2011 NISSAN TIIDA engine control system

A/T CONTROL SYSTEMAT-21
< SERVICE INFORMATION >
DE
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AT
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A/T CONTROL SYSTEM
Cross-Sectional ViewINFOID:0000000005928073
HR16DE engine models
SCIA7651J
1. Converter housing 2. Oil pump3. Brake band
4. Reverse clutch 5. High clutch6. Front planetary gear
7. Low one-way clutch 8. Rear planetary gear9. Forward clutch
10. Overrun clutch 11. Low & reverse brake12. Output gear
13. Band servo piston 14. Reverse clutch drum15. Side cover
16. Idler gear 17. Forward one-way clutch 18. Transaxle case
19. Reduction pinion gear 20. Final gear 21. Differential case
22. Input shaft 23. Torque converter
Revision: May 2010 2011 Versa

AT-22
< SERVICE INFORMATION >
A/T CONTROL SYSTEM
MR18DE engine models
Shift MechanismINFOID:0000000005928074
CONSTRUCTION
SCIA7938E
1. Converter housing2. Oil pump3. Brake band
4. Reverse clutch 5. High clutch6. Front planetary gear
7. Low one-way clutch 8. Rear planetary gear9. Forward clutch
10. Overrun clutch 11. Low & reverse brake12. Output gear
13. Band servo piston 14. Reverse clutch drum15. Side cover
16. Idler gear 17. Forward one-way clutch 18. Transaxle case
19. Reduction pinion gear 20. Final gear21. Differential case
22. Input shaft 23. Torque converter
Revision: May 2010 2011 Versa

A/T CONTROL SYSTEMAT-23
< SERVICE INFORMATION >
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FUNCTION OF CLUTCH AND BRAKE
CLUTCH AND BAND CHART
1. Torque converter 2. Oil pump 3. Input shaft
4. Brake band 5. Reverse clutch 6. High clutch
7. Front sun gear 8. Front pinion gear 9. Front internal gear
10. Front planetary carrier 11. Rear sun gear 12. Rear pinion gear
13. Rear internal gear 14. Rear planetary carrier 15. Forward clutch
16. Forward one-way clutch 17. Overrun clutch 18. Low one-way clutch
19. Low & reverse brake 20. Parking pawl 21. Parking gear
22. Output shaft 23. Idle gear 24. Output gear
SAT998I
Clutch and brake components Abbr. Function
5 Reverse clutch R/C To transmit input power to front sun gear 7 .
6 High clutch H/C To transmit input power to front planetary carrier 10.
15 Forward clutch F/C To connect front planetary carrier 10 with forward one-way clutch 16.
17 Overrun clutch O/C To connect front planetary carrier 10 with rear internal gear 13 .
4 Brake band B/B To lock front sun gear 7.
16 Forward one-way clutch F/O.C When forward clutch 15
is engaged, to stop rear internal gear 13 from rotating in
opposite direction against engine revolution.
18 Low one-way clutch L/O.CTo stop front planetary carrier
10 from rotating in opposite direction against en-
gine revolution.
19 Low & reverse brake L & R/B To lock front planetary carrier 10.
Shift posi-
tion R/C
5 H/C
6 F/C
15 O/C
17 Band servo
F/O.C
16 L/O.C
18 L&R/B
19 Lock-
up Remarks
2nd
apply 3rd re-
lease 4th ap-
ply
P PA R K
POSITION
R REVERSE
POSITION
N NEUTRAL
POSITION
D*4 1st *1DB B
Revision: May 2010 2011 Versa

