2005 LEXUS ES300 Repair Manual

REPAIR MANUAL SUPPLEMENT: VEHICLE PULLING TO ONE SIDE ± ST004-01 RevisedDecember 21, 2001
Page 6 of 11
1. IMPORTANT NOTICE
Before repairing vehicle pulling to one side, it is necessary to clearly identify the
cause of the pulling condition. Frequently, the cause of the vehicle pulling to one side
is diagnosed as wheel alignment. However, the actual cause may be lateral force
generated by the tires. Performing wheel alignment when tire force is the cause could
result in the wheel alignment being set at a value outside of specifications. This would
then cause other problems such as uneven tire wear, etc.
2. Troubleshooting
First determine whether vehicle pulling to one side is caused by a wheel alignment
problem or tire characteristics, then decide which repairs to make.
A. Perform the following checks and correct as necessary.
a. Check tires for size, wear and for proper inflation pressure.
b. Check whether the vehicle is noticeably tilted backward/forward or left/right.
NOTE:
Tilting of the vehicle produces a left±right difference in the camber and caster and can
cause vehicle pulling to one side.
c. Check brakes for dragging.
B. Confirm problem symptoms.
With the customer accompanying you, drive the vehicle to confirm if the
customer 's complaint involves vehicle pulling to one side or steering wheel off
center. If the problem is steering wheel off center, adjust the front tie rods on the
vehicle. Refer to Lexus TSIB ST002±01. Also check the direction of vehicle
pulling and the extent of the pulling.
C. Decide if vehicle pulling is due to wheel alignment or tires.
a. Switch the left and right front tires (If the tires are non±unidirectional).
b. Conduct a drive test to check whether the direction that the vehicle pulls has
changed.
SYMPTOMPROBABLE CAUSECORRECTIVE ACTION
No change in vehicle
pulling conditionFront wheel alignmentProceed to Repair Procedure 3. Vehicle pulling
caused by Wheel Alignment (Page 6)
Vehicle pulling
eliminatedTire conicityRepair complete. Vehicle Pulling Caused by Tire
Conicity (Page 3 and 6)
Vehicle pulling
direction is reversedTire conicityProceed to Repair Procedure 4. Vehicle Pulling
Caused by Tire Conicity (Page 7)
Repair
Procedures

REPAIR MANUAL SUPPLEMENT: VEHICLE PULLING TO ONE SIDE ± ST004-01 RevisedDecember 21, 2001
Page 7 of 11
Helpful hints to determine cause of vehicle pulling:
The direction of lateral force from tire conicity becomes reversed when the left and
right tires are switched. Therefore, if the pulling direction changes when the tires are
switched, it can be concluded that vehicle pulling is caused by tire conicity.
ORIGINAL TIRE POSITIONS TIRES SWITCHED
The Vehicle is Pulled to the Right by
the Lateral Force Exerted to the Right.The Direction of the Tires Which Exerted Lateral
Force to the Right has Been Changed, so the Tires
Now Exert Lateral Force to the Left and the Vehicle
Now Pulls to the Left. Vehicle Pulling
Direction (Right)Vehicle Pulling
Direction (Left)
Lateral Force by
ConicityLateral Force by
Conicity
If the pulling direction does not change after the front tires are switched, the cause of
vehicle pulling is not tire conicity. In this case, the likely cause is a front wheel
alignment condition.
3. Vehicle Pulling Caused by Wheel Alignment
When it is determined by troubleshooting that the vehicle pulling to one side is
caused by wheel alignment, perform repairs according to the following procedure.
Vehicle Pulling to One Side
Check Front Wheel Alignment
Not Within SpecificationWithin Specification
Adjust Front Wheel Alignment
Vehicle Still Pulls
Road Test
Within Specification But
Vehicle Pulls
OK
Adjust Cross Camber to Eliminate Vehicle Pulling
NOTE: Do not exceed 1
of cross camber.
Repair
Procedures
(Continued)

