2003 NISSAN TEANA Vq23de

ACCELERATOR CONTROL SYSTEM
ACC-3
C
D
E
F
G
H
I
J
K
L
MA
ACC

ACCELERATOR CONTROL SYSTEMPFP:18005
Removal and InstallationBBS005AN
REMOVAL
1. Disconnect accelerator pedal position sensor harness connector.

Pull connector lock in a rear direction in the figure, to discon-
nect accelerator pedal position sensor harness connector.
2. Loosen mounting bolts and nut, and remove accelerator pedal assembly.
CAUTION:

Do not disassemble accelerator pedal assembly. Do not remove accelerator pedal position sen-
sor from accelerator pedal assembly.

Avoid impact from dropping etc. during handling.

Be careful to keep accelerator pedal assembly away from water.
INSTALLATION
Installation is the reverse order of removal.
INSPECTION AFTER INSTALLATION

Make sure that accelerator pedal moves smoothly within the whole operation range.

Make sure that accelerator pedal securely returns to the original position.

For the electrical inspection of accelerator pedal position sensor, refer to the following.
–QR20DE
EC-251, "
DTC P2122, P2123 APP SENSOR", EC-258, "DTC P2127, P2128 APP SENSOR" and EC-
272, "DTC P2138 APP SENSOR"
–VQ23DE and VQ35DE
1. Accelerator pedal assembly
: Vehicle front
PBIC4773E
PBIC2814E

ACC-4
ACCELERATOR CONTROL SYSTEM

EC-631, "DTC P2122, P2123 APP SENSOR", EC-638, "DTC P2127, P2128 APP SENSOR" and EC-
652, "DTC P2138 APP SENSOR"
CAUTION:

When harness connector of accelerator pedal position sensor is disconnected, perform “Acceler-
ator Pedal Released Position Learning”. Refer to the following.
–QR20DE
EC-47, "
Accelerator Pedal Released Position Learning"
–VQ23DE and VQ35DE
EC-389, "
Accelerator Pedal Released Position Learning"

A/T FLUID
AT-15
D
E
F
G
H
I
J
K
L
MA
B
AT

6. Check A/T fluid condition.

If ATF is very dark or smells burned, checking operation of A/
T. Flush cooling system after repair of A/T.

If ATF contains frictional material (clutches, bands, etc.),
replace radiator and flush cooler line using cleaning solvent
and compressed air after repair of A/T. Refer to CO-37,
"RADIATOR" , CO-40, "RADIATOR (ALUMINUM TYPE)" .
7. Install the removed A/T fluid level gauge in the A/T fluid charging
pipe.
CAUTION:
Firmly fix the A/T fluid level gauge to the A/T fluid charging
pipe using a stopper attached.
Changing A/T FluidBCS000ZM
1. Warm up ATF.
2. Stop engine.
3. Drain ATF from drain plug and refill with new ATF. Always refill same volume with drained ATF.
CAUTION:
Do not reuse drain plug gasket.
4. Run engine at idle speed for 5 minutes.
5. Check A/T fluid level and condition. Refer to AT- 1 4 , "
Checking A/T Fluid" . If ATF is still dirty, repeat steps
2 through 5.
SAT638A
Fluid grade:
Genuine NISSAN ATF Matic Fluid D or equivalent.
Refer to MA-14, "
RECOMMENDED FLUIDS AND LUBRICANTS"
.
Fluid capacity
For QR20DE engine models
: Approx. 8.4 (7-3/8 lmp qt)
For VQ23DE engine models
: Approx. 8.9 (7-7/8 lmp qt)
Drain plug:
: 34 N·m (3.5 kg-m, 25 ft-lb)

AT-44
TROUBLE DIAGNOSIS

6. Accelerate to wide open throttle gradually while applying foot
brake.
7. Quickly note the engine stall revolution and immediately release
throttle.
CAUTION:
Do not hold down the accelerator pedal for more than 5 sec-
onds during this test.
8. Move selector lever to “N” position.
9. Cool off ATF.
CAUTION:
Run engine at idle for at leas 1 minute.
10. Repeat steps 6 through 9 with selector lever in “3”, “2”, “1” and
“R” positions.
Judgement of Stall Test
The test result and possible damaged components relating to each result are shown in the illustrations on next
page.
In order to pinpoint the possible damaged components, refer to AT- 3 7 , "
Work Flow Chart" .
NOTE:
Stall revolution is too high in “D”, “3”, “2”, or “1” position:

Slippage occurs in 1st gear but not in 2nd and 3rd gears. ..... Low one-way clutch slippage

Slippage occurs in the following gears:
1st through 3rd gears in “D” position and engine brake functions with selector lever set to “3” position.
1st and 2nd gears in “2” position and engine brake functions with accelerator pedal released (fully closed
throttle)...... Forward clutch or forward one-way clutch slippage
Stall revolution is too high in “R” position:

Engine brake does not function in “1” position. ..... Low & reverse brake slippage

Engine brake functions in “1” position. ..... Reverse clutch slippage
Stall revolution within specifications:

Vehicle does not achieve speed of more than 80 km/h (50 MPH). ..... One-way clutch seizure in torque
converter housing
CAUTION:
Be careful since automatic fluid temperature increases abnormally.

