Lexus ES300 (2002 year). Manual — part 335

BR3904

ON

OFF

0.13 sec.

0.13 sec.

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DIAGNOSTICS

ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT]

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2002 LEXUS ES300 REPAIR MANUAL (RM911U) Corrected - 8/05/02 - MH

(6)

Switch the hand-held tester from the normal mode
to the check mode (Check that the MIL flashes).

(7)

Start the engine (MIL goes off after the engine
starts).

(8)

Simulate the conditions of the malfunction de-
scribed by the customer.

NOTICE:
Leave the ignition switch ON until you have checked the
DTCs, etc.

(9)

After simulating the malfunction conditions, use the
hand-held tester diagnosis selector to check the
DTCs and freeze frame data, etc.

HINT:
Take care not to turn the ignition switch OFF, as turning it OFF
switches the diagnosis system from the check mode to the nor-
mal mode, which erases all the DTCs, etc.

(10) After checking the DTC, inspect the applicable cir-

cuit.

(b)

Clear the DTC.
(1)

When using OBD II scan tool or hand-held tester:
When operating an OBD II scan tool (complying
with SAE J1978) or hand-held tester to erase the
codes, the DTCs and freeze frame data will be
erased. (See the OBD II scan tool’s instruction book
for operating instructions.)

(2)

When not using OBD II scan tool or hand-held tes-
ter:
Remove the EFI and ETCS fuse from engine room
J/B for 60 seconds or more.

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DIAGNOSTICS

ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT]

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2002 LEXUS ES300 REPAIR MANUAL (RM911U)

4.

DATA LIST

HINT:
According to the DATA LIST displayed by the OBD II scan tool or Hand-held tester, you can read the value
of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as a first step of
troubleshooting is one of the method to shorten the labor time.
(a)

Warm up the engine.

(b)

Turn the ignition switch OFF.

(c)

Connect the OBD II scan tool or Hand-held tester to the DLC3.

(d)

Turn the ignition switch ON.

(e)

According to the display on tester, read the ”DATA LIST”.

Item

Measurement Item/

Display (Range)

Normal Condition

Diagnostic Note

STOP LIGHT SW

Stop light SW Status/

ON or OFF

Brake Pedal is depressed: ON

Brake Pedal is released: OFF

←

SHIFT

Actual Gear Position/

1st, 2nd, 3rd, 4th or 5th

Shift Lever Position is;

L: 1st

2: 1st or 2nd

3: 1st, 2nd or 3rd

4: 1st, 2nd, 3rd or 4th

D: 1st, 2nd, 3rd, 4th or 5th

←

LOCK UP SOL

Lock Up Solenoid Status/

ON or OFF

Lock Up: ON

Except Lock Up: OFF

←

PNP SW [NSW]

PNP SW Status/

ON or OFF

Shift lever position is;
P or N: ON
Except P or N: OFF

REVERSE

PNP SW Status/

ON or OFF

Shift lever position is;
R: ON
Except R: OFF

5TH/DRIVE

PNP SW Status/

ON or OFF

Shift lever position is;
D and 4: ON
Except D and 4: OFF

Th

hift l

iti

d th

4th

PNP SW Status/

ON or OFF

Shift lever position is;
4: ON
Except 4: OFF

The shift lever position and these

values are different, there are fail-

ures of the PNP switch or shift

cable adjustment

3rd

PNP SW Status/

ON or OFF

Shift lever position is;
3: ON
Except 3: OFF

cable adjustment.

2ND

PNP SW Status/

ON or OFF

Shift lever position is;
2 and L: ON
Except 2 and L: OFF

LOW

PNP SW Status/

ON or OFF

Shift lever position is;
L: ON
Except L: OFF

SOLENOID (SLT)

Shift Solenoid SLT Status/

ON or OFF

IG SW ON: ON

←

AT FLUID TEMP

ATF Temp. Sensor Value/

min.: -40

C (-40

F)

max.: 225

C (437

F)

80

C (176

F)

(After Stall Test)

If the value is ”-40

C (-40

F)” or

”225

C (437

F)”, ATF temp. sen-

sor circuit is opened or shorted.

SPD (NC)

Counter Gear Speed

display: 50 r/min

D Position is warmed up, 3rd;
Same as input shaft speed

←

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DIAGNOSTICS

ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT]

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2002 LEXUS ES300 REPAIR MANUAL (RM911U) Corrected - 8/05/02 - MH

5.

ACTIVE TEST

HINT:
Performing the ACTIVE TEST using the OBD II scan tool or Hand-held tester allows the relay, VSV, actuator
and so on to operate without parts removal. Performing the ACTIVE TEST as a first step of troubleshooting
is one of the method to shorten the labor time.
It is possible to display the DATA LIST during the ACTIVE TEST.
(a)

Warm up the engine.

(b)

Turn the ignition switch OFF.

