Lexus RX300 (MCU15). Service manual — part 245
F02098
GL2
GL1
VGS
GGND
Front
Rearward
(+)
(+)
(–)
(–)
Forward
DI–212
–
DIAGNOSTICS
ABS & BA & TRC & VSC SYSTEM
LEXUS RX300 (RM785E)
5.
DECELERATION SENSOR CHECK
(a)
Connect 3 dry batteries of 1.5 V in series.
(b)
Connect VGS terminal to the batteries’ positive (+) termi-
nal, and GGND terminal to the batteries’ negative (–) ter-
minal, apply about 4.5 V between VGS – GGND termi-
nals.
NOTICE:
S
When inspecting deceleration sensor, remove it with
the bracket together. Do not remove the sensor from
the bracket. When replacing deceleration sensor, re-
place the sensor with it assembled to the bracket as-
sembly.
S
Do not apply voltage of 6 V or more to terminals VGS
and GGND.
(c)
Check the output voltage of GL1 and GL2 terminals.
Symbols
Condition
Standard Value
GL1
Horizontal
About 2.3 V
GL1
Lean forward
0.4 V – about 2.3 V
GL1
Lean rearward
About 2.3 V – 4.1 V
GL2
Horizontal
About 2.3 V
GL2
Lean forward
About 2.3 V – 4.1 v
GL2
Lean rearward
0.4 V – about 2.3 V
HINT:
S
If the sensor is tilted too much it may show the wrong val-
ue.
S
If dropped, the sensor should be replaced with a new one.
S
The sensor removed from the vehicle should not be
placed upside down.
DI0WA–10
–
DIAGNOSTICS
ABS & BA & TRC & VSC SYSTEM
DI–213
LEXUS RX300 (RM785E)
DIAGNOSTIC TROUBLE CODE CHART
NOTICE:
Before replacing or removing the part, turn the ignition switch OFF.
HINT:
S
Using SST 09843–18040, connect the terminals Tc and CG of DLC3.
S
If any abnormality is not found when inspecting parts, inspect the ECU.
S
If a malfunction code is displayed during the DTC check, check the circuit listed for that code. For de-
tails of each code, turn to the page referred to under the ”See page” for respective ”DTC No.” in the
DTC chart.
DTC chart of ABS:
DTC No.
(See Page)
Detection Item
Trouble Area
C0200 / 31*
1
(DI–222)
Right front wheel speed sensor signal malfunction
C0205 / 32*
1
(DI–222)
Left front wheel speed sensor signal malfunction
S Right front, left front, right rear and left rear speed sensor
E
h
d
i
it
C0210 / 33*
1
(DI–222)
Right rear wheel speed sensor signal malfunction
S Each speed sensor circuit
S Sensor rotor
C0215 / 34*
1
(DI–222)
Left rear wheel speed sensor signal malfunction
C0226 / 21
(DI–229)
Open or short circuit of brake actuator solenoid circuit (SFR
circuit)
S Brake actuator
S SFRR or SFRH circuit
C0236 / 22
(DI–229)
Open or short circuit of brake actuator solenoid circuit (SFL
circuit)
S Brake actuator
S SFLR or SFLH circuit
C0246 / 23
(DI–229)
Open or short circuit of brake actuator solenoid circuit (SRR
circuit)
S Brake actuator
S SRRR or SRRH circuit
C0256 / 24
(DI–229)
Open or short circuit of brake actuator solenoid circuit (SRL
circuit)
S Brake actuator
S SRLR or SRLH circuit
C0273 / 13*
1
(DI–233)
Open or short circuit of ABS motor relay circuit
S ABS motor relay
C0274 / 14
(DI–233)
B+ short circuit of ABS motor relay circuit
ABS motor relay
S ABS motor relay circuit
C0278 / 11
(DI–237)
Open or short circuit of ABS solenoid relay circuit
S ABS solenoid relay
C0279 / 12
(DI–237)
B+ short circuit of ABS solenoid relay circuit
ABS solenoid relay
S ABS solenoid relay circuit
C1225 / 25
(DI–229)
Open or short circuit of brake actuator solenoid circuit (SMC1
or SMC2 circuit)
S Brake actuator
S SMC1 or SMC2 circuit
C1226 / 26
(DI–229)
Open or short circuit of brake actuator solenoid circuit (SMV1
or SMV2 circuit)
S Brake actuator
S SMV1 or SMV2 circuit
C1227 / 27
(DI–229)
Open or short circuit of brake actuator solenoid circuit (SRC1
or SRC2 circuit)
S Brake actuator
S SRC1 or SRC2 circuit
C1235 / 35
(DI–222)
Foreign matter is attached on the tip of the right front sensor
C1236 / 36
(DI–222)
Foreign matter is attached on the tip of the left front sensor
S Right front, left front, right rear, left rear speed sensor
C1238 / 38
(DI–222)
Foreign matter is attached on the tip of the right rear sensor
