2005 NISSAN NAVARA gear ratio

AT-1
AUTOMATIC TRANSMISSION
C TRANSMISSION/TRANSAXLE
CONTENTS
D
E
F
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H
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K
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M
SECTIONAT
A
B
AT
AUTOMATIC TRANSMISSION
INDEX FOR DTC ........................................................ 5
Alphabetical Index .................................................... 5
DTC No. Index ......................................................... 6
PRECAUTIONS .......................................................... 7
Precautions for Supplemental Restraint System
(SRS)“AIRBAG”and“SEATBELTPRE-TEN-
SIONER” .................................................................. 7
Precautions .............................................................. 7
Wiring Diagrams and Trouble Diagnosis .................. 8
PREPARATION ........................................................... 9
Special Service Tools ............................................... 9
Commercial Service Tools ...................................... 10
A/T FLUID ..................................................................11
Changing A/T Fluid ................................................. 11
Checking A/T Fluid ................................................. 12
A/T CONTROL SYSTEM .......................................... 14
Cross-Sectional View (2WD Models) ..................... 14
Cross-Sectional View (4WD Models) ..................... 15
Shift Mechanism ..................................................... 16
TCM Function ......................................................... 27
CAN Communication .............................................. 28
Input/Output Signal of TCM .................................... 28
Line Pressure Control ............................................ 29
Shift Control ........................................................... 30
Lock-up Control ...................................................... 31
Engine Brake Control ............................................. 32
Control Valve .......................................................... 33
TROUBLE DIAGNOSIS ............................................ 34
DTC Inspection Priority Chart ................................ 34
Fail-safe ................................................................. 34
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ..................................................... 36
A/T Electrical Parts Location .................................. 41
Circuit Diagram ...................................................... 42
Inspections Before Trouble Diagnosis .................... 43
Check Before Engine Is Started ............................. 46
Check at Idle .......................................................... 47
Cruise Test - Part 1 ................................................ 48
Cruise Test - Part 2 ................................................ 50
Cruise Test - Part 3 ................................................ 51Vehicle Speed at Which Gear Shifting Occurs ....... 52
Vehicle Speed at Which Lock-up Occurs/Releases... 52
Symptom Chart ....................................................... 53
TCM Input/Output Signal Reference Values ........... 76
CONSULT-II Function (A/T) .................................... 77
Diagnostic Procedure Without CONSULT-II ........... 89
DTC U1000 CAN COMMUNICATION LINE .............. 91
Description .............................................................. 91
On Board Diagnosis Logic ...................................... 91
Possible Cause ....................................................... 91
DTC Confirmation Procedure ................................. 91
Wiring Diagram — AT — CAN ................................ 92
Diagnostic Procedure ............................................. 93
DTC P0615 START SIGNAL CIRCUIT ..................... 94
Description .............................................................. 94
CONSULT-II Reference Value ................................ 94
On Board Diagnosis Logic ...................................... 94
Possible Cause ....................................................... 94
DTC Confirmation Procedure ................................. 94
Wiring Diagram — AT — STSIG ............................ 95
Diagnostic Procedure ............................................. 96
DTC P0700 TCM ....................................................... 98
Description .............................................................. 98
On Board Diagnosis Logic ...................................... 98
Possible Cause ....................................................... 98
DTC Confirmation Procedure ................................. 98
Diagnostic Procedure ............................................. 98
DTC P0705 PARK/NEUTRAL POSITION SWITCH... 99
Description .............................................................. 99
CONSULT-II Reference Value ................................ 99
On Board Diagnosis Logic ...................................... 99
Possible Cause ....................................................... 99
DTC Confirmation Procedure ................................. 99
Wiring Diagram — AT — PNP/SW .......................100
Diagnostic Procedure ...........................................101
DTC P0720 VEHICLE SPEED SENSOR A/T (REV-
OLUTION SENSOR) ...............................................103
Description ............................................................103
CONSULT-II Reference Value ..............................103
On Board Diagnosis Logic ....................................103

