLINE
The automatic transmission senses vehicle operating conditions through various sensors. It always controls
the optimum shaft position and reduces shifting and lock-up shocks.
SENSORSTCMACTUATORS
Park/neutral position switch
Throttle (accelerator) position
sensor
Closed throttle position switch
Wide open throttle position
switch
Engine speed signal
A/T fluid temperature sensor
Revolution sensor
Vehicle speed sensor
Overdrive control switch
A/T mode switch
E
Shift control
Line pressure control
Lock-up control
Overrun clutch control
Timing control
Fail-safe control
Self-diagnosis
Duet-EU control
CONSULT-II communication line
control
E
Shift solenoid valve A
Shift solenoid valve B
Overrun clutch solenoid valve
Torque converter clutch
solenoid valve
Line pressure solenoid valve
O/D OFF or SPORT indicator
lamp
CONTROL SYSTEM
NAT230
OVERALL SYSTEM
AT-12
http://vnx.su/

TCM FUNCTION
The function of the TCM is to:
IReceive input signals sent from various switches and sensors.
I Determine required line pressure, shifting point, lock-up operation, and engine brake operation.
I Send required output signals to the respective solenoids.
INPUT/OUTPUT SIGNAL OF TCM
Sensors and solenoid valves Function
Input Park/neutral position switch
Detects select lever position and sends a signal to TCM.
Throttle (accelerator) position sensor Detects throttle valve position and sends a signal to TCM.
Closed throttle position switch Detects throttle valve's fully-closed position and sends a signal to TCM.
Wide open throttle position switch Detects a throttle valve position of greater than 1/2 of full throttle and sends a
signal to TCM.
Engine speed signal From ECM.
A/T fluid temperature sensor Detects transmission fluid temperature and sends a signal to TCM.
Revolution sensor Detects output shaft rpm and sends a signal to TCM.
Vehicle speed sensor Used as an auxiliary vehicle speed sensor. Sends a signal when revolution sen-
sor (installed on transmission) malfunctions.
Overdrive control switch
A/T mode switch Sends a signal, which prohibits a shift to ªD
4º (overdrive) position, to the TCM.
Output Shift solenoid valve A/B
Selects shifting point suited to driving conditions in relation to a signal sent from
TCM.
Line pressure solenoid valve Regulates (or decreases) line pressure suited to driving conditions in relation to
a signal sent from TCM.
Torque converter clutch solenoid valve Regulates (or decreases) lock-up pressure suited to driving conditions in relation
to a signal sent from TCM.
Overrun clutch solenoid valve Controls an ªengine brakeº effect suited to driving conditions in relation to a sig-
nal sent from TCM.
O/D OFF indicator lamp
SPORT indicator lamp Shows TCM malfunctions, when A/T control components malfunction.
OVERALL SYSTEM
Control System (Cont'd)
AT-13
http://vnx.su/

Self-diagnosis
After performing this procedure, place check marks for results on
the ªDIAGNOSTIC WORKSHEETº, AT-24. Reference pages are
provided following the items.
SELF-DIAGNOSTIC PROCEDURE (With CONSULT-II)
1. Turn on CONSULT-II and touch ªA/Tº.If A/T is not displayed, check TCM power supply and ground
circuit. Refer to AT-46. If result is NG, refer to EL section
(ªPOWER SUPPLY ROUTINGº).
2. Touch ªSELF-DIAG RESULTSº. Display shows malfunction experienced since the last erasing
operation.
CONSULT-II performs REAL-TIME SELF-DIAGNOSIS.
Also, any malfunction detected while in this mode will be dis-
played at real time.
Item Display DescriptionRemarks
No failure ****NO FAILURE
****I
No failure has been detected.
Initial start *INITIAL START
*I
This is NOT a malfunction message.
Whenever shutting off a power supply to the
TCM, this message appears on the screen.
[]
Vehicle speed
sensor×A/T
(Revolution sensor) VHCL SPEED SEN×A/T I
No signal input from vehicle speed sensor×A/T (revolution
sensor) during traveling due to disconnection, or input of
abnormal signal.
Vehicle speed
sensor×MTR (Meter) VHCL SPEED SEN×MTR I
No signal input from vehicle speed sensor×MTR during
traveling due to disconnection, or input of abnormal signal.
Throttle (accelerator)
position sensor THROTTLE POSI SEN I
Throttle (accelerator) position sensor signal voltage is
abnormally high.
I Throttle (accelerator) position sensor signal voltage is
abnormally low with closed throttle position switch ªOFFº
or wide open throttle position switch ªONº.
Shift solenoid valve A SHIFT SOLENOID/V A I
Specified voltage is not applied to solenoid valve due to
disconnection or shortcircuit.
Shift solenoid valve B SHIFT SOLENOID/V B I
Specified voltage is not applied to solenoid valve due to
disconnection or shortcircuit.
Overrun clutch
solenoid valve OVERRUN CLUTCH S/V I
Specified voltage is not applied to solenoid valve due to
disconnection or shortcircuit.
T/C clutch solenoid
valve T/C CLUTCH SOL/V I
Specified voltage is not applied to solenoid valve due to
disconnection or shortcircuit.
A/T fluid temperature
sensor/TCM power
source BATT/FLUID TEMP SEN I
Supply voltage to TCM is abnormally low during traveling.
I Fluid temperature signal voltage is abnormally high
(fluid temperature is low) during traveling. To be dis-
played in case
of abnormality
and no record-
ing is made
Engine speed signal ENGINE SPEED SIG
IEngine RPM is abnormally low during traveling.
Line pressure
solenoid valve LINE PRESSURE S/V I
Specified voltage is not applied to solenoid valve due to
disconnection or shortcircuit.
TCM (ROM) CONTROL UNIT (ROM) ITCM memory (ROM) is malfunctioning.
TCM (RAM) CONTROL UNIT (RAM) ITCM memory (RAM) is malfunctioning.
SAT014K
SAT987J
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
AT-14
http://vnx.su/

