Lexus ES300 (2002 year). Service manual — part 294
0529F-03
F41247
Combination Meter
ABS Warning Light
VSC Warning Light
Brake Warning Light
TRAC OFF Indicator Light
SLIP Indicator Light
Skid Control ECU
Steering Sensor
Stop Lamp Switch
Front Speed Sensor
ABS R/B
Rear Speed Sensor
ABS & Traction Actuator
Skid Control Buzzer
Yaw Rate Sensor
(Include Deceleration Sensor)
TRAC OFF Switch
05-304
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DIAGNOSTICS
ABS WITH EBD & BA & TRAC & VSC SYSTEM
457
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
LOCATION
0529G-03
F40901
S8
S7
S6
S5
-
DIAGNOSTICS
ABS WITH EBD & BA & TRAC & VSC SYSTEM
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2002 LEXUS ES300 REPAIR MANUAL (RM911U)
TERMINALS OF ECU
Symbols (Terminals No.)
Wiring Color
Condition
STD Voltage (V)
SRLR (S5 - 1) - GND (S5 - 15,
22, S8 - 2, 3)
LG-B
↔
W-B
IG switch ON, ABS warning light OFF
10 - 14
SM1- (S5 - 2) - GND (S5 - 15,
22, S8 - 2, 3)
Y-G
↔
W-B
IG switch OFF
Below 1.0
SM1+ (S5 - 3) - GND (S5 - 15,
22, S8 - 2, 3)
L-R
↔
W-B
IG switch ON, ABS warning light OFF
Below 1.0
SM2- (S5 - 4) - GND (S5 - 15,
22, S8 - 2, 3)
B-L
↔
W-B
IG switch OFF
Below 1.0
SM2+ (S5 - 5) - GND (S5 - 15,
22, S8 - 2, 3)
B-W
↔
W-B
IG switch ON, ABS warning light OFF
Below 1.0
AST (S5 - 6) - GND (S5 - 15,
22, S8 - 2, 3)
R
↔
W-B
IG switch ON, ABS warning light OFF
10 - 14
SRLH (S5 - 7) - GND (S5 - 15,
22, S8 - 2, 3)
G-Y
↔
W-B
IG switch ON, ABS warning light OFF
10 - 14
SFRR (S5 - 8) - GND (S5 -
15, 22, S8 - 2, 3)
W-R
↔
W-B
IG switch ON, ABS warning light OFF
10 - 14
PMC (S5 - 10) - E2 (S5 - 19)
B
↔
W
IG switch ON, stop light switch OFF
0.3 - 0.9
E3 (S5 - 12) - GND (S5 - 15,
22, S8 - 2, 3)
R
↔
W-B
IG switch OFF
Continuity
FSS (S5 - 13) - GND (S5 - 15,
22, S8 - 2, 3)
Shielded
↔
W-B
IG switch OFF
Continuity
MT (S5 - 14) - GND (S5 - 15,
22, S8 - 2, 3)
R-W
↔
W-B
IG switch ON (Motor relay is OFF)
Below 1.5
SFRH (S5 - 16) - GND (S5 -
15, 22, S8 - 2, 3)
R-B
↔
W-B
IG switch ON, ABS warning light OFF
10 - 14
PMC2 (S5 - 18) - E3 (S5 - 12)
W
↔
R
IG switch ON, stop light switch OFF
0.3 - 0.9
E2 (S5 - 19) - GND (S5 - 15,
22, S8 - 2, 3)
W
↔
W-B
IG switch OFF
Continuity
VCM (S5 - 20) - GND (S5 -
15, 22, S8 - 2, 3)
R
↔
W-B
IG switch ON
4.5 - 5.5
VCM2 (S5 - 21) - GND (S5 -
15, 22, S8 - 2, 3)
B
↔
W-B
IG switch ON
4.5 - 5.5
VYS (S6 - 1) - GND (S5 - 15,
22, S8 - 2, 3)
R
↔
W-B
IG switch ON
4.5 - 5.5
YSS (S6 - 3) - GND (S5 - 15,
22, S8 - 2, 3)
Shielded
↔
W-B
IG switch OFF
Continuity
TRIG (S6 - 6) - GND (S5 - 15,
22, S8 - 2, 3)
Y-R
↔
W-B
IG switch ON
Above 3.5
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DIAGNOSTICS
ABS WITH EBD & BA & TRAC & VSC SYSTEM
459
