1986 TOYOTA CAMRY V20 brake

Mechanical System Tests
STALL TEST
The object of this test is to check the overall performance of the transaxle and engine by measur-
ing the stall speeds in the D and R ranges.
CAUTION:
wPerform the test at normal operation fluid temperature (122 ± 176°F or 50 ± 80°C).
wDo not continuously run this test longer than 5 seconds.
wTo ensure safety, conduct this test in a wide, clear, level area, which provides good traction.
wThe stall test should always be carried out in pairs. One should observe the conditions of wheels
or wheel stoppers outside the vehicle while the other is performing the test.
MEASURE STALL SPEED
(a) Chock the front and rear wheels.
(b) Connect a tachometer to the engine.
(c) Fully apply the parking brake.
(d) Step down strongly on the brake pedal with your left foot.
(e) Start the engine.
(f) Shift into the D range. Step all the way down on the accelerator pedal with your right foot. Quickly
read the stall speed at this time.
Stall speed: 2,200
+150 rpm
(g) Perform the same test in R range.
EVALUATION
(a) If the stall speed is the same for both ranges without the rear wheels rotating but lower than specified
value:
wEngine output may be insufficient
w Stator one±way clutch is not operating properly
(b) If the stall speed in D range is higher than specified:
wLine pressure too low
wForward clutch slipping
wNo. 2 one±way clutch not operating properly
wO/D one±way clutch not operating properly
(c) If the stall speed in R range is higher than specified:
wLine pressure too low
wDirect clutch slipping
wFirst and reverse brake slipping
wO/D one±way clutch not operating properly
(d) If the stall speed in both R and D ranges are higher than specified:
wLine pressure too low
wImproper fluid level
wO/D one±way clutch not operating properly
± AUTOMATIC TRANSAXLETroubleshooting (Mechanical System Tests) (A140L and
A140E)AT±38

TIME LAG TEST
When the shift lever is shifted while the engine is idling, there will be a certain time elapse or lag
before the shock can be felt. This is used for checking the condition of the O/D direct clutch, for-
ward clutch, direct clutch and first and reverse brake.
NOTICE:
wPerform the test at normal operating fluid temperature (122 ±176°F or 50 ± 80°C).
wBe sure to allow one minute interval between tests.
wMake three measurements and take the average value.
MEASURE TIME LAG
(a) Fully apply the parking brake.
(b) Start the engine and check the idle speed.
Idle speed (N range) : 700 rpm
(c) Shift the shift lever from N to D position. Using a stop watch, measure the time it takes from shifting
the lever until the shock is felt.
Time lag: Less than 1.2 seconds
(d) In the same manner, measure the time lag for N ± R.
Time lag: Less than 1.5 seconds
EVALUATION
(a) If N ± D time lag is longer than specified:
wLine pressure too low
wForward clutch worn
wO/D one±way clutch not operating properly
(b) If N ± R time lag is longer than specified:
wLine pressure too low
wDirect clutch worn
wFirst and reverse brake worn
wO/D one±way clutch not operating properly
± AUTOMATIC TRANSAXLETroubleshooting (Mechanical System Tests) (A140L and
A140E)AT±39

HYDRAULIC TEST
PREPARATION
(a) Warm up the transaxle fluid.
(b) Remove the transaxle case test plug and connect the hydraulic pressure gauge.
SST 09992±00094 (Oil pressure gauge)
NOTICE:
wPerform the test at normal operating fluid temperature (122 ±176°F or 50 ± 80°C).
wThe line pressure test should always be carried out in pairs. One should observe the conditions
of wheels or wheel stoppers outside the vehicle while the other is performing the test.
MEASURE LINE PRESSURE
(a) Fully apply the parking brake and chock the four wheels.
(b) Start the engine and check idling rpm.
(e) Step down strongly on the brake pedal with your left foot and shift into D range.
(d) Measure the line pressure when the engine is idling.
(e) Press the accelerator pedal all the way down. Quickly read the highest line pressure when engine
speed reaches stall speed.
(f) In the same manner, perform the test in R range.
If the measured pressure are not up to specified values, recheck the throttle cable adjustment and
perform a retest.
kg/cm (psi, kPa)
Line pressure
R range D range
Idling
IdlingStall
Stall
± AUTOMATIC TRANSAXLETroubleshooting (Mechanical System Tests) (A140L and
A140E)AT±40