SELF-DIAGNOSTIC PROCEDURE (Without
CONSULT-II)
DIAGNOSIS START
1. Start engine and warm it up to normalengine operating temperature.
2. Turn ignition switch to ªOFFº position. Wait at least 5 seconds.
1. Set A/T mode switch to ªAUTOº posi-tion.
2. Set overdrive control switch in ªONº position.
3. Move selector lever to ªPº position.
4. Turn ignition switch to ªONº position. (Do not start engine.)
5. Does SPORT indicator lamp come on for about 2 seconds?
Ye s
ENo Go to 1. SPORT Indicator
Lamp Does Not Come On,
AT-97.
1. Turn ignition switch to ªACCº position.
2. Move selector lever to ªDº position.
qA
NAT309
SAT879E
SAT244I
H
H
H
H
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont'd)
AT-15
http://vnx.su/

qA
1. Set overdrive control switch in ªOFFºposition.
2. Depress accelerator pedal fully and release it.
3. Turn ignition switch ªONº. (Do not start engine.)
1. Move selector lever to ª2º position.
2. Set overdrive control switch in ªONº position.
1. Move selector lever to ª1º position.
2. Set overdrive control switch in ªOFFº position.
Depress accelerator pedal fully and
release it.
Check SPORT indicator lamp.
Refer to JUDGEMENT OF SELF-
DIAGNOSIS CODE, AT-17.
DIAGNOSIS END
SAT881E
FAT245I
SAT246I
SAT981F
NAT309
H
H
H
H
H
H
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont'd)
AT-16
http://vnx.su/

JUDGEMENT OF SELF-DIAGNOSIS CODE
SPORT indicator lamps
All judgement flickers are same.
SAT819H
All circuits that can be confirmed by self-diagnosis are OK.
4th judgement flicker is longer than others.
SAT797H
Shift solenoid valve A circuit is short-circuited or discon-
nected.
Go to SHIFT SOLENOID VALVE A, AT-65.
1st judgement flicker is longer than others.
SAT794H
Revolution sensor circuit is short-circuited or disconnected.
Go to VEHICLE SPEED SENSOR ×A/T (REVOLUTION
SENSOR), AT-52.
5th judgement flicker is longer than others.
SAT798H
Shift solenoid valve B circuit is short-circuited or discon-
nected.
Go to SHIFT SOLENOID VALVE B, AT-68.
2nd judgement flicker is longer than others.
SAT795HVehicle speed sensor circuit is short-circuited or discon-
nected.
Go to VEHICLE SPEED SENSOR ×MTR, AT-56.
6th judgement flicker is longer than others.
SAT799H
Overrun clutch solenoid valve circuit is short-circuited or dis-
connected.
Go to OVERRUN CLUTCH SOLENOID VALVE, AT-71.
3rd judgement flicker is longer than others.
SAT796H
Throttle (accelerator) position sensor circuit is short-circuited
or disconnected.
Go to THROTTLE (ACCELERATOR) POSITION
SENSOR, AT-62.
7th judgement flicker is longer than others.
SAT800H
Torque converter clutch solenoid valve circuit is short-cir-
cuited or disconnected.
Go to TORQUE CONVERTER CLUTCH SOLENOID
VALVE, AT-74.
t1= 2.5 seconds t2= 2.0 seconds t3= 1.0 second
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont'd)
AT-17
http://vnx.su/