AT-24
< SERVICE INFORMATION >
A/T CONTROL SYSTEM
• *1: Operates when OD OFF. (OD OFF indicator lamp is on.)
• *2: Oil pressure is applied to both 2nd “apply” side and 3rd “release” side of band servo piston. However, brake band does not contract
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 on condition *2 above, and brake band contracts.
• *4: A/T will not shift to 4th when OD OFF. (OD OFF indicator lamp is on.)
• : Operates.
• A: Operates when throttle opening is less than specification**, activating engine brake.
• B: Operates during “pro gressive” acceleration.
• C: Operates but does not affect power transmission.
• D: Operates when throttle opening is less than specification**, but does not affect engine brake.
- **: Overrun clutch remains in engaged condition when throttle opening is less than 1/16.
POWER TRANSMISSION
“N” and “P” Positions
• “N” position Power from the input shaft is not transmitted to the output shaft because the clutches do not operate.
• “P” position
Similar to the “N” position, the clutches do not operate. The parking pawl engages with the parking gear to
mechanically hold the output shaft so that the power train is locked.
“11” Position
2nd *1A BAutomatic
shift
3rd *1A *2C C B
*11
⇔ 2 ⇔ 3
⇔ 4
4th C*3C C
2 1st
BB
Automatic
shift
1 ⇔ 2 ⇐ 3
2nd
B
3rd *2C CB
1 1st
BB
Locks (held
stationary)
in 1st speed 1 ⇐ 2 ⇐ 3
2nd
B
3rd *2C CB
Shift posi-
tion R/C
5 H/C
6 F/C
15 O/C
17 Band servo
F/O.C
16 L/O.C
18 L&R/B
19 Lock-
up Remarks
2nd
apply 3rd re-
lease 4th ap-
ply
SAT991I
Revision: May 2010 2011 Versa

A/T CONTROL SYSTEMAT-25
< SERVICE INFORMATION >
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“D
1” and “21” Positions
*: Overrun clutch remains in engaged condition when throttle opening is less than 1/16. •
Forward clutch
• Forward one-way clutch
• Overrun clutch
• Low & reverse brake As overrun clutch engages, rear internal gear is locked by the operation of low and re-
verse brake.
This is different from that of D
1 and 21.
Engine brake Overrun clutch always engages, therefore engine brake can be obtained when deceler-
ating.
SCIA1816E
• Forward one-way clutch
• Forward clutch
• Low one-way clutch Rear internal gear is locked to rotate counterclockwise because of the functioning of these three
clutches.
Overrun clutch
engagement conditions
(Engine brake) D
1: OD OFF (OD OFF indicator lamp is on) and th
rottle opening is less than specification*
2
1: Always engaged
At D
1 and 21 positions, engine brake is not activated due to free turning of low one- way clutch.
Revision: May 2010 2011 Versa

AT-28
< SERVICE INFORMATION >
A/T CONTROL SYSTEM
“D4” (OD) Position
SAT379J
•High clutch
• Brake band
• Forward clutch (Does not affect power
transmission) Input power is transmitted to front carrier through high clutch.
This front carrier turns around the sun gear which is fixed by brake band and makes
front internal gear (output) turn faster.
Engine brake At D
4 position, there is no one-way clutch in the power transaxle line and engine brake
can be obtained when decelerating.
Revision: May 2010 2011 Versa

A/T CONTROL SYSTEMAT-29
< SERVICE INFORMATION >
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“R” Position
SAT380J
•
Reverse clutch
• Low & reverse brake Front planetary carrier is stationary because of the operation of low and reverse brake.
Input power is transmitted to front sun gear through reverse clutch, which drives front
internal gear in the opposite direction.
Engine brake As there is no one-way clutch in the power transaxle line, engine brake can be obtained
when decelerating.
Revision: May 2010
2011 Versa

AT-30
< SERVICE INFORMATION >
A/T CONTROL SYSTEM
TCM Function
INFOID:0000000005928075
The function of the TCM is to:
• Receive input signals sent from various switches and sensors.
• Determine required line pressure, shifting poi nt, lock-up operation, and engine brake operation.
• Send required output signals to the respective solenoids.
CONTROL SYSTEM OUTLINE
The automatic transaxle senses vehicle operating conditions through various sensors or signals. It always
controls the optimum shift position and reduces shifting and lock-up shocks.
SAT381J
SWITCHES & SENSORS
⇒TCM
⇒ACTUATORS
Transmission range switch
Accelerator pedal position signal
Closed throttle position signal
Wide open throttle position signal
Engine speed signal
A/T fluid temperature sensor
Output speed sensor
Input speed sensor
Vehicle speed signal
Overdrive control switch signal
Stop lamp switch signal Shift control
Line pressure control
Lock-up control
Overrun clutch control
Fail-safe control
Self-diagnosis
CONSULT-III communication
line control
Shift solenoid valve A
Shift solenoid valve B
Overrun clutch solenoid valve
Torque converter clutch solenoid
valve
Line pressure solenoid valve
OD OFF indicator lamp
Revision: May 2010
2011 Versa