Lexus ES300 (2002 year). Manual - part 327

D25466

1

2

1

2

(+)

(-)

C90639

(+)

(-)

-

DIAGNOSTICS

ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT]

05-427

580

2002 LEXUS ES300 REPAIR MANUAL   (RM911U)

7

INSPECT SHIFT SOLENOID VALVE SL3

(a)

Remove the shift  solenoid valve SL3.

(b)

Measure the resistance between terminals.
OK:
Resistance: 5.0 - 5.6 

Ω

 at 20

°

C (68

°

F)

(c)

Connect the positive (+) lead with a 21 W bulb to terminal
2 and the negative (-) lead to terminal 1 of the solenoid
valve connector, then check the movement of the valve.
OK:
The solenoid makes an operating noise.

NG

REPLACE SHIFT SOLENOID VALVE SL3

OK

REPAIR OR REPLACE TRANSMISSION WIRE(See page 

01-31

)

8

INSPECT SHIFT SOLENOID VALVE S4

(a)

Remove the shift solenoid valve S4.

(b)

Measure the resistance between the solenoid connector
and the solenoid body.
OK:
Resistance: 11 - 15 

Ω

 at 20

°

C (68

°

F)

(c)

Connector positive (+) lead to the terminal of solenoid
connector, negative (-) lead to the solenoid body.
OK:
The solenoid makes an operating noise.

NG

REPLACE SHIFT SOLENOID VALVE S4

OK

REPAIR OR REPLACE TRANSMISSION WIRE(See page 

01-31

)

C90640

(+)

(-)

05-428

-

DIAGNOSTICS

ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT]

581

2002 LEXUS ES300 REPAIR MANUAL   (RM911U)

9

INSPECT SHIFT SOLENOID VALVE SR

(a)

Remove the shift solenoid valve SR.

(b)

Measure the resistance between the solenoid connector
and the solenoid body.
OK:
Resistance: 11 - 15 

Ω

 at 20

°

C (68

°

F)

(c)

Connector positive (+) lead to the terminal of solenoid
connector, negative (-) lead to the solenoid body.
OK:
The solenoid makes an operating noise.

NG

REPLACE SHIFT SOLENOID VALVE SR

OK

REPAIR OR REPLACE TRANSMISSION WIRE(See page 

01-31

)

-

DIAGNOSTICS

ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT]

05-429

582

2002 LEXUS ES300 REPAIR MANUAL   (RM911U)

DTC

P0770

SHIFT SOLENOID E MALFUNCTION

SYSTEM DESCRIPTION

The ECM uses the signals from the throttle position sensor, Air-flow meter and crankshaft position sensor
to monitor the engagement condition of the lock-up clutch.
Then the ECM compares the engagement condition of the lock-up clutch with the lock-up schedule in the
ECM memory to detect a mechanical trouble of the shift solenoid valve DSL, valve body and torque converter
clutch.

DTC No.

DTC Detection Condition

Trouble Area

P0770

Lock-up does not occur when driving in lock-up range (normal
driving at 80 km/h 

[

50 mph

]

), or lock-up remains ON in lock-

up OFF range (2 trip detection logic)

Open or short in shift solenoid valve DSL circuit

Shift solenoid valve DSL

Valve body blocked or stuck

Lock-up clutch

ECM

INSPECTION PROCEDURE

1

PERFORM ACTIVE TEST BY OBD II SCAN TOOL OR HAND-HELD TESTER

(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 and push the OBD II scan tool or Hand-held tester main SW ON.

(e)

Select the item ”LOCK UP” in the ACTIVE TEST and operate the Lock-up solenoid valves on the OBD
II scan tool or Hand-held tester.

NOTICE:
The values given below for ”Normal Condition” are representative values, so a vehicle may still be
normal even if its value differs from those listed here. Do not depend solely on the ”Normal Condi-
tion” here when deciding whether or not the part is faulty.

Item

Test Details

Diagnostic Note

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.

OK

CHECK AND REPLACE ECM(See page 

01-31

)

NG

056ER-01

C93266

E1

E2

DSL

C82158

C91565

DSL

E1

05-430

-

DIAGNOSTICS

ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT]

583

2002 LEXUS ES300 REPAIR MANUAL   (RM911U)

2

INSPECT TRANSMISSION WIRE(DSL)

(a)

Disconnect the transmission wire connector (E1) from the
transaxle.

(b)

Measure resistance between the terminal DSL and body
ground.
OK:
Resistance: 11 - 13

 Ω

 at 20 



C (68 



F)

NG

Go to step 4

OK

3

CHECK HARNESS AND CONNECTOR(TRANSMISSIONWIRE WIRE - ECM)

(a)

Connect the transmission wire connector.

(b)

Disconnect the ECM connector.

(c)

Measure the resistance between terminals DSL and E1.
OK:
Resistance: 11 - 13

 Ω

 at 20 



C (68 



F)

NG

REPAIR OR REPLACE HARNESS OR
CONNECTOR(See page 

01-31

)

OK