Wiring diagram LEXUS LS430 2003 Factory User Guide

Fig. 79: DTC C1232/32 And DTC C1381/97 Detecting Condition And Trouble Area
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WIRING DIAGRAM

Fig. 80: Deceleration Sensor Wiring Diagram
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INSPECTION PROCEDURE
HINT:

Fig. 87: Identifying Speed Sensor Rotor Location
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CIRCUIT DESCRIPTION
Fig. 88: DTC C1241/41 Detecting Condition And Trouble Area

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WIRING DIAGRAM

Fig. 89: Low Battery Wiring Diagram
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INSPECTION PROCEDURE
1.INSPECT FUSE (ABS-IG FUSE)
a. Remove the ABS-IG Fuse from the driver side J/B.
b. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION SPECIFIED CONDITION
Tester ConnectionSpecified Condition
ABS-IG fuseBelow 1 ohms (Continuity)

Fig. 95: Identifying Skid Control ECU Connector Terminals
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CIRCUIT DESCRIPTION
Recognition of brake operation by sending stop lamp signal to skid control ECU.
Fig. 96: DTC C1249/49 Detecting Condition And Trouble Area

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WIRING DIAGRAM

Fig. 97: Stop Light Switch Wiring Diagram
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INSPECTION PROCEDURE
1.CHECK STOP LAMP SWITCH OPERATION
a. Check that the stop light comes on when the brake pedal is depressed and turns off when the brake
pedal is released.
OK:

OK: Go to next step
9.RECONFIRM DTC
a. Clear the DTC (see DTC CHECK/CLEAR
).
b. Turn the ignition switch to the ON position.
c. Check that the same DTC is recorded (see DTC CHECK/CLEAR
).
OK:
The same DTC is recorded.
NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE
OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE REPLACEMENT
)
CIRCUIT DESCRIPTION
ABS pump motor is located inside the brake actuator. The motor is used for BA, TRAC and VSC operation.
Fig. 104: DTC C1251/51 Detection Condition And Trouble Area Description Chart

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WIRING DIAGRAM

Fig. 105: Pump Motor Wiring Diagram
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INSPECTION PROCEDURE
1.PERFORM ACTIVE TEST BY HAND-HELD TESTER (ABS MOTOR RELAY OPERATION)
a. Connect the hand-held tester to the DLC3.
b. Start the engine.
c. Select the ACTIVE TEST mode on the hand-held tester.
d. Check the operation sound of the ABS motor individually when operating it with the hand-held
tester.

Fig. 107: DTC C1267/67 Detection Condition And Trouble Area Description Chart
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WIRING DIAGRAM
Fig. 108: Brake Pedal Load Sensing Switch Wiring Diagram

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INSPECTION PROCEDURE
1.READ VALUE OF HAND-HELD TESTER
a. Connect the hand-held tester to the DLC3.
b. Start the engine.
c. Select the DATA LIST mode on the hand-held tester.
Fig. 109: DATA LIST Mode Description

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During DTC read by SST (Check Wire), if the ABS warning light remains on, trouble shoot by following this
inspection flow.
WIRING DIAGRAM
Fig. 112: ABS Warning Light Wiring Diagram

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