ABS LEXUS LS430 2003 Factory Owner's Manual

Fig. 31: Connecting Hand-Held Tester To DLC3
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a. Checking DTCs.
1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch to the ON position.
3. Read the DTCs following the prompts on the tester screen.
HINT:
Refer to the hand-held tester operator's manual for further details.
2.DTC CHECK (USING SST CHECK WIRE)
a. Checking DTCs of ABS system.
1. Using SST, connect terminals TC and CG of the DLC3.
SST 09843-18040
2. Turn the ignition switch to the ON position.
3. Read the DTC from the ABS warnin
g light on the combination meter.

HINT:
If no code appears, inspect the diagnostic circuit or ABS warning light circuit.
Fig. 32: Identifying DLC3 Connector Terminals

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TROUBLE AREA DESCRIPTION
As an example, the blinking patterns for a normal system code and trouble codes 11
and 21 are shown on the left.
4. Codes are explained in the code table DIAGNOSTIC TROUBLE CODE CHART
.
5. After completing the check, disconnect terminals TC and CG of the DLC3, and turn off the
display.
If 2 or more DTCs are detected at the same time, the DTCs will be displayed in assenting order.
Trouble AreaSee Procedure
TC and CG terminal circuitTC AND CG TERMINAL CIRCUIT
ABS warning light circuitABS WARNING LIGHT CIRCUIT (REMAINS ON)

SST 09843-18040
Fig. 36: Identifying DLC3 Connector Terminals

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3. Clear the DTCs stored in the ECU by depressing the brake pedal 8 times or more within 5 seconds.
4. Check that the ABS warning light indicates a normal system code.
5. Remove the SST.
HINT:
Clearin
g the DTCs cannot be performed by removing the battery cable or the ECU-IG fuse

Fig. 37: Identifying Brake Pedal Position
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5.END OF CHECK/CLEAR
a. Turn the ignition switch to the ON position
b. Check that the ABS warning lamp go off within approximately 3 seconds.
c. Check that "VSC" does not appear on the multi information display.
1.FREEZE FRAME DATA
HINT:

Whenever a DTC is detected or the ABS operates, the skid control ECU stores the current vehicle
(sensor) state as freeze frame data.
The skid control ECU stores the number of times (maximum: 31) the ignition switch has been turned
from off to the ON position since the last time ABS was activated. However, if the vehicle was stopped or
at low speed (4.3 mph (7 km/h) or less), or if a DTC is detected, the skid control ECU will not count the
number after that.
Freeze frame data at the time the ABS operates:
The skid control ECU stores and updates data whenever the ABS system operates.
When the ECU stores data at the time a DTC is detected, the data stored when the ABS operated is
erased.
Freeze frame data at the time a DTC is detected:
When the skid control ECU stores data at the time a DTC is detected, no updates will be performed until
the data is cleared.
a. Connect the hand-held tester to the DLC3.
b. Turn the ignition switch to the ON position.
c. From the display on the tester, select the "FREEZE FRAME DATA".

Fig. 38: Freeze Frame Data
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1.FAIL SAFE OPERATION
FAIL-SAFE CHART
HINT:
A malfunction in either the ABS or BA system will result in identical operation, with ABS, BA, EBD,
TRAC, and VSC system control prohibited.
If control is prohibited due to a malfunction during operation, control will be disabled gradually. This is
to avoid sudden vehicle instability.
HINT:
With the hand-held tester connected to the DLC3 and the ignition switch in the ON position, the ABS, TRAC
and VSC data list can be displa
yed. Follow the prompts on the tester screen to access the DATA LIST.
MalfunctionSymptom
ABS systemProhibit the ABS, BA, TRAC, and VSC control
BA systemProhibit the ABS, BA, TRAC, and VSC control
EBD systemProhibit the EBD, ABS, BA, TRAC and VSC control
TRAC systemProhibit the TRAC and VSC control
VSC systemProhibit the TRAC and VSC control

HINT:
Performing the ACTIVE TEST using the hand-held tester allows the relay and actuator, etc. to operate without
removing any parts. Performing the ACTIVE TEST as the first step of troubleshooting is one of the methods to
shorten labor time.
It is possible to display the DATA LIST during the ACTIVE TEST.
a. Connect the hand-held tester to the DLC3.
b. Turn the ignition switch to the ON position.
c. According to the display on the tester, perform the "ACTIVE TEST
".
HINT:
Ignition switch must be turned to the ON position to proceed to the Active Test using the hand-held tester.
VEHICLE CONDITION / TEST DETAILS
ItemVehicle Condition / Test DetailsDiagnostic Note
SFRRTurns ABS solenoid (SFRR) ON / OFFOperation of solenoid (clicking sound)
can be heard
SFRHTurns ABS solenoid (SFRH) ON / OFFOperation of solenoid (clicking sound)
can be heard
SFLRTurns ABS solenoid (SFLR) ON / OFFOperation of solenoid (clicking sound)
can be heard
SFLHTurns ABS solenoid (SFLH) ON / OFFOperation of solenoid (clicking sound)
can be heard
SRRRTurns ABS solenoid (SRRR) ON / OFFOperation of solenoid (clicking sound)
can be heard
ItemVehicle Condition / Test DetailsDiagnostic Note
SRRHTurns ABS solenoid (SRRH) ON / OFFOperation of solenoid (clicking sound)
can be heard
SRLRTurns ABS solenoid (SRLR) ON / OFFOperation of solenoid (clicking sound)
can be heard
SRLHTurns ABS solenoid (SRLH) ON / OFFOperation of solenoid (clicking sound)
can be heard
SFRR & SFRHTurns ABS solenoid SFRR & SFRH
ON / OFFOperation of solenoid (clicking sound)
can be heard
SFLR & SFLHTurns ABS solenoid SFLR & SFLH
ON / OFFOperation of solenoid (clicking sound)
can be heard
SRH & SRRTurns ABS solenoid SRH & SRR ON /
OFFOperation of solenoid (clicking sound)
can be heard
SRLR & SRLHTurns ABS solenoid SRLR & SRLH
ON / OFFOperation of solenoid (clicking sound)
can be heard
SFRH & SFLHTurns ABS solenoid SFRH & SFLH
ON / OFFOperation of solenoid (clicking sound)
can be heard

