Lexus ES300 (2002 year). Manual — part 353
F41648
Absorber Control ECU
Left Front Absorber
Control Actuator
A8
L-Y
L-W
L
L-B
FAL+
FAL-
FBL+
FBL-
A21
3
1
2
7
4
5
W-B
ED
A21
A21
A21
2
3
1
A21
A21
A21
A21
4
5
L-Y
L-W
L
L-B
4
5
2
3
Right Front Absorber
Control Actuator
A9
W-B
EB
1
12
6
FAR+
FAR-
FBR+
FBR-
Left Rear Absorber
Control Actuator
A38
4
5
W-B
2
3
1
L-R
R-W
R-Y
R
L-R
R-W
R-Y
R
5
6
15
16
ID1
ID1
ID1
ID1
A22
A22
A22
A22
10
8
9
7
W-B
RAL+
RAL-
RBL+
RBL-
A
A
BC
BA
J12
J/C
Right Rear Absorber
Control Actuator
A39
4
5
W-B
2
3
1
W-B
A
A
BD
BB
J13
J/C
L-R
R-W
R-Y
R
10
12
11
13
L-R
R-W
R-Y
R
L-R
R-W
R-Y
R
A22
A22
A22
A22
26
12
13
11
9
11
10
12
IF2
IO5
IF2
IF2
IF2
IO5
IO5
IO5
RAR+
RAR-
RBR+
RBR-
-
DIAGNOSTICS
ELECTRONIC MODULATED SUSPENSION SYSTEM
05-21 1
364
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
WIRING DIAGRAM
C52361
Ts
CG
DLC3:
05-212
-
DIAGNOSTICS
ELECTRONIC MODULATED SUSPENSION SYSTEM
365
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
INSPECTION PROCEDURE
1
INSPECT ABSORBER CONTROL ACTUATOR OPERATION
In case of using hand-held tester:
(a)
Connect the hand-held tester to the DLC3.
(b)
Turn the ignition switch to ON and turn the hand-held tester main switch to ON.
(c)
Select the item ”DAMPER STEP FR (FL, RR, RL)” in the ACTIVE TEST and operate the absorber con-
trol actuator on the hand-held tester.
(d)
Check whether or not the absorber control actuator operates to harden or soften the suspension with
the hand-held tester.
OK:
The absorber control actuator operates to harden or soften the suspension.
In case of not using hand-held tester:
(a)
Using SST, connect terminals Ts and CG of the DLC3 with
the ignition switch to OFF (TEST mode).
SST
09843-18040
(b)
Start the engine.
(1)
Under this condition, the absorber control actuator
position becomes 1 (Soft).
(c)
Starting from the above mentioned position, as the brake
pedal is depressed, the absorber control actuator position
increase (1
→
2
→
3
→
... 15
→
16).
At this time, bounce the vehicle and check that the shock
absorber is becoming harder.
OK:
The absorber control actuator operates.
NG
OK
CHECK AND REPLACE ABSORBER CONTROL ECU(See page
C91056
Front:
C91056
Rear:
-
DIAGNOSTICS
ELECTRONIC MODULATED SUSPENSION SYSTEM
05-213
366
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
2
INSPECT ABSORBER CONTROL ACTUATOR
Front absorber control actuator:
(a)
Disconnect the absorber control actuator connector.
(b)
Measure the resistance between each terminal of the
front absorber control actuator.
OK:
Terminal
Resistance
A8 or A9 - 1 and A8 or A9 - 2
13.4 - 15.0
Ω
A8 or A9 - 1 and A8 or A9 - 3
13.4 - 15.0
Ω
A8 or A9 - 1 and A8 or A9 - 4
13.4 - 15.0
Ω
A8 or A9 - 1 and A8 or A9 - 5
13.4 - 15.0
Ω
Rear absorber control actuator:
(a)
Disconnect the absorber control actuator connector.
(b)
Measure the resistance between each terminal of the
front absorber control actuator.
OK:
Terminal
Resistance
A42 or A43 - 1 and A42 or A43 - 2
13.4 - 15.0
Ω
A42 or A43 - 1 and A42 or A43 - 3
13.4 - 15.0
Ω
A42 or A43 - 1 and A42 or A43 - 4
13.4 - 15.0
Ω
A42 or A43 - 1 and A42 or A43 - 5
13.4 - 15.0
Ω
NG
REPLACE SHOCK ABSORBER ASSY FRONT
RH
NG
REPLACE SHOCK ABSORBER ASSY FRONT
LH
NG
REPLACE SHOCK ABSORBER ASSY REAR RH
NG
REPLACE SHOCK ABSORBER ASSY REAR LH
OK
3
CHECK HARNESS AND CONNECTOR(ABSORBER CONTROL ACTUATOR -
ABSORBER CONTROLL ECU)
(a)
Check for open and short circuit in harness and connector between each absorber control actuator
and absorber control ECU (See page
).
NG
REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
CHECK AND REPLACE ABSORBER CONTROL ECU(See page
051LP-07
-
DIAGNOSTICS
SFI SYSTEM (1MZ-FE)
05-1
154
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
SFI SYSTEM (1MZ-FE)
HOW TO PROCEED WITH TROUBLESHOOTING
1
VEHICLE BROUGHT TO WORKSHOP
2
CUSTOMER PROBLEM ANALYSIS (See page
3
CONNECT THE HAND-HELD TESTER TO DLC3
HINT:
If the display indicates a communication fault in the tool, inspect DLC3.
4
CHECK DTC AND FREEZED FRAME DATA
(See page
HINT:
Record or print DTC and Freezed Frame Data, if needed.
5
CLEAR DTC AND FREEZED FRAME DATA (See page
)
6
VISUAL INSPECTION
7
SETTING THE CHECK (TEST) MODE DIAGNOSIS (See page
8
PROBLEM SYMPTOM CONFIRMATION
HINT:
If the engine does not start, perform step 10 and 12 first.
A
Malfunction does not occur
B
Malfunction occurs
B
GO TO STEP 10
A
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