AT-12
A/T FLUID
Checking A/T Fluid
ECS00FWE
1. Warm up engine.
2. Check for A/T fluid leakage.
3. Loosen level gauge bolt.
4. Before driving, A/T fluid level can be checked at A/T fluid tem-
peratures of 30 to 50°C (86 to 122°F) using “COLD” range on A/
T fluid level gauge as follows.
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 A/T fluid level with engine idling.
d. Remove A/T fluid level gauge and wipe clean with lint-free
paper.
CAUTION:
When wiping away A/T fluid level gauge, always use lint-
free paper, not a cloth one.
e. Reinsert A/T fluid level gauge into A/T fluid charging pipe as far as it will go.
CAUTION:
To check A/T fluid level, insert A/T fluid level gauge until the cap contacts the end of A/T fluid
charging pipe, with A/T fluid level gauge reversed from the normal attachment conditions.
f. Remove A/T fluid level gauge and note reading. If reading is at low side of range, add ATF to A/T fluid
charging pipe.
CAUTION:
Do not overfill.
5. Drive vehicle for approximately 5 minutes in urban areas.
6. Make the A/T fluid temperature approximately 65°C(149°F).
NOTE:
A/T fluid level will be greatly affected by temperature as shown in figure. Therefore, be certain to
perform operation while checking data with CONSULT-II.
a. Connect CONSULT-II to data link connector. Refer toAT-79, "
CONSULT-II SETTING PROCEDURE".
b. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
c. Readthevalueof“ATFTEMP1”.
7. Recheck A/T fluid level at A/T fluid temperatures of approximately 65°C(149°F)using“HOT”rangeonA/
T fluid level gauge.
SCIA7120E
SLIA0016E

AT-16
A/T CONTROL SYSTEM
Shift Mechanism
ECS00FWH
The A/T uses compact triple planetary gear systems to improve power transmission efficiency, simplify con-
struction and reduce weight.
It also employs an optimum shift control and super wide gear ratios. They improve starting performance and
acceleration during medium and high-speed operation.
CONSTRUCTION
FUNCTION OF CLUTCH AND BRAKE
1. Front brake 2. Input clutch 3. Direct clutch
4. High and low reverse clutch 5. Reverse brake 6. Forward brake
7. Low coast brake 8. 1st one-way clutch 9. Forward one-way clutch
10. 3rd one-way clutch 11. Front sun gear 12. Input shaft
13. Mid internal gear 14. Front internal gear 15. Rear carrier
16. Rear sun gear 17. Mid sun gear 18. Front carrier
19. Mid carrier 20. Rear internal gear 21. Output shaft
22. Parking gear 23. Parking pawl
PCIA0002J
Name of the Part Abbreviation Function
Front brake (1) FR/B Fastens the front sun gear (11).
Input clutch (2) I/CConnects the input shaft (12), the front internal gear (14) and the mid internal gear
(13).
Direct clutch (3) D/C Connects the rear carrier (15) and the rear sun gear (16).
High and low reverse clutch (4) HLR/C Connects the mid sun gear (17) and the rear sun gear (16).
Reverse brake (5) R/B Fastens the rear carrier (15).
Forward brake (6) Fwd/B Fastens the mid sun gear (17).
Low coast brake (7) LC/B Fastens the mid sun gear (17).
1st one-way clutch (8) 1st OWCAllows the rear sun gear (16) to turn freely forward relative to the mid sun gear (17)
but fastens it for reverse rotation.
Forward one-way clutch (9) Fwd OWCAllows the mid sun gear (17) to turn freely in the forward direction but fastens it for
reverse rotation.
3rd one-way clutch (10) 3rd OWCAllows the front sun gear (11) to turn freely in the forward direction but fastens it for
reverse rotation.

A/T CONTROL SYSTEM
AT-17
D
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MA
B
AT
CLUTCH AND BAND CHART
l—Operates
l—Operates during “progressive” acceleration.
l—Operates and effects power transmission while coasting.
l—Line pressure is applied but does not affect power transmission.
l—Operates under conditions shown in HLR/C Operating Condition
l—Operates under conditions shown in LC/B Operating Condition. Delay control is applied during “D” (4,3,2,1)
“N” shift.
l*1: A/T will not shift to 5th when overdrive control switch is set in OFF position.Shift position I/C HLR/C D/C R/B FR/B LC/B Fwd/B1st
OWCFwd
OWC3rd
OWCRemarks
PPARK POSITION
RREVERSE POSI-
TION
NNEUTRAL POSI-
TION
D*11st
Automatic shift
1Û2Û3Û4Û5 2nd
3rd
4th
5th
31st
Automatic shift
1Û2Û3Ü4 2nd
3rd
4th
21st
Automatic shift
1Û2Ü3Ü4 2nd
3rd
4th
11st
Locks (held sta-
tionary in 1st
gear)
1Ü2Ü3Ü4 2nd
3rd
4th
SCIA5642E