REPAIR MANUAL SUPPLEMENT: VEHICLE PULLING TO ONE SIDE ± ST004-01 RevisedDecember 21, 2001
Page 8 of 11
WHEN VEHICLE PULLS TO LEFTWHEN VEHICLE PULLS TO RIGHT
Increase right front camber and decrease left
front camber until vehicle pulling is eliminatedIncrease left front camber and decrease right
front camber until vehicle pulling is eliminated
NOTE:
Keep the cross camber within 1
or less.
Keep the camber of each wheel within specifications (+/±45' of center value).
If adjustment exceeds the specifications, uneven tire wear will result.
4. Vehicle Pulling Caused by Tire Conicity
When it is determined by troubleshooting that the vehicle pulling to one side is
caused by tire conicity, perform repairs according to the following procedures.
Indication of Tire Conicity as a Cause:
When the front tires are switched, the pulling direction changes. Proceed to STEP 1.
STEP 1:
Remove the front left tire from the wheel and reverse the tire. Then perform a road
test and check for change in the pulling direction.
HINT:
By performing this operation, it can be checked whether the left or right tire exerts a
stronger lateral force. Either tire can be reversed. Shown here is an example of the left
tire reversed.
ORIGINAL TIRE POSITIONS
Vehicle Pulling
Direction
Lateral Force by
Conicity (Larger)
Lateral Force by
Conicity (Smaller) Lateral Force by
Conicity (Smaller)Lateral Force by
Conicity (Larger)
Vehicle Pulling Direction
(Same Direction)
Reversed
If Vehicle Pulls in the Same Direction: Go to STEP 2.
The lateral force generated by the right front tire is greater than the left tire, so
the vehicle is pulling due to the lateral force of the right tire.
LEFT TIRE REVERSE INSTALLATION
Repair
Procedures
(Continued)

REPAIR MANUAL SUPPLEMENT: VEHICLE PULLING TO ONE SIDE ± ST004-01 RevisedDecember 21, 2001
Page 9 of 11
ORIGINAL TIRE POSITIONS
LEFT TIRE REVERSE INSTALLATION
Vehicle Pulling
Direction
Lateral Force by
Conicity (Smaller)
Lateral Force by
Conicity (Larger) Lateral Force by
Conicity (Larger)Lateral Force by
Conicity (Smaller)
Vehicle Pulling
Direction
(Opposite Direction)
Reversed
If Vehicle Pulls in the Opposite Direction: Go to STEP 2.
The lateral force generated by the left front tire is greater than the right tire, so
the vehicle is pulling due to the lateral force of the left tire.
If Vehicle Pull Is Eliminated: Repair Is Now Complete.
The lateral force generated by the left and right front tires is virtually the same, so the
lateral force is neutralized and the vehicle travels straight ahead. The repair operation
is now completed.
STEP 2:
Rotate the larger
lateral force front tire with the rear tire and check the change in the
vehicle pulling.
NOTE:
By shifting the front tire with the larger lateral force to the rear, the vehicle pulling
level is usually reduced.
If Vehicle Is Still Pulling: Go to STEP 3.
If Vehicle Pull Is Eliminated: Repair Is Now Complete.
Repair
Procedures
(Continued)

REPAIR MANUAL SUPPLEMENT: VEHICLE PULLING TO ONE SIDE ± ST004-01 RevisedDecember 21, 2001
Page 10 of 11
STEP 3:
Adjust cross camber to eliminate vehicle pulling.
HINT:
If the tires are placed in the positions they were in during tire rotation when the least
amount of vehicle pulling occurred, wheel alignment can be performed with a minimal
amount of adjustment.
WHEN VEHICLE PULLS TO LEFTWHEN VEHICLE PULLS TO RIGHT
Increase right front camber and decrease left
front camber until vehicle pulling is eliminatedIncrease left front camber and decrease right
front camber until vehicle pulling is eliminated
NOTE:
Keep the cross camber within 1
or less.
Keep the camber of each wheel within specifications (+/±45' of center value).
If adjustment exceeds the specifications, uneven tire wear will result.
5. Camber Adjustment Method
NOTE:
After the camber has been adjusted,
inspect the toe±in.
NOTE:
The method of camber adjustment
differs for different models, so please
refer to the repair manual of the
vehicle involved. (This is a sample
from the RX 300 Repair Manual).
A. Remove the front wheels and
ABS speed sensor clamp.
B. Remove the two nuts on the lower
side of the shock absorber.
C. Coat the threads of the nuts with
engine oil.
D. Temporarily install the two nuts.
E. Adjust the camber by pushing or
pulling the lower side of the shock
absorber in the direction in which
the camber adjustment is
required.
F. Tighten the nuts.
Torque: 210 Nm
(2,150 kgfcm, 155 ftlbf)
Repair
Procedures
(Continued)
1
2