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
CSW (S6 - 7) - GND (S5 - 15,
22, S8 - 2, 3)
LG
↔
W-B
IG switch ON, TRC OFF switch OFF
10 - 14
P (S6 - 9) - GND (S5 - 15, 22,
G W
W B
IG switch ON, shift lever is in P range
8 - 14
P (S6 9) GND (S5 15, 22,
S8 - 2, 3)
G-W
↔
W-B
IG switch ON, shift lever is in other than P range
Below 1.5
YAW2 (S6 - 10) - GND (S5 -
15, 22, S8 - 2, 3)
W
↔
W-B
IG switch ON, yawrate sensor is stationary
2 - 3
GSS (S6 - 11) - GND (S5 - 15,
22, S8 - 2, 3)
Shielded
↔
W-B
IG switch OFF
Continuity
YD (S6 - 16) - GND (S5 - 15,
22, S8 - 2, 3)
G
↔
W-B
IG switch ON, VSC warning light OFF
Above 4.5
SS1+ (S6 - 18) - SS1- (S6 -
27)
P
↔
V
Engine idling, slowly tun steering wheel
Pulse generation
GYAW (S6 - 20) - GND (S5 -
15, 22, S8 - 2, 3)
B
↔
W-B
IG switch OFF
Continuity
GL1 (S6 - 21) - GND (S5 - 15,
22, S8 - 2, 3)
Y
↔
W-B
IG switch ON, vehicle is stopped
0.5 - 4.5
GL2 (S6 - 22) - GND (S5 - 15,
22, S8 - 2, 3)
L
↔
W-B
IG switch ON, vehicle is stopped
0.5 - 4.5
NEO (S6 - 26) - GND (S5 -
15, 22, S8 - 2, 3)
BR-W
↔
W-B
Engine idling
Pulse generation
D/G (S6 - 28) - GND (S5 - 15,
22, S8 - 2, 3)
W
↔
W-B
IG switch ON
10 - 14
WA (S7 - 1) - GND (S5 - 15,
R B
W B
IG switch ON, ABS warning light ON
4 - 8
WA (S7 1) GND (S5 15,
22, S8 - 2, 3)
R-B
↔
W-B
IG switch ON, ABS warning light OFF
Below 2.0
SP1 (S7 - 2) - GND (S5 - 15,
22, S8 - 2, 3)
L-O
↔
W-B
Vehicle drives at about 20 km/h (12 mph)
Pulse generation
STP (S7 - 3) - GND (S5 - 15,
G W
W B
Stop light switch OFF
Below 1.5
STP (S7 3) GND (S5 15,
22, S8 - 2, 3)
G-W
↔
W-B
Stop light switch ON
8 - 14
WT (S7 - 4) - GND (S5 - 15,
L
W B
IG switch ON, TRAC OFF indicator light ON
Below 2.0
WT (S7 4) GND (S5 15,
22, S8 - 2, 3)
L
↔
W-B
IG switch ON, TRAC OFF indicator light OFF
10 - 14
BZ (S7 - 5) - GND (S5 - 15,
P B
W B
IG switch ON, skid control buzzer is sounded
Below 1.0
↔
10 - 14
BZ (S7 5) GND (S5 15,
22, S8 - 2, 3)
P-B
↔
W-B
IG switch ON, skid control buzzer is not sounded
10 - 14
IND (S7 - 6) - GND (S5 - 15,
LG
W B
IG switch ON, SLIP indicator light ON
Below 2.0
IND (S7 6) GND (S5 15,
22, S8 - 2, 3)
LG
↔
W-B
IG switch ON, SLIP indicator light OFF
10 - 14
IG1 (S7 - 7) - GND (S5 - 15,
22, S8 - 2, 3)
B-R
↔
W-B
IG switch ON
10 - 14
LBLO (S7 - 8) - GND (S5 - 15,
R W
W B
IG switch ON, fluid in master cylinder reservoir above MIN level
and parking brake switch is OFF (Brake warning light is OFF)
Below 2.0
LBLO (S7 8) GND (S5 15,
22, S8 - 2, 3)
R-W
↔
W-B
IG switch ON, fluid in master cylinder reservoir below MIN level
or parking brake switch is ON (Brake warning light ON)
10 - 14
ENG+ (S7 - 9) - ENG- (S7 -
18)
W
↔
B
IG switch ON
Pulse generation
Ts (S7 - 10) - GND (S5 - 15,
22, S8 - 2, 3)
LG-B
↔