Right front, left front, right rear, left rear s eed sensor
S Speed sensor rotor
C1239 / 39
(DI–222)
Foreign matter is attached on the tip of the left rear sensor
DI–214
–
DIAGNOSTICS
ABS & BA & TRC & VSC SYSTEM
LEXUS RX300 (RM785E)
C1241 / 41
(DI–263)
Low battery voltage or abnormally high battery voltage
S Battery
S Charging system
S Power source circuit
C1243 / 43*
1
(DI–267)
Malfunction in deceleration sensor (abnormal constant output)
S Deceleration sensor
S Wire harness for deceleration sensor system
C1244 / 44
(DI–269)
Open or short circuit of deceleration sensor circuit
S Deceleration sensor
S Deceleration sensor circuit
C1245 / 45*
1
(DI–267)
Malfunction in deceleration sensor
S Deceleration sensor
S Wire harness for deceleration sensor system
C1246 / 46*
2
(DI–271)
Malfunction in master cylinder pressure sensor
S Master cylinder pressure sensor
S Master cylinder pressure sensor circuit
C1249 / 49
(DI–274)
Open circuit of stop light switch circuit
Stop light switch circuit
C1251 / 51*
1
(DI–277)
Pump motor is locked
Open circuit of pump motor circuit
ABS pump motor
Always ON
(DI–281)
Malfunction in skid control ECU
S Battery
S Charging system
S Power source circuit
S Skid control ECU
S
*1: These DTC will not affect to cancel the ABS warning light by repairing the trouble area, so perform
the following operations.
(1)
Drive the vehicle at 20 km/h (12 mph) for 30 seconds or more and check that the ABS warning
light goes off.
(2)
Clear the DTC (See page DI–205).
S
*2: These DTC will not affect to cancel the ABS warning light by repairing the trouble area, so perform
the following operations.
(1)
Keep the vehicle in the stationary condition for 5 seconds or more and depress the brake pedal
lightly 2 or 3 times.
(2)
Driving the vehicle at the vehicle speed 50 km/h (31 mph) and keep depressing the brake pedal
strongly for about 3 seconds.
(3)
Repeat the above operation 3 times or more and check that the ABS warning light goes off.
(4)
Clear the DTC (See page DI–205).
HINT:
There is a case that hand–held tester cannot be used when ABS warning light is always on.
DTC chart of VSC:
DTC No.
(See page)
Detection Item
Trouble Area
C1201 / 51
(DI–242)
Engine and ECT ECU system malfunction
Engine control system
C1202 / 52
(DI–243)
Brake fluid level low
Open circuit of brake fluid level warning switch circuit
S Brake fluid level
S Brake fluid level warning switch
S Brake fluid level warning switch circuit
C1203 / 53
(DI–245)
Engine and ETC ECU communication circuit malfunction
S TRC+ or TRC– circuit
S ENG+ or ENG– circuit
S Engine and ECT ECU
C1207 / 37
(DI–247)
Malfunction in neutral start switch
S Neutral start switch
S Neutral start switch (Park/Reverse range circuit)
C1210 / 36
(DI–250)
Zero point calibration of yaw rate sensor undone
S Yaw rate sensor
S Yaw rate sensor circuit
S P range switch circuit
–
DIAGNOSTICS
ABS & BA & TRC & VSC SYSTEM
DI–215
LEXUS RX300 (RM785E)
C1223 / 43
(DI–252)
Malfunction in ABS control system
ABS control system
C1224 / 44
(DI–253)
Open or short circuit of NE signal circuit
S NEO circuit
S Engine and ECT ECU
C1231 / 31
(DI–255)
Malfunction in steering angle sensor
S Steering angle sensor
S Steering angle sensor circuit
C1232 / 32
(DI–258)
Malfunction in deceleration sensor
S Deceleration sensor
S Deceleration sensor circuit
C1233 / 33
(DI–260)
Open or short circuit of yaw rate sensor circuit
S Yaw rate sensor
C1234 / 34
(DI–260)
Malfunction in yaw rate sensor
Yaw rate sensor
S Yaw rate sensor circuit
C1335 / 35
(DI–279)
Malfunction in steering angle sensor communication circuit
Steering angle sensor circuit
Always ON
(DI–284)
Malfunction in skid control ECU
Open circuit of VSC warning indicator circuit
S Power source circuit
S Charging system
S VSC warning indicator circuit
S Skid control ECU
HINT:
There is a case that hand–held tester cannot be used when VSC warning indicator is always on.
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