REPAIR MANUAL SUPPLEMENT: VEHICLE PULLING TO ONE SIDE ± ST004-01 RevisedDecember 21, 2001
Page 11 of 11
G. Install the front wheels.
Torque: 103 Nm (1,050 kgfcm, 76 ftlbf)
H. Check the camber.
NOTE:
Adjusting value for the set bolts
is
6' ± 30' (0.1
± 0.5
).
When making an adjustment of more
than 45', replace the upper and lower
steering knuckle set bolts with the
adjusting bolts
. If the camber is not
within the specification, use the table
shown to estimate how much
additional camber adjustment will be
required, and select the appropriate
camber adjusting bolt.
I. Follow steps 5±a through 5±h
again. Between steps 5±b and
5±c, exchange one or two
selected bolts.
HINT:
When exchanging the two bolts,
exchange one bolt each time.
If Vehicle Pull Is Eliminated: Repair Is Now Complete.
If Vehicle Is Still Pulling: Contact Your Regional Office For Further Assistance.
Repair
Procedures
(Continued)

Lexus Supports ASE CertificationPage 1 of 3
Title:
ECM RESET MEMORY FUNCTION
Models:
'98 ± '05 Applicable Models
Technical Service
Information Bulletin
May 5, 2003
TC002-03
TSIB REVISION NOTICE:
December 20, 2004: Applicable Vehicles section has been updated and modified,
2004 and 2005 model years added; and Reset Procedure 2 has been revised.
Previous versions of this TSIB should be discarded.
Whenever an automatic transmission is replaced, overhauled or individual components
are replaced, use this procedure to erase Engine Control Module (ECM, SAE term:
Powertrain Control Module, PCM) ªLearned Valuesº and minimize subsequent
performance concerns.
CAUTION:
Failure to follow the following procedure may lengthen the time to readjust the
ªLearned Values,º potentially resulting in performance concerns.
Refer to Reset Procedure 1 for the following vehicles with Electronically Controlled
Automatic Transmissions:
1999 ± 2003 model year ES 300 and RX 300 vehicles.
2003 ± 2005 model year GX 470 vehicles.
2004 ± 2005 model year RX 330 vehicles.
Refer to Reset Procedure 2 for the following vehicles with Electronically Controlled
Automatic Transmissions:
1998 ± 2005 model year GS 430/400/300, LS 430/400, LX 470, and
SC 430/400/300 vehicles.
2001 ± 2005 model year IS 300 vehicles.
OP CODEDESCRIPTIONTIMEOFPT1T2
N/ANot Applicable to Warranty±±±±
TRANSMISSION & CLUTCH
Introduction
Applicable
Vehicles
Warranty
Information

RESET MEMORY FUNCTION ± TC002-03 Revised May 5, 2003
Page 2 of 3
SPECIAL SERVICE TOOLS (SSTs)PART NUMBERQUANTITY
Lexus Diagnostic Tester Kit*010012701
CAN Interface Module Kit*010027441
12 Megabyte Diagnostic Tester Program Card
with version 12.01a Software (or later)*01002593-0051
* Essential SSTs.
NOTE:
Additional Diagnostic Tester Kits, CAN Interface Modules, Program Cