Lexus ES300 (1997 year). Manual — part 357
W03870
FB–
(+)
RB+
FA+
FA–
RA+
FB+
RB–
RA–
(–)
–
DIAGNOSTICS
ELECTRIC MODULATED SUSPENSION
DI–205
357
1997 LEXUS ES300 (RM511U)
INSPECTION PROCEDURE
1
Check operation of absorber control actuator.
CHECK:
Using the same method as used for the clamping force control, check that clamping force of the absorber
control actuator changes.
OK:
Bounce the vehicle and check that the shock absorber is becoming harder.
OK
Proceed to next circuit inspection shown on
problem symptoms table (See page
NG
2
Check continuity between terminals RB–, RB+, RA–, RA+, FB–, FB+, FA– and FA+
of absorber control ECU connector and body ground.
PREPARATION:
Remove the No.1 lower panel (See page
).
CHECK:
Check continuity between terminals RB–, RB+, RA–, RA+,
FB–, FB+, FA–, and FA+ of absorber control ECU connector
and body ground.
OK:
Continuity
NG
Check and replace absorber control ECU
OK
W03871
Rear LH
RH
A11
Front LH
Front or Rear Absorber Control
Actuator
A35 RH
A12
A36
1
2
3
4
5
W03872
1
Absorber Control
Sub–wire Harness
Absorber Control Actuator
2
3
5
4
Actuator
1
2
3
4
5
DI–206
–
DIAGNOSTICS
ELECTRIC MODULATED SUSPENSION
358
1997 LEXUS ES300 (RM511U)
3
Check absorber control actuator.
PREPARATION:
Front absorber control actuator:
(a)
Remove the shock absorber cap (See page
(b)
Remove the absorber control actuator connector.
Rear absorber control actuator:
(a)
Remove the rear seat cushion, rear seatback, roof side
inner garnish, high mounted stop light and seat belt.
(b)
Remove the absorber control actuator connector
(See page
).
CHECK:
Measure resistance between each terminal of front or rear ab-
sorber control actuator.
OK:
Front absorber control actuator:
Terminal A11 or A12 – 1 and A11 or A12 – 2
12.4 – 13.6
Ω
Terminal A11 or A12 – 1 and A11 or A12 – 3
12.4 – 13.6
Ω
Terminal A11 or A12 – 1 and A11 or A12 – 4
12.4 – 13.6
Ω
Terminal A11 or A12 – 1 and A11 or A12 – 5
12.4 – 13.6
Ω
Rear absorber control actuator:
Terminal A35 or A36 – 1 and A35 or A36 – 2
12.4 – 13.6
Ω
Terminal A35 or A36 – 1 and A35 or A36 – 3
12.4 – 13.6
Ω
Terminal A35 or A36 – 1 and A35 or A36 – 4
12.4 – 13.6
Ω
Terminal A35 or A36 – 1 and A35 or A36 – 5
12.4 – 13.6
Ω
CHECK:
Front absorber control actuator:
Check continuity between each terminal of absorber control ac-
tuator and sub–wire harness.
OK:
Terminals 1 and 4
Continuity
Terminals 2 and 5
Continuity
Terminals 3 and 1
Continuity
Terminals 4 and 2
Continuity
Terminals 5 and 3
Continuity
NG
Replace absorber control actuator or absorber
control actuator sub–wire harness.
OK
–
DIAGNOSTICS
ELECTRIC MODULATED SUSPENSION
DI–207
359
1997 LEXUS ES300 (RM511U)
4
Check harness and connectors between absorber control ECU and absorber
control actuator, absorber control actuator and body ground (See page
).
NG
Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown on
problem symptoms table
(See page
*: However, when DTC 21 or 23 is displayed, check and replace absorber control ECU.
DI–208
–
DIAGNOSTICS
ELECTRIC MODULATED SUSPENSION
360
1997 LEXUS ES300 (RM511U)
DTC
31
Acceleration Sensor Circuit
CIRCUIT DESCRIPTION
DTC No.
DTC Detecting Condition
Trouble Area
31
Acceleration sensor signal malfunction.
Absorber control ECU
(Acceleration sensor is a built–in the equipment)
INSPECTION PROCEDURE
As the deceleration sensor is a built–in the equipment for absorber control ECU, replace them as a unit.
DI0AJ–01
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