A/T CONTROL SYSTEM
AT-19
D
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B
AT
“D”, “3” and “2” Positions 1st Gear
lThe forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.
lThe 1st one-way clutch regulates reverse rotation of the rear sun gear.
lThe 3rd one-way clutch regulates reverse rotation of the front sun gear.
lDuring deceleration, the mid sun gear turns forward, so the forward one-way clutch idles and the engine
brake is not activated.
1. Front brake 2. Input clutch 3. Direct clutch
4. High and low reverse clutch 5. Reverse brake 6. Forward brake
7. Low coast brake 8. 1st one-way clutch 9. Forward one-way clutch
10. 3rd one-way clutch 11. Front sun gear 12. Input shaft
13. Mid internal gear 14. Front internal gear 15. Rear carrier
16. Rear sun gear 17. Mid sun gear 18. Front carrier
19. Mid carrier 20. Rear internal gear 21. Output shaft
22. Parking gear 23. Parking pawl
SCIA1512E

AT-20
A/T CONTROL SYSTEM
“1 ” Position 1st Gear
lThe front brake fastens the front sun gear.
lThe forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.
lHigh and low reverse clutch connects the rear sun gear and the mid sun gear.
lThe low coast brake fastens the mid sun gear.
lDuring deceleration, the low coast brake regulates forward rotation of the mid sun gear and the engine
brake functions.
1. Front brake 2. Input clutch 3. Direct clutch
4. High and low reverse clutch 5. Reverse brake 6. Forward brake
7. Low coast brake 8. 1st one-way clutch 9. Forward one-way clutch
10. 3rd one-way clutch 11. Front sun gear 12. Input shaft
13. Mid internal gear 14. Front internal gear 15. Rear carrier
16. Rear sun gear 17. Mid sun gear 18. Front carrier
19. Mid carrier 20. Rear internal gear 21. Output shaft
22. Parking gear 23. Parking pawl
SCIA1513E

A/T CONTROL SYSTEM
AT-21
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AT
“D” and “3” Positions 2nd Gear
lThe forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.
lThe 3rd one-way clutch regulates reverse rotation of the front sun gear.
lThe direct clutch is coupled and the rear carrier and rear sun gear are connected.
lDuring deceleration, the mid sun gear turns forward, so the forward one-way clutch idles and engine
brake is not activated.
1. Front brake 2. Input clutch 3. Direct clutch
4. High and low reverse clutch 5. Reverse brake 6. Forward brake
7. Low coast brake 8. 1st one-way clutch 9. Forward one-way clutch
10. 3rd one-way clutch 11. Front sun gear 12. Input shaft
13. Mid internal gear 14. Front internal gear 15. Rear carrier
16. Rear sun gear 17. Mid sun gear 18. Front carrier
19. Mid carrier 20. Rear internal gear 21. Output shaft
22. Parking gear 23. Parking pawl
SCIA1514E

AT-22
A/T CONTROL SYSTEM
“2” and “1” Positions 2nd Gear
lThe front brake fastens the front sun gear.
lThe forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.
lThe direct clutch is coupled, and the rear carrier and rear sun gear are connected.
lThe low coast brake fastens the mid sun gear.
lDuring deceleration, the low coast brake regulates forward rotation of the mid sun gear and the engine
brake functions.
1. Front brake 2. Input clutch 3. Direct clutch
4. High and low reverse clutch 5. Reverse brake 6. Forward brake
7. Low coast brake 8. 1st one-way clutch 9. Forward one-way clutch
10. 3rd one-way clutch 11. Front sun gear 12. Input shaft
13. Mid internal gear 14. Front internal gear 15. Rear carrier
16. Rear sun gear 17. Mid sun gear 18. Front carrier
19. Mid carrier 20. Rear internal gear 21. Output shaft
22. Parking gear 23. Parking pawl
SCIA1515E