EVALUATION
(a) If the measured values at all ranges are higher than specified:
wThrottle cable out of adjustment
w4 Throttle valve defective
Regulator valve defective
(b) If the measured values at all ranges are lower than specified:
wThrottle cable out of adjustment
wThrottle valve defective
wRegulator valve defective
wOil pump defective
wO/D direct clutch defective
(c) If pressure is low in the D range only:
wD range circuit fluid leakage
wForward clutch defective
(d) If pressure is low in the R range only:
wR range circuit fluid leakage
wDirect clutch defective
wFirst and reverse brake defective
± AUTOMATIC TRANSAXLETroubleshooting (Mechanical System Tests) (A140L and
A140E)AT±41

MEASURE GOVERNOR PRESSURE (A1401)
(a) Check the parking brake to see that it is not applied.
(b) Start the engine.
(c) Shift into D range and measure the governor pressures at the speeds specified in the table.
EVALUATION
If governor pressure is defective:
wLine pressure defective
wFluid leakage in governor pressure circuit
wGovernor valve operation defective .
Vehicle speed (Reference only)
Drive pinion shaftGovernor pressure
± AUTOMATIC TRANSAXLETroubleshooting (Mechanical System Tests) (A140L and
A140E)AT±42

2. 2 RANGE TEST
Shift into the 2 range and, while driving with the accel-
erator pedal held constantly at the full throttle valve
opening position, push in one of the pattern selectors
and check on the following points.
(a) Check to see that the 1 ±2 up±shift takes place and
that the shift point conforms to it shown on the auto-
matic shift schedule. (See page AT±49)
(b) White running in the 2 range and 2nd gear, re-
lease the accelerator pedal and check the en-
gine braking effect.
EVALUATION
If there is no engine braking effect:
wSecond coast brake is defective (d) While running in the D range, 2nd, 3rd and O/D
gears, check to see that the possible kick±
down vehicle speed limits for 2 ±1, 3 ±2 and O/D
±3 kickdowns conform to those indicated on the
automatic shift schedule. (See page AT±49)
(e) Check for abnormal shock and slip at kick±down.
(f) Check for the lock±up mechanism:
(1) Drive in D range ± O/D gear, at a steady speed
(lock±up ON) of about 75 km/h (47 mph).
(2) Lightly depress the. accelerator pedal and check
that the engine rpm does not change abruptly.
If there is a big jump in engine rpm, there is no
lock±up.
(e) Check for abnormal noise at acceleration and
deceleration, and for shock at up±shift and
downshift.
± AUTOMATIC TRANSAXLETroubleshooting (Mechanical System Tests) (A140L and
A140E)AT±44

(b) White running in the L range, release the acceler-
ator pedal and check the engine braking effect.
EVALUATION
If there is no engine braking effect:
First and reverse brake is defective
5. P RANGE TEST
Stop the vehicle on a gradient (more than 5
°) and after
shifting into the P range, release the parking brake.
Then check to see that the parking lock pawl holds the vehicle
in place.
3. L RANGE TEST
(a) White running in the L range, check to see that there is
no up±shift to 2nd gear.
4. R RANGE TEST
Shift into the R range and, while starting at full throttle,
check for slipping.(c) Check for abnormal noise during acceleration
and deceleration.
± AUTOMATIC TRANSAXLETroubleshooting (Mechanical System Tests) (A140L and
A140E)AT±45

2. 2 RANGE TEST
Shift into the .2 range and, while driving with the accel-
erator pedal held constantly at the full throttle valve
opening position, check on the following points.
(a) Check to see that the 1 ± 2 up±shift takes place and
that the shift point conforms to it shown on the auto-
matic shift schedule. (See page AT±49) (f) Check for the lock±up mechanism.
(1) Drive in D range, O/D gear, at a steady speed
(lock±up ON) of about 70 km/h (43 mph).
(2) Lightly depress the accelerator pedal and check
that the engine rpm does. not change abruptly.
If there is a big jump in engine rpm, there is no
lock±up.
(b) While running in the 2 range and 2nd gear, re-
lease the accelerator pedal and check the en-
gine braking effect.
EVALUATION
If there is no engine braking effect:
Second coast brake is defective (d) While running in the D range, 2nd, 3rd and O/D
gears, check to see that the possible kick±
down vehicle speed limits for 2 ±1, 3 ±2 and
O/D ± 3 kickdowns conform to those indicated
on the automatic shift schedule. (See page
AT±49)
(e) Check for abnormal shock and slip at kick±down.
(c) Check for abnormal noise at acceleration and de-
celeration, and for shock at up±shift and down-
shift.
± AUTOMATIC TRANSAXLETroubleshooting (Mechanical System Tests) (A140L and
A140E)AT±47