Nissan Terrano model r20 series 2004. Instruction — part 211
8. Move selector lever to “N” position.
9. Cool off ATF.
I
Run engine at idle for at least one minute.
10. Repeat steps 5 through 9 with selector lever in “2”, “1” and “R”
positions.
JUDGEMENT OF STALL TEST
The test result and possible damaged components relating to each result are shown in the illustration.
In order to pinpoint the possible damaged components, follow the WORK FLOW as shown in AT-26.
Note
Stall revolution is too high in “D” or “2” position:
I
Slippage occurs in 1st gear but not in 2nd and 3rd gears. . . Low one-way clutch slippage
I
Slippage occurs at the following gears:
1st through 3rd gears in “D” position and engine brake functions.
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:
I
Engine brake does not function in “1” position. . . Low & reverse brake slippage
I
Engine brake functions in “1” position. . . Reverse clutch slippage
Stall revolution within specifications:
I
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.
I
Slippage occurs in 3rd and 4th gears in “D” position. . . High clutch slippage
I
Slippage occurs in 2nd and 4th gears in “D” position. . . Brake band slippage
Stall revolution less than specifications:
I
Poor acceleration during starts. . . One-way clutch seizure in torque converter
SAT771B
TROUBLE DIAGNOSIS — Basic Inspection
Stall Test (Cont’d)
AT-28
JUDGEMENT OF STALL TEST
SAT392H
TROUBLE DIAGNOSIS — Basic Inspection
Stall Test (Cont’d)
AT-29
Line Pressure Test
LINE PRESSURE TEST PORTS
I
Location of line pressure test ports.
I
Always replace line pressure plugs as they are self-
sealing bolts.
LINE PRESSURE TEST PROCEDURE
1. Check A/T and engine fluid levels. If necessary, add fluid.
2. Drive vehicle for approx. 10 minutes or until engine oil and ATF
reach operating temperature.
ATF operating temperature:
50 - 80°C (122 - 176°F)
3. Install pressure gauge to corresponding line pressure port.
SAT209GA
SAT647B
SAT518GB
SAT519GA
TROUBLE DIAGNOSIS — Basic Inspection
AT-30
4. Set parking brake and block wheels.
I
Continue to depress brake pedal fully while line pressure
test is being performed at stall speed.
5. Start engine and measure line pressure at idle and stall speed.
I
When measuring line pressure at stall speed, follow the
stall test procedure.
Line pressure:
Refer to SDS, AT-201.
JUDGEMENT OF LINE PRESSURE TEST
Judgement
Suspected parts
At idle
Line pressure is low in all
positions.
I
Oil pump wear
I
Control piston damage
I
Pressure regulator valve or plug sticking
I
Spring for pressure regulator valve damaged
I
A/T fluid pressure leakage between oil strainer and pressure regulator valve
I
Clogged strainer
Line pressure is low in par-
ticular position.
I
Fluid pressure leakage between instruction valve and particular clutch
I
For example, line pressure is:
— Low in “R” and “1” positions,
— Normal in “D” and “2” positions.
Then, fluid leakage exists at or around low and reverse brake circuit.
Refer to “CLUTCH AND BAND CHART”, AT-11.
Line pressure is high.
I
Mal-adjustment of throttle position sensor
I
A/T fluid temperature sensor damaged
I
Line pressure solenoid valve sticking
I
Short circuit of line pressure solenoid valve circuit
I
Pressure modifier valve sticking
I
Pressure regulator valve or plug sticking
I
Open in dropping resistor circuit
At stall speed
Line pressure is low.
I
Mal-adjustment of throttle position sensor
I
Line pressure solenoid valve sticking
I
Short circuit of line pressure solenoid valve circuit
I
Pressure regulator valve or plug sticking
I
Pressure modifier valve sticking
I
Pilot valve sticking
SAT513G
SAT493G
TROUBLE DIAGNOSIS — Basic Inspection
Line Pressure Test (Cont’d)
AT-31
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст