check engine LEXUS LS430 2003 Factory Service Manual

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3600580045[-Assy With Nut
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
30.CONNECT BATTERY NEGATIVE TERMINAL
31.ADJUST SHIFT LEVER POSITION (SEE ADJUSTMENT
)
32.INSPECT SHIFT LEVER POSITION (SEE ADJUSTMENT

33.INSPECT PARK/NEUTRAL POSITION SWITCH ASSY (SEE ADJUSTMENT
)
34.INSTALL PROPELLER W/CENTER BEARING SHAFT ASSY (SEE OVERHAUL
)
35.INSTALL EXHAUST PIPE ASSY (SEE REPLACEMENT
)
36.PERFORM INITIALIZATION (SEE INITIALIZATION
)
ADJUSTMENT
1.INSPECT PARK/NEUTRAL POSITION SWITCH ASSY
a. Apply the parking brake and turn the ignition switch to the ON position.
b. Depress the brake pedal and check that the engine starts when the shift lever is set in the N or P
position, but does not start in other positions.
c. Check that the back-up light comes on and the reverse warning buzzer sounds when the shift lever
is set in the R position, but do not function in other positions.

Fig. 135: Installing Floor Shift Gear Shifting Rod Sub-Assy With Nut
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
51.CONNECT BATTERY NEGATIVE TERMINAL
52.ADJUST SHIFT LEVER POSITION (SEE ADJUSTMENT
)
53.INSPECT SHIFT LEVER POSITION (SEE ADJUSTMENT
)
54.PERFORM INITIALIZATION (SEE INITIALIZATION
)
ADJUSTMENT
1.INSPECT SHIFT LEVER POSITION
a. When shifting from the P to R position with the ignition switch on and brake pedal depressed, make
sure that the shift lever moves smoothly and moves correctly into position.
b. Start the engine and make sure that the vehicle moves forward when shifting from the N to D
position and moves rearward when shifting to the R position.
If operation cannot be done as specified, inspect the park/neutral position switch assy and check the shift
lever assy installation condition.
2.ADJUST SHIFT LEVER POSITION
a. Remove the nut and disconnect the shiftin
g rod from the connecting rod swivel.

a. Release the parking brake pedal.
b. With the engine running, depress the pedal and measure the pedal reserve distance, as shown in the
illustration.
Pedal reserve distance from asphalt sheet at 490 N (50 kgf, 110.2 lbf): More than 105 mm (4.13 in.)
If incorrect, troubleshoot the brake system.
Fig. 19: Checking Pedal Reserve Distance

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
19.INSTALL FLOOR CARPET ASSY FRONT
20.INSTALL FR DOOR SCUFF PLATE LH (SEE REPLACEMENT
)
21.INSTALL INSTRUMENT PANEL UNDER COVER SUB-ASSY NO.2 (SEE REPLACEMENT
)
22.INSTALL INSTRUMENT PANEL UNDER SAFETY PAD SUB-ASSY NO.1 (SEE
REPLACEMENT
)

34.CHECK AND ADJUST BRAKE PEDAL HEIGHT (SEE ON-VEHICLE INSPECTION )
35.CHECK PEDAL FREE PLAY (SEE ON
-VEHICLE INSPECTION )
36.CHECK PEDAL RESERVE DISTANCE (SEE ON
-VEHICLE INSPECTION )
37.INSTALL COMBINATION METER ASSY (SEE OVERHAUL
)
38.INSTALL INSTRUMENT CLUSTER FINISH PANEL (SEE REPLACEMENT
)
39.INSTALL INSTRUMENT PANEL UNDER COVER SUB-ASSY NO.2 (SEE REPLACEMENT
)
40.INSTALL INSTRUMENT PANEL AIR BAG ASSY LOWER NO.1 (SEE REPLACEMENT
)
41.INSTALL INSTRUMENT PANEL SAFETY PAD SUB-ASSY NO.1 (SEE REPLACEMENT
)
42.INSTALL OUTER MIRROR SWITCH ASSY
43.INSTALL COIN BOX ASSY
44.INSTALL INSTRUMENT PANEL UNDER COVER SUB-ASSY NO.1 (SEE REPLACEMENT
)
45.INSTALL INSTRUMENT CLUSTER FINISH PANEL CENTER LOWER
46.INSTALL INSTRUMENT CLUSTER FINISH PANEL END
47.INSTALL TURN SIGNAL SWITCH ASSY (SEE REPLACEMENT
)
48.INSTALL SPIRAL CABLE SUB-ASSY (SEE REPLACEMENT
)
49.INSTALL STEERING COLUMN COVER (SEE OVERHAUL
)
50.INSTALL STEERING WHEEL ASSY (SEE OVERHAUL
)
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51.INSTALL HORN BUTTON ASSY (SEE OVERHAUL
)
52.INSTALL STEERING WHEEL COVER LOWER NO.2
53.INSTALL SWITCH & VOLUME CASE
54.CONNECT BATTERY NEGATIVE TERMINAL
55.INSPECT SRS WARNING LIGHT (SEE DIAGNOSIS SYSTEM
)
56.PERFORM INITIALIZATION (SEE PRECAUTION
)
OVERHAUL
1.REMOVE ENGINE ROOM SIDE COVER
2.SEPARATE ENGINE ROOM NO.3 R/B
a. Remove the bolt and separate the engine room No.3 R/B.
3.DRAIN BRAKE FLUID
a. Draw out fluid with syringe.
4.REMOVE BRAKE MASTER CYLINDER SUB-ASSY
a. Remove the clamp from the 2 brake tubes.

Fig. 53: Installing Brake Tube To Brake Master Cylinder Sub-Assy And ABS & TRACTION
Actuator Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
14.FILL RESERVOIR WITH BRAKE FLUID
15.BLEED MASTER CYLINDER (SEE BLEEDING
)
16.BLEED BRAKE LINE (SEE BLEEDING
)
17.CHECK FLUID LEVEL IN RESERVOIR
18.CHECK FOR BRAKE FLUID LEAKAGE
If fluid leaks, tighten or replace the leaking part.
19.INSTALL ENGINE ROOM NO.3 R/B
a. Install the engine room No.3 R/B with a bolt.
20.INSTALL ENGINE ROOM SIDE COVER
COMPONENTS

pedal reserve distance.
b. Depress the brake pedal and start the engine. If the pedal goes down slightly, operation is normal.
If not, replace the brake booster.
Fig. 55: Identifying Brake Pedal Operation Check

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2.AIR TIGHTNESS CHECK
a. Start the engine and stop it after 1 or 2 minutes. Depress the brake pedal several times slowly.
If the pedal can be depressed to the floor the first time, but on the 2nd or 3rd time cannot be
depressed as far, the booster is airtight.
If not, replace the brake booster.
b. Depress the brake pedal while the engine is running, and stop the engine with the pedal depressed.
If there is no change in the pedal reserve travel after the pedal is held for 30 seconds, the booster is
air tight.
If not, replace the brake booster.

Fig. 56: Identifying Air Tightness Check
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
3.INSPECT VACUUM CHECK VALVE
a. Check that there is ventilation from the booster to engine, and no ventilation from the engine to the
booster.
b.If any fault is found, replace the vacuum check valve.

Fig. 57: Inspecting Vacuum Check Valve
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
REPLACEMENT
1.REMOVE ENGINE ROOM SIDE COVER
2.SEPARATE ENGINE ROOM NO.3 R/B
a. Remove the bolt and separate the engine room No.3 R/B.
3.DRAIN BRAKE FLUID
a. Draw out fluid with syringe.
4.REMOVE BRAKE MASTER CYLINDER SUB-ASSY
a. Remove the clamp from the 2 brake tubes.

1.CONNECT HAND-HELD TESTER:
a. Connect the hand-held tester to the DLC3.
b. Start the engine and run at idle.
c. Select the ACTIVE TEST mode on the hand-held tester.
HINT:
Please refer to the hand-held tester operators manual for further details.
Fig. 109: Connecting Hand
-Held Tester To DLC3
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2.INSPECT ACTUATOR MOTOR OPERATION
a. With the motor relay on, check the actuator motor operation noise.
b. Turn the motor relay off.
c. Depress the brake pedal and hold it for approximately 15 seconds. Check that the brake pedal
cannot be depressed.
d. With the motor rela
y on, check that the pedal does not pulsate.

SEAT BELT CONTROL ECU CONNECTOR TERMINALS RESISTANCE
1.COMMUNICATION STOP MODE TABLE
a. Check that there is no open circuit in the CAN main bus line, short between the lines, or short to +B
in the "CHECK CAN BUS LINE" (see CHECK CAN BUS LINE
). Select "BUS CHECK" on the
hand-held tester via the CAN VIM (see DIAGNOSIS SYSTEM
).
b. Check the communication stop mode of the ECUs or sensors not displayed among the following:
"ENGINE", "ECT", "CRUISE CONTROL", "ABS/VSC/TRAC", "YAW/DECELERAT",
"STEERING SENSOR", "BODY/GATEWAY", "BACK GUIDE MONITOR", "PSB" or "AIR
SUSPENSION".
PROBLEM SYMPTOMS
TerminalsWiring ColorConditionSpecified Condition
S63-4 (CANH) - S63-6 (CANL)B - WIgnition Switch OFF54 to 69 ohms
S63-4 (CANH) - S63-18 (GND)B - W-BIgnition Switch OFF1 kohms or more
S63-6 (CANL) - S63-18 (GND)W - W-BIgnition Switch OFF1 kohms or more
S63-4 (CANH) - S63-9 (BATT)B - BIgnition Switch OFF1 Mohms or more
S63-6 (CANL) - S63-9 (BATT)W - BIgnition Switch OFF1 Mohms or more
SymptomInspection ItemCustomizationSee Procedure
"ENGINE" and "ECT" are
not displayed on the hand-
held tester via CAN VIM.ECM
COMMUNICATION
STOP MODEApplicable to all
vehiclesECM
COMMUNICATION
STOP MODE
"ABS/VSCATRAC" is not
displayed on the hand-held
tester via CAN VIM.SKID CONTROL ECU
COMMUNICATION
STOP MODEApplicable to all
vehiclesSKID CONTROL ECU
COMMUNICATION
STOP MODE
"STEERING SENSOR" is
not displayed on the hand-
held tester via CAN VIM.STEERING SENSOR
COMMUNICATION
STOP MODEApplicable to all
vehiclesSTEERING SENSOR
COMMUNICATION
STOP MODE
"YAW/DECELERAT" is
not displayed on the hand-
held tester via CAN VIM.YAW RATE SENSOR
COMMUNICATION
STOP MODEApplicable to all
vehiclesYAW RATE SENSOR
COMMUNICATION
STOP MODE
DISTANCE CONTROL Applicable only to DISTANCE CONTROL