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
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
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
-
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
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
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
)
OK
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