Lexus ES300 (1997 year). Manual — part 345

Q04604

Q04700

Bolt

Neutral Basic Line

Groove

Bolt

–

DIAGNOSTICS

AUTOMATIC TRANSAXLE

DI–157

309

1997 LEXUS ES300 (RM511U)

(3)

Return the control shaft lever 2 notches to N posi-
tion.

(4)

Set the shift lever to N position.

(5)

While holding the shift lever lightly toward the R
position side, tighten the shift lever nut.

Torque:13 N·m (130 kgf·cm, 9 ft·lbf)
(6)

Start the engine and make sure that the vehicle
moves forward when shifting the lever from the N to
D position and reverses when shifting it to the R
position.

(g)

INSPECT AND ADJUST PARK/NEUTRAL POSITION
Check that the engine can be started with the shift lever
only in the N or P position, but not in other positions.
If it is not as stated above, carry out the following adjust-
ment procedure.
(1)

Loosen the park/neutral position switch bolt and set
the shift lever to the N position.

(2)

Align the groove and neutral basic line.

(3)

Hold in position and tighten the bolt.

Torque:5.4 N·m (55 kgf·cm, 48 in·lbf)

For continuity inspection of the park/neutral position
switch, see page

DI–185

.

(h)

CHECK IDLE SPEED
Idle speed: 700

±

50 rpm

(In N position and air conditioner OFF)

6.

MECHANICAL SYSTEM TESTS

(a)

MEASURE STALL SPEED
The object of this test is to check the overall performance of the transaxle and engine by measuring
the stall speeds in the D and R positions.

NOTICE:

Do the test at normal operating fluid temperature 50 – 80

°

C (122 – 176

°

F).

Do not continuously run this test longer than 5 seconds.

To ensure safety, conduct this test in a wide, clear level area which provides good traction.

The stall test should always be carried out in pairs. One technician should observe the conditions

of wheels or wheel stoppers outside the vehicle while the other is doing the test.

(1)

Chock the 4 wheels.

(2)

Connect an OBD II scan tool or LEXUS hand–held tester to DLC3.

(3)

Fully apply the parking brake.

(4)

Keep your left foot pressed firmly on the brake pedal.

(5)

Start the engine.

(6)

Shift into the D position. Press all the way down on the accelerator pedal with your right foot.
Quickly read the stall speed at this time.

Stall speed: 2,600

±

150 rpm

(7)

Do the same test in R position.

Stall speed: 2,600

±

150 rpm

DI–158

–

DIAGNOSTICS

AUTOMATIC TRANSAXLE

310

1997 LEXUS ES300 (RM511U)

Evaluation:

Problem

Possible cause

(a) Stall speed low in D and R positions

Engine output may be insufficient

Stator one–way clutch is operating properly

HINT: If more than 600 rpm below the specified value, the torque

converter could be faulty.

(b) Stall speed high in D position

Line pressure too low

Forward clutch slipping

No.2 one–way clutch not operating properly

O/D clutch slipping

(c) Stall speed high in R position

Line pressure too low

Direct clutch slipping

1st and reverse brake slipping

O/D clutch slipping

(d) Stall speed high in D and R positions

Line pressure too low

Improper fluid level

O/D one–way clutch not operating properly

(b)

MEASURE TIME LAG
When the shift lever is shifted while the engine is idling, there will be a certain time lapse or lag before
the shock can be felt. This is used for checking the condition of the O/D direct clutch, forward clutch,
and 1st and reverse brake.

NOTICE:

Do the test at normal operating fluid temperature 50 – 80

°

C (122 – 176

°

F).

Be sure to allow 1 minute interval between tests.

Take 3 measurements and take the average value.

(1)

Connect an OBD II scan tool or LEXUS hand–held tester to DLC3.

(2)

Fully apply the parking brake.

(3)

Start the engine and check idle speed.

