2003 LEXUS LS430 Identifying condition

TESTER CONNECTION SPECIFIED CONDITION
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
Fig. 82: Identifying Yaw Rate And Deceleration Sensor Connector Terminals (2 Of 2)

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OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE REPLACEMENT
)
Tester ConnectionSpecified Condition
Y1-1 (GND) - Body groundBelow 1 ohms

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

TESTER CONNECTION SPECIFIED CONDITION
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GND TERMINAL - BODY
GROUND)
Fig. 92: Identifying Skid Control ECU Connector Terminals

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OK: CHECK AND REPAIR HARNESS AND CONNECTOR (IG1 TERMINAL - BATTERY)
CIRCUIT DESCRIPTION
Master c
ylinder pressure sensor is connected to the skid control ECU in the actuator.
Tester ConnectionSpecified Condition
S42-32 (GND) - Body groundBelow 1ohms

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. 101: Identifying Stop Lamp Switch Assy Connector Terminals
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NG: REPLACE STOP LAMP SWITCH ASSY
OK: Go to next step
7.CHECK HARNESS AND CONNECTOR (STOP LAMP SWITCH - DRIVER SIDE J/B ECU)
a. Disconnect the stop lamp switch connector and driver side J/B connector.
b. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION SPECIFIED CONDITION
c. Measure the resistance according to the value (s) in the table below.
Standard:
Tester ConnectionSpecified Condition
(S19-1) - D3-13 (STP-1)Below 1 ohms

Fig. 102: Identifying Stop Lamp Switch Connector And Driver Side J/B Connector Terminals
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NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
8.CHECK HARNESS AND CONNECTOR (STPA OF DRIVER SIDE J/B ECU - STP OF SKID
CONTROL ECU)
a. Disconnect the driver side J/B connector and skid control ECU connector.
b. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION SPECIFIED CONDITION
Standard:
TESTER CONNECTION SPECIFIED CONDITION
Tester ConnectionSpecified Condition
D5-3 (STPA) - S42-27 (STP)Below 1 ohms
Tester ConnectionSpecified Condition
S42-27 (STP) - Body ground1 Mohms or higher

b. Disconnect the brake fluid level warning switch connector.
c. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION SPECIFIED CONDITION
NG: REPLACE BRAKE FLUID LEVEL WARNING SWITCH
Fig. 124: Identifying Brake Fluid Level Warning Switch Terminals

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OK: Go to next step
7.CHECK HARNESS OR CONNECTOR (BRAKE FLUID LEVEL WARNING SWITCH SKID
CONTROL ECU)
Tester ConnectionSwitch ConditionSpecified Condition
(B1-1) - (B1-2)Float UP1M ohms or higher
(B1-1) - (B1-2)Float DOWNBelow 1 ohms

Fig. 128: Identifying TRAC Control Switch Terminals
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OK: Go to next step
5.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - TRAC OFF SWITCH)
a. Disconnect the skid control ECU connector and the TRAC control switch connector.
b. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION SPECIFIED CONDITION
Tester ConnectionSpecified Condition