HINT:
If a malfunction code is displayed during the DTC check, check the circuit indicated by the table below.
DIAGNOSTIC TROUBLE CODE CHART
SMF (BA-SOL)Turns TRAC solenoid SMF (BA-SOL)
ON / OFFOperation of solenoid (clicking sound)
can be heard
SMRTurns TRAC solenoid SMR ON / OFFOperation of solenoid (clicking sound)
can be heard
SOL RELAYTurns ABS solenoid relay ON / OFFOperation of solenoid (clicking sound)
can be heard
ABS MOT RELAYTurns ABS motor relay ON / OFFOperation of solenoid (clicking sound)
can be heard
ABS WARN LIGHTTurns ABS warning light ON / OFFObserve combination meter
VSC WARN LIGHTTurns VSC warning light ON / OFFObserve combination meter
VSC / TRC OFF INDTurns VSC / TRC OFF indicator ON /
OFFObserve combination meter
SLIP INDI LIGHTTurns SLIP indicator light ON / OFFObserve combination meter
BRAKE WRN LIGHTTurns BRAKE warning light ON / OFFObserve combination meter
VSC / BR WARN
BUZTurns VSC / BRAKE warning buzzer
ON / OFFBuzzer can be heard
STP LIGHT RELAYTurns stop light ON / OFFStop light come on
DTCDescription
DTC C0200/31, C0205/32RIGHT/LEFT FRONT SPEED SENSOR
DTC C0210/33, C0215/34RIGHT/LEFT REAR SPEED SENSOR
DTC C0226/21, C0236/22, C0246/23,
C0256/24, C1225/25
SFR/SFL/SRR/SRL/SM SOLENOID CIRCUIT
DTC C0273/13, C0274/14, C1361/91OPEN CIRCUIT IN ABS MOTOR RELAY CIRCUIT,
B+ SHORT CIRCUIT IN ABS MOTOR RELAY
CIRCUIT, SHORT CIRCUIT IN ABS MOTOR FAIL
SAFE RELAY CIRCUIT
DTC C0278/11, C0279/12OPEN/SHORT CIRCUIT IN ABS SOLENOID
RELAY CIRCUIT
DTC C1201/51ENGINE CONTROL SYSTEM MALFUNCTION
DTC C1203/53ECM COMMUNICATION CIRCUIT
MALFUNCTION
DTC C1210/36, C1336/39ZERO POINT CALIBRATION OF YAW
RATE/DECELERATION SENSOR UNDONE
DTC C1223/43ABS CONTROL SYSTEM MALFUNCTION
DTC C1231/31MALFUNCTION IN STEERING ANGLE SENSOR
CIRCUIT

DTC chart of ABS:
DTC C1232/32, C1234/34, C1243/43,
C1244/44, C1245/45, C1381/97
MALFUNCTION IN DECELERATION/YAW RATE
SENSOR, OPEN OR SHORT IN DECELERATION
SENSOR CIRCUIT, MALFUNCTION IN POWER
SUPPLY VOLTAGE YAW/DECELERATION
SENSOR
DTC C1235/35, C1236/36, C1238/38,
C1239/39
FOREIGN MATTER IS ATTACHED ON TIP OF
RIGHT/LEFT FRONT/REAR SENSOR
DTC C1241/41LOW BATTERY POSITIVE VOLTAGE
DTC C1246/46MALFUNCTION IN MASTER CYLINDER
PRESSURE SENSOR
DTC C1249/49OPEN CIRCUIT IN STOP LIGHT SWITCH CIRCUIT
DTC C1251/51PUMP MOTOR IS LOCKED/OPEN CIRCUIT IN
PUMP MOTOR GROUND
DTC C1267/67Brake Pedal Load Sensing Switch

Fig. 42: Diagnostic Trouble Code Information Chart (2 Of 2)
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*1, *2:
Even after the troubled areas are repaired, ABS warning light w<004c004f004f00030051005200570003004a00520003005200490049000300580051004f00480056005600030057004b0048000300490052004f004f0052005a004c0051004a0003005200530048005500440057004c005200510056000300440055004800
03[
performed.
*1:
1. Drive the vehicle at 12 mph (20 km/h) for 30 seconds or more and check that the ABS warning
light goes off.
2. Clear the DTC (see DTC CHECK/CLEAR
).