Lexus ES300 (2002 year). Manual — part 342
C90640
(+)
(-)
-
DIAGNOSTICS
ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT]
05-419
572
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
7
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.
OK
Go to step 8
NG
REPLACE SHIFT SOLENOID VALVE SR
8
INSPECT TRANSMISSION VALVE BODY ASSY
NG
REPAIR OR REPLACE TRANSMISSION VALVE
BODY ASSY(See page
OK
9
INSPECT TORQUE CONVERTER CLUTCH ASSY(See page
)
NG
REPLACE TORQUE CONVERTER CLUTCH
ASSY
OK
REPAIR AUTOMATIC TRANSAXLE ASSY(See page
056A4-01
05-190
-
DIAGNOSTICS
ELECTRONIC MODULATED SUSPENSION SYSTEM
343
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
ELECTRONIC MODULATED SUSPENSION SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
1
VEHICLE BROUGHT TO WORKSHOP
2
CUSTOMER PROBLEM ANALYSIS(See page
3
CHECK AND CLEAR DTCS(See page
4
PROBLEM SYMPTOM CONFIRMATION
SYMPTOM DOES NOT OCCUR(Go to step 5)
SYMPTOM OCCUR(Go to step 6)
5
SYMPTOM SIMULATION(See page
6
DTC CHECK(See page
)
NORMAL CODE(Go to step 7)
MALFUNCTION CODE(Go to step 8)
7
PROBLEM SYMPTOMS TABLE(See page
8
DTC CHART(See page
9
)
10
IDENTIFICATION OF PROBLEM
-
DIAGNOSTICS
ELECTRONIC MODULATED SUSPENSION SYSTEM
05-191
344
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
11
REPAIR
12
CONFIRMATION TEST
END
HINT:
Step 3, 6, 9, 12:
Diagnostic steps permitting the use of the hand-held tester.
F41649
Absorber Control ECU
Driver Side J/B
+B
GND
A22
1
14
B-R
2F
9
FAN RLY
IG1
3
5
AM1
2R
8
2
1
2
2E
2A
Relay
2A
2
8
A22
W-B
ED
IA
W-B
B-G
W
B-Y
4
2
I14
Ignition SW
Engine Room R/B
FL MAIN
IG1
AM1
ALT
B-G
1
1
1
2
B-G
Battery
05-214
-
DIAGNOSTICS
ELECTRONIC MODULATED SUSPENSION SYSTEM
367
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
DTC
C1774/74 POWER SOURCE CIRCUIT
CIRCUIT DESCRIPTION
When turning the ignition switch to ON, the battery positive voltage is input to +B terminal to absorber control
ECU. When turning the ignition switch to OFF, the battery positive voltage supply to +B terminal stops and
the power switched OFF.
DTC No.
DTC Detecting Condition
Trouble Area
C1774/74
The terminal +B voltage is detected being below or above a
constant voltage for 5 seconds.
Battery
Power source circuit
Absorber control ECU
WIRING DIAGRAM
056AC-01
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