W-B
IG switch ON
10 - 14
TRC+ (S7 - 11) - TRC- (S7 -
20)
G
↔
L
IG switch ON
Pulse generation
FRO (S7 - 13) - GND (S5 - 15,
22, S8 - 2, 3)
GR-R
↔
W-B
Vehicle drives at about 20 km/h (12 mph)
Pulse generation
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DIAGNOSTICS
ABS WITH EBD & BA & TRAC & VSC SYSTEM
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2002 LEXUS ES300 REPAIR MANUAL (RM911U)
VSCW (S7 - 14) - GND (S5 -
R L
W B
IG switch ON, VSC warning light ON
Below 2.0
VSCW (S7 14) GND (S5
15, 22, S8 - 2, 3)
R-L
↔
W-B
IG switch ON, VSC warning light OFF
10 - 14
RR+ (S7 - 16) - RR- (S7 - 15)
P
↔
L
IG switch ON, slowly turn right rear wheel
Pulse generation
Tc (S7 - 19) - GND (S5 - 15,
22, S8 - 2, 3)
P-B
↔
W-B
IG switch ON
10 - 14
PKB (S7 - 21) - GND (S5 - 15,
P
L
IG switch ON, parking brake switch ON
Below 1.5
PKB (S7 21) GND (S5 15,
22, S8 - 2, 3)
P
↔
L
IG switch ON, parking brake switch OFF
10 - 14
RL+ (S7 - 22) - RL- (S7 - 23)
R
↔
G
IG switch ON, slowly turn left rear wheel
Pulse generation
+BO (S7 - 24) - GND (S5 - 15,
22, S8 - 2, 3)
P
↔
W-B
Always
10 - 14
R+ (S8 - 1) - GND (S5 - 15,
22, S8 - 2, 3)
GR-R
↔
W-B
IG switch ON
10 - 14
SRM1 (S8 - 4) - GND (S5 -
15, 22, S8 - 2, 3)
Y-R
↔
W-B
IG switch ON, ABS warning light OFF
10 - 14
SRC2 (S8 - 5) - GND (S5 - 15,
22, S8 - 2, 3)
B-Y
↔
W-B
IG switch ON, ABS warning light OFF
10 - 14
SFLH (S8 - 6) - GND (S5 - 15,
22, S8 - 2, 3)
L-B
↔
W-B
IG switch ON, ABS warning light OFF
10 - 14
SFLR (S8 - 7) - GND (S5 - 15,
22, S8 - 2, 3)
W-L
↔
W-B
IG switch ON, ABS warning light OFF
10 - 14
SRRH (S8 - 8) - GND (S5 -
15, 22, S8 - 2, 3)
W-R
↔
W-B
IG switch ON, ABS warning light OFF
10 - 14
SRRR (S8 - 9) - GND (S5 -
15, 22, S8 - 2, 3)
R-G
↔
W-B
IG switch ON, ABS warning light OFF
10 -14
SR (S8 - 10) - R+ (S10 - 1)
GR
↔
L-B
IG switch ON, ABS warning light OFF
Below 1.0
FR+ (S8 - 13) - FR- (S8 - 12)
W
↔
B
IG switch ON, slowly turn right front wheel
Pulse generation
SRM2 (S8 - 21) - GND (S5 -
15, 22, S8 - 2, 3)
Y-B
↔
W-B
IG switch ON, ABS warning light OFF
10 - 14
+BI (S8 - 22) - GND (S5 - 15,
22, S8 - 2, 3)
W-R
↔
W-B
IG switch ON, ABS warning light OFF
10 - 14
MR (S8 - 23) - GND (S5 - 15,
22, S8 - 2, 3)
W-B
↔
W-B
IG switch ON, ABS motor stops
10 - 14
MRF (S8 - 24) - GND (S5 -
15, 22, S8 - 2, 3)
GR-L
↔
W-B
IG switch ON
Below 1.0
LBL- (S8 - 25) - GND (S5 -
15, 22, S8 - 2, 3)
R-W
↔
W-B
IG switch ON, fluid in master cylinder reservoir above MIN level
4 - 8
FL+ (S8 - 28) - FL- (S8 - 27)
BR
↔
Y
IG switch ON, slowly turn left front wheel
Pulse generation
SRC1 (S8 - 31) - GND (S5 -
15, 22, S8 - 2, 3)
B-R
↔
W-B
IG switch ON, ABS warning light OFF
10 - 14
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