Lexus ES300 (1997 year). Manual — part 356
DI0AF–01
W04370
Rear Absorber Control Actuators
Absorber Control Switch
Steering Sensor
Rear Speed Sensor Rotor
Rear Speed Sensor
Absorber Control ECU
(Acceleration Sensor is a built–in equipment)
Stop Light Switch
Front Absorber Control Actuators
DLC1
DLC2
ECM
Crankshaft Position Sensor
Front Speed
Sensor Ro-
tor
ABS ECU or ABS & TRAC ECU
Front Speed Sensor
–
DIAGNOSTICS
ELECTRIC MODULATED SUSPENSION
DI–201
353
1997 LEXUS ES300 (RM511U)
PARTS LOCATION
DI0AG–01
W03883
A24
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
DI–202
–
DIAGNOSTICS
ELECTRIC MODULATED SUSPENSION
354
1997 LEXUS ES300 (RM511U)
TERMINALS OF ECM
Symbols (Terminals No.)
STD Voltage (V)
Condition
GND (A24 – 1) – Body ground
Continuity
Always
+B (A24 – 2) – Body ground
10 – 14
IG switch ON
SW2 (A24
3)
B d
d
8 V or more
IG switch ON, Absorber control switch 1
SW2 (A24 – 3) – Body ground
Below 1.5
IG switch ON, Absorber control switch 2
TEM (A24 – 4) – Body ground
10 – 14
Connect between terminals TEM and E1 of DLC2 for 2 sec. after the
ignition
RB– (A24 – 5) – Body ground
RB+ (A24 – 6) – Body ground
RA– (A24 – 7) – Body ground
RA+ (A24 – 8) – Body ground
FB– (A24 – 10) – Body ground
FB+ (A24 – 11) – Body ground
FA– (A24 – 12) – Body ground
FA+ (A24 – 13) – Body ground
Continuity
Always
NEO (A24 – 14) – Body ground
1 – 8
Start the engine, run it at idle
SS1 (A24 – 16) – Body ground
1
3 5
IG
it h ON St
i
h
l i b i
t
d l
l
SS2 (A24 – 17) – Body ground
1 – 3.5
IG switch ON, Steering wheel is being turned slowly
RRO (A24 – 18) – Body ground
1.5 – 8
While driving
T (A24
19)
B d
d
Below 1.5
IG switch ON, Connect between terminals Ts and E1 of DLC1
Ts (A24 – 19) – Body ground
10 – 14
IG switch ON, Disconnect terminals Ts and E1 of DLC1
FRO (A24 – 20) – Body ground
1.5 – 8
While driving
SW1 (A24
21)
B d
d
Below 1.5
IG switch ON, Absorber control switch 3
SW1 (A24 – 21) – Body ground
8 V or more
IG switch ON, Absorber control switch 4
T (A24
22)
B d
d
Below 1.5
IG switch ON, Connect between terminals Tc and E1 of DLC1
Tc (A24 – 22) – Body ground
10 – 14
IG switch ON, Disconnect terminals Tc and E1 of DLC1
STP (A24
26)
B d
d
10 – 14
IG switch ON, Brake pedal is released
STP (A24 – 26) – Body ground
Below 1.5
IG switch ON, Brake pedal is depressed
DI0AH–01
–
DIAGNOSTICS
ELECTRIC MODULATED SUSPENSION
DI–203
355
1997 LEXUS ES300 (RM511U)
PROBLEM SYMPTOMS TABLE
If a normal code is displayed during the DTC check but the problem still occurs, check the circuits for each
problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.
Symptom
Inspection Circuit
See page
Damping force control do not operate at all
1. Absorber control actuator circuit
2. TEM terminal circuit
3. Tc terminal circuit
4. Ts terminal circuit
5. Shock absorber
6. Absorber control ECU
–
Only anti–roll control does not operate
1. Steering sensor circuit
2. Speed sensor circuit
3. Absorber control ECU
–
Only anti–squat control does not operate
1. Crankshaft position sensor circuit
2. Speed sensor circuit
3. Absorber control ECU
–
Only anti–dive control does not operate
1. Stop light switch circuit
2. Speed sensor circuit
3. Absorber control ECU
–
Only semi–active control does not operate
1. Speed sensor circuit
2. Absorber control ECU
(Deceleration sensor is a built–in equipment)
–
Only speed sensing control does not operate
1. Speed sensor circuit
2. Absorber control ECU
–
Only unsprung damping control does not operate
1. Speed sensor circuit
2. Absorber control ECU
–
DI0AI–01
W03885
12
Absorber Control
Left Front
Connector
Instrument Panel J/B
Right Rear
13
Absorber Control ECU
Junction
J3
Connector
Junction
Absorber Control
Right Front
Absorber Control
Junction
A11
Connector
A12
A36
Left Rear
Absorber Control
A24
A35
J37
Junction
J15
Connector
Junction
Connector
J27
A24
A24
A24
A24
A24
A24
A24
A12
A12
A12
A35
A35
A35
A35
A12
A36
A36
A36
A36
A11
A11
A11
A11
J9
J8
1J
11
L–Y
1J
10
L–Y
L–Y
L–Y
L
L–B
R–Y
L–W
8
IM3
R
IM3
IM3
IM3
ID1
ID1
ID1
ID1
IN1
IN1
IN1
IN1
7
EA
II
BN
IM
BO
L
L
L
L–B
L–W
L–B
L–B
L–W
L–W
R
R
R–Y
R–Y
R–W
L–R
W–B
R–W
R–W
L–R
L–R
R
R
R–Y
R–Y
R–W
R–W
L–R
L–R
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
A
2
A
1
1
1
6
5
5
A
A
A
A
W–B
C
C
C
4
4
4
2
2
10
6
3
8
7
5
1
4
4
3
5
2
1
3
2
2
5
3
5
7
6
8
D
D
E
F
B
E
F
B
B
F
E
D
Junction
Connector
J27
2
3
C
F
F
F
E
C
E
E
C
FA+
FB–
FB+
FA–
RA+
RB–
RB+
RA–
DI–204
–
DIAGNOSTICS
ELECTRIC MODULATED SUSPENSION
356
1997 LEXUS ES300 (RM511U)
CIRCUIT INSPECTION
DTC
21, 23
Absorber Control Actuator Circuit
CIRCUIT DESCRIPTION
DTC No.*
DTC Detecting Condition
Trouble Area
21
23
When the absorber control actuator is activated, over current
flows through the front or rear driving circuit.
Left front, right front, left rear and right rear absorber control
actuator
Short circuit in between absorber control actuator and ab-
sorber control ECU
Absorber control ECU
*: Code 21 corresponds to the left front and right front absorber control actuator circuit.
Code 23 corresponds to the left rear and right rear absorber control actuator circuit.
WIRING DIAGRAM
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