Idle speed: 700

±

50 rpm (In N position and air conditioner OFF)

(4)

Shift the shift lever from N to D position. Using a stop watch, measure the time from when the
lever is shifted until the shock is felt.
In the same manner, measure the time lag for N

→

R.

Time lag:
N

→

D Less than 1.2 seconds

N

→

R Less than 1.5 seconds

Evaluation (If N

→

D time or N

→

R time lag is longer than specified):

Problem

Possible cause

N

→

D time lag is longer

Line pressure too low

Forward clutch worn

O/D one–way clutch not operating

N

→

R time lag is longer

Line pressure too low

Direct clutch worn

1st and reverse brake worn

O/D one–way clutch not operating properly

–

DIAGNOSTICS

AUTOMATIC TRANSAXLE

DI–159

311

1997 LEXUS ES300 (RM511U)

7.

HYDRAULIC TEST

(a)

MEASURE LINE PRESSURE

NOTICE:

Do the test at normal operation fluid temperature 50 – 80

°

C (122 – 176

°

F).

The line pressure test should always be carried out in pairs. One technician should observe the

conditions of wheels or wheel stoppers outside the vehicle while the other is doing the test.

Be careful to prevent SST’s hose from interfering with the exhaust pipe.

(1)

Warm up the ATF.

(2)

Remove the test plug on the transaxle case front left side and connect SST.
(See page

AX–18

for the location to connect SST)

SST

09992–00094 (09992–00230)

(3)

Fully apply the parking brake and chock the 4 wheels.

(4)

Connect an OBD II scan tool or LEXUS hand–held tester to DLC3.

(5)

Start the engine and check idling speed.

(6)

Keep your left foot pressed firmly on the brake pedal and shift into D position.

(7)

Measure the line pressure when the engine is idling.

(8)

Depress the accelerator pedal all the way down. Quickly read the highest line pressure when
engine speed reaches stall speed.

(9)

In the same manner, do the test in R position.

Specified line pressure:

Condition

D position kPa (kgf/cm

2

,

psi)

R position kPa (kgf/cm

2

,

psi)

Idling

401 – 461 (4.1 – 4.7, 58 – 66)

804 – 882 (8.2 – 9.0, 117 – 128)

Stall

1,138 – 1,236 (11.6 – 12.6, 165 – 179)

1,716 – 1,854 (17.5 – 18.9, 249 – 269)

If the measured pressure is not up to specified value, recheck the throttle cable adjustment and
retest.

Evaluation

Problem

Possible cause

If the measured values at all position are higher

Throttle cable out of adjustment

Throttle valve defective

Regulator valve defective

If the measured values at all position are lower

Throttle cable out of adjustment

Throttle valve defective

Regulator valve defective

Oil pump defective

O/D direct clutch defective

If pressure is low in the D position only

D position circuit fluid leakage

Forward clutch defective

If pressure is low in the R position only

R position circuit fluid leakage

Direct clutch defective

1st and reverse brake defective

Q00224

DI–160

–

DIAGNOSTICS

AUTOMATIC TRANSAXLE

312

1997 LEXUS ES300 (RM511U)

8.

MANUAL SHIFTING TEST

HINT:With this test, it can be determined whether the trouble is
within the electrical circuit or is a mechanical problem in the
transaxle.
(a)

DISCONNECT SOLENOID WIRE

(b)

INSPECT MANUAL DRIVING OPERATION
Check that the shift and gear positions correspond with
the table below.
While driving, shift through the L, 2 and D positions.
Check that the gear change corresponds to the shift posi-
tion.

Shift Position

Gear Position

D

O/D

2

O/D

L

1st

R

Reverse

P

Pawl Lock

HINT:If the L, 2 and D position gear positions are difficult to posi-
tions are difficult to distinguish, do the following read test.
If any abnormality is found in the above test, the problem is in
the transaxle itself.
(c)

CONNECT SOLENOID WIRE

(d)

CANCEL OUT DTC (See page

DI–150

).