Slippage occurs in 3rd and 4th gears in “D” position. ..... High clutch slippage

Slippage occurs in 2nd and 4th gear in “D” position. ..... Brake band slippage

Engine brake does not function in 2nd and 3rd gears in “D” position with 3rd position switch set to ON, 2nd
gear in “2” position, and 1st gear in “1” position. ..... Overrun clutch slippage
Stall revolution less than specifications:

Poor acceleration during starts. ..... One-way clutch seizure in torque converterStall revolution
For QR20DE engine models:
2,400 - 2,850 rpm
For VQ23DE engine models:
2,400 - 2,900 rpm
SAT514G
SCIA5704E

AT-54
TROUBLE DIAGNOSIS

Vehicle Speed Which Gear Shifting OccursBCS00109
FOR QR20DE ENGINE MODELS

At half throttle, the accelerator opening is 4/8 of the full opening.
FOR VQ23DE ENGINE MODELS

At half throttle, the accelerator opening is 4/8 of the full opening.
Vehicle Speed at When Lock-up Occurs/ReleasesBCS0010A
FOR QR20DE ENGINE MODELS
NOTE:

Perform lock-up inspection after warming up engine.

Lock-up vehicle speed may vary depending on the driving conditions and circumstances.
FOR VQ23DE ENGINE MODELS
NOTE:

Perform lock-up inspection after warming up engine.

Lock-up vehicle speed may vary depending on the driving conditions and circumstances. Throttle positionVehicle speed km/h (MPH)
D
1 → D2D2 → D3D3 → D4D4 → D3D3 → D2D2 → D1
Full throttle51 - 59
(32 - 37)96 - 104
(60 - 65)151 - 159
(94 - 99)147 - 155
(91 - 96)86 - 94
(53 - 58)40 - 48
(25 - 30)
Half throttle33 - 41
(21 - 25)62 - 70
(39 - 43)121 - 129
(75 - 80)77 - 85
(48 - 53)37 - 45
(23 - 28)5 - 13
(3 - 8)
Throttle positionVehicle speed km/h (MPH)
D1 → D2D2 → D3D3 → D4D4 → D3D3 → D2D2 → D1
Full throttle52 - 60
(32 - 37)97 - 105
(60 - 65)153 - 161
(95 - 100)149 - 157
(93 - 98)87 - 95
(54 - 59)41 - 49
(25 - 30)
Half throttle30 - 38
(19 - 24)58 - 66
(36 - 41)116 - 124
(72 - 77)69 - 77
(43 - 48)34 - 42
(21 - 26)5 - 13
(3 - 8)
Throttle position Selector lever positionVehicle speed km/h (MPH)
Lock-up “ON” Lock-up “OFF”
2.0/8 D position 86 - 94 (53 - 58) 61 - 69 (38 - 43)
3rd position 86 - 94 (53 - 58) 83 - 91 (52 - 57)
Throttle position Selector lever positionVehicle speed km/h (MPH)
Lock-up “ON” Lock-up “OFF”
2.0/8 D position 86 - 94 (53 - 58) 51 - 59 (32 - 37)
3rd position 86 - 94 (53 - 58) 83 - 91 (52 - 57)

AIR BREATHER HOSE
AT-237
D
E
F
G
H
I
J
K
L
MA
B
AT

For VQ23DE engine models
SCIA2589E
1. Air duct 2. Resonator 3. Air breather hose (air duct side)
4. Oil catch tank

AT-238
AIR BREATHER HOSE

REMOVAL AND INSTALLATION (QR20DE ENGINE MODELS)
During removal and installation of air breather hose (air duct side) be careful of the following.

Secure a mark (A) when installing air breather hose (air duct
side) to air duct so as to see the mark.

Install air breather hose (air duct side) to oil catch tank with a
mark (B) facing up. Insert air breather hose into oil catch tank
until it reaches the point where the winding radius stops.
CAUTION:
When installing an air breather hose (air duct side), be careful
not to be crushed or blocked by folding or bending the hose.
REMOVAL AND INSTALLATION (VQ23DE ENGINE MODELS)
During removal and installation of air breather hose (air duct side) be careful of the following.

Secure a mark (A) when installing air breather hose (air duct
side) to air duct so as not to see the mark.

Install air breather hose (air duct side) to oil catch tank with a
mark (B) facing up. Insert air breather hose into oil catch tank
until it reaches the point where the winding radius stops.
SCIA3022E
SCIA3020E

AT-242
TRANSAXLE ASSEMBLY

COMPONENTS (FOR VQ23DE ENGINE MODELS)
REMOVAL
CAUTION:
Transaxle assembly it self cannot be removed from vehicle. Remove transaxle assembly and engine
assembly together from vehicle.
1. Disconnect the battery cable from negative terminal.
2. Remove exhaust front tube with power tool. Refer to EX-2, "
Removal and Installation" .
3. Remove rear plate cover from oil pan (upper). Refer to EM-26, "
OIL PAN AND OIL STRAINER" (QR
engine) or EM-145, "
OIL PAN AND OIL STRAINER" (VQ engine).
1. A/T fluid level gauge 2. O-ring 3. A/T fluid charging pipe
4. Engine mounting bracket (front) 5. Fluid cooler tube 6. Fluid cooler tube
7. Copper washer 8. Copper washer 9. A/T assembly
10. Stopper 11. Engine mounting insulator (LH) 12. Engine mounting bracket (rear)
Refer to GI section to make sure icons (symbol marks) in the figure. Refer to GI-10, "
Components" .
However, refer to the following symbols for others.
: For tightening torque, refer to AT-244, "
INSTALLATION" .
SCIA7838E