Lexus ES300 (2002 year). Manual — part 351
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DIAGNOSTICS
ELECTRONIC MODULATED SUSPENSION SYSTEM
05-203
356
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
SGR (A22 - 17) - GND (A22 -
14)
GR-B
↔
W-B
Always
Continuity (
Ω
)
SBR (A22 - 18) - GND (A22 -
14)
LG-R
↔
W-B
IG switch ON
4.5 - 5.5
Ts (A22 - 19) - GND (A22 -
LG B
W B
IG switch ON and terminals Ts - CG connected
Below 1.0
Ts (A22 19) GND (A22
14)
LG-B
↔
W-B
IG switch ON and terminals Ts - CG not connected
10 - 14
SW2 (A22 - 20) - GND (A22 -
14)
V
↔
W-B
IG switch ON and absorber control switch ”SEMI-COMFORT”
or ”SEMI-SPORT”
0
SW1 (A22 - 21) - GND (A22 -
14)
Y
↔
W-B
IG switch ON and absorber control switch ”SEMI-COMFORT”
or ”SEMI-SPORT”
0
MOD2 (A22 - 23) - GND (A22
- 14)
W-B
↔
W-B
IG switch ON
Continuity (
Ω
)
FRO (A22 - 25) - GND (A22 -
14)
GR-R
↔
W-B
Vehicle speed 20 km/h (12 mph) or higher
Pulse generation
RAR+ (A22 - 26) - RAR- (A22
- 12)
L-R
↔
R-W
IG switch ON
Continuity (
Ω
)
056AA-01
05-204
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DIAGNOSTICS
ELECTRONIC MODULATED SUSPENSION SYSTEM
357
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
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 does not operate at all
1. Absorber control actuator circuit
2. Ts terminal circuit
3. Shock absorber
4. Absorber control ECU
Only anti-roll control does not operate
1. Steering angle sensor circuit
2. Right front speed sensor circuit
3. Absorber control ECU
Only anti-squat control does not operate
1. Crankshaft position sensor circuit
2. Right front speed sensor circuit
3. Absorber control ECU
Only anti-dive control does not operate
1. Stop light switch circuit
2. Right front speed sensor circuit
3. Absorber control ECU
Only semi-active control does not operate
1. Right front speed sensor circuit
2. Absorber control ECU
Only speed sensing control does not operate
1. Right front speed sensor circuit
2. Absorber control ECU
Only unsprung damping control does not operate
1. Right front speed sensor circuit
2. Absorber control ECU
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DIAGNOSTICS
ELECTRONIC MODULATED SUSPENSION SYSTEM
05-205
358
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
DTC
C1715/15 RIGHT FRONT ACCELERATION SENSOR
CIRCUIT
DTC
C1716/16 LEFT FRONT ACCELERATION SENSOR
CIRCUIT
DTC
C1717/17 REAR ACCELERATION SENSOR CIRCUIT
DTC
C1791/91 RIGHT FRONT ACCELERATION SENSOR
CIRCUIT
DTC
C1792/92 LEFT FRONT ACCELERATION SENSOR
CIRCUIT
DTC
C1793/93 REAR ACCELERATION SENSOR CIRCUIT
CIRCUIT DESCRIPTION
The acceleration sensor (assy) detect the up-and-down acceleration of the vehicle. The acceleration sen-
sor (assy) 3 in total are mounted in the absorber control ECU, at the forward of the glove compartment door
at the instrument panel safety pad position and in the rear luggage, and detect the up-and down acceleration
of the vehicle, respectively. The acceleration sensor (assy) convert the resistance into electrical signal and
output to the absorber control ECU.
DTC No.
DTC Detecting Condition
Trouble Area
C1715/15
C1791/91
Right front acceleration sensor assy
Right front acceleration sensor circuit
Absorber control ECU
C1716/16
C1792/92
Acceleration sensor signal is fixed to 0 V or 5 V
Absorber control ECU
(Left front acceleration sensor is a built-in equipment)
C1717/17
C1793/93
Rear acceleration sensor
Rear acceleration sensor circuit
Absorber control ECU
HINT:
DTC No. C1715/15 and C1791/91 is the right front acceleration sensor assy.
DTC No. C1716/16 and C1792/92 is the left front acceleration sensor (left front acceleration sensor
is a built-in equipment).
DTC No. C1717/17 and C1793/93 is the rear acceleration sensor.
056AB-01
F41647
SGFL
SBL
SGL
A22
4
5
3
O
V-Y
B-R
IF4
2
1
GL1
VGS
GGND
Absorber Control ECU
A24
Right Front
Acceleration Sensor
A22
A22
O
V-Y
B-R
IF4
IF4
5
3
3
2
A40
Rear Acceleration
Sensor
GL1
VGS
GGND
1
3
2
P-L
LG-R
GR-B
IO5
IF2
16
14
15
IO5
IO5
3
1
2
P-L
LG-R
GR-B
IF2
IF2
P-L
LG-R
GR-B
A22
A22
A22
16
18
17
SGRR
SBR
SGR
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DIAGNOSTICS
ELECTRONIC MODULATED SUSPENSION SYSTEM
359
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
WIRING DIAGRAM
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