(c)

Connect the OBD II scan tool or Hand-held tester to the DLC3.

(d)

Turn the ignition switch ON.

(e)

According to the display on tester, perform the ”ACTIVE TEST”.

Item

Test Details

Diagnostic Note

SHIFT

[Test Details]
Operate the shift solenoid valve and set the each shift position by your-
self.
[Vehicle Condition]
Less than 50 km/h (31 mph)
[Others]

Press

→

button: Shift up

Press

←

button: Shift down

Possible to check the operation of

the shift solenoid values.

LOCK UP

[Test Details]
Control the shift solenoid DSL to set the ATM to the lock-up condition.
[Vehicle Condition]
Vehicle Speed: 58 km/h (36 mph) or more

Possible to check the DSL opera-

tion.

LINE PRESS UP

[Test Details]
Operate the shift solenoid SLT and raise the line pressure.
[Vehicle Condition]

Vehicle Stopped.

IDL: ON

[Others]
ON: Line pressure up.
OFF: No action (normal operation)

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6.

PROBLEM SYMPTOM CONFIRMATION

(a)

Taking into consideration the results of the customer problem analysis, try to reproduce the symptoms
of the trouble. If the problem is that the transaxle does not shift up, shift down, or the shift point is too
high or too low conduct the following road test referring to the automatic shift schedule and simulate
the problem symptoms.

7.

ROAD TEST

NOTICE:
Perform the test at the ATF temperature 50 - 80

°

C (122 - 176

°

F) in the normal operation.

(a)

D position test:
Shift into the D position and fully depress the accelerator pedal and check the following points.
(1)

Check up-shift operation.
Check to see that 1

→

2, 2

→

3, 3

→

4 and 4

→

5th up-shifts take place, and that the shift points

conform to the automatic shift schedule (See page

03-38

).

HINT:

5th Gear Up-shift Prohibition Control (1. Coolant temp. is 55

°

C (128

°F

) or less. 2. Vehicle speed is

51 km/h (32 mph) or less.)

5th Gear Lock-up Prohibition Control (1. Brake pedal is depressed. 2. Coolant temp. is 60

°

C (140

°F

) or less.)

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DIAGNOSTICS

ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT]

547

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

(2)

Check for shift shock and slip.
Check for shock and slip at the 1

→

2, 2

→

3, 3

→

4 and 4

→

5th up-shifts.

(3)

Check for abnormal noises and vibration.
Drive in the D position lock-up or 5th gear and check for abnormal noises and vibration.

HINT:
The check for the cause of abnormal noises and vibration must be done very thoroughly as it could also be
due to loss of balance in the differential, torque converter clutch, etc.

(4)

Check kick-down operation.
While running in the D position, 2nd, 3rd, 4th and 5th gears, check to see that the possible kick-
down vehicle speed limits for 2

→

1, 3

→

2, 4

→

3 and 5th

→

4 kick-downs conform to those

indicated on the automatic shift schedule (See page

03-38

).

(5)

Check abnormal shock and slip at kick-down.

(6)

Check the lock-up mechanism.

Drive in D position 5th gear, at a steady speed (lock-up ON).

Lightly depress the accelerator pedal and check that the engine speed does not change
abruptly.

If there is a big jump in engine speed, there is no lock-up.
(b)

4 position test:
Shift into the 4 position and fully depress the accelerator pedal and check the following points.
(1)

Check up-shift operation.
Check to see that the 1

→

2, 2

→

3 and 3

→

4 up-shift takes place and that the shift point con-

forms to the automatic shift schedule (See page

03-38

).

HINT:
There is no 5th up-shift in the 4 position.

(2)

Check engine braking.
While driving in the 4 position and 4th gear, release the accelerator pedal and check the engine
braking effect.

(3)

Check for abnormal noises during acceleration and deceleration, and for shock at up-shift and
down-shift.

(c)

3 position test:
Shift into the 3 position and fully depress the accelerator pedal and check the following points.
(1)

Check up-shift operation.
Check to see that the 1

→

2 and 2

→

3 up-shift takes place and that the shift point conforms to

the automatic shift schedule (See page

03-38

).

(2)

Check engine braking.
While running in the 3 position and 3rd gear, release the accelerator pedal and check the engine
braking effect.

(3)

Check for abnormal noises during acceleration and deceleration, and for shock at up-shift and
down-shift.

(d)

2 position test:
Shift into the 2 position and fully depress the accelerator pedal and check the following points.
(1)

Check up-shift operation.
Check to see that the 1

→

2 up-shift takes place and that the shift point conforms to the automatic

shift schedule (See page

03-38

).

(2)

Check engine braking.
While running in the 2 position and 2nd gear, release the accelerator pedal and check the engine
braking effect.

(3)

Check for abnormal noises during acceleration and deceleration, and for shock at up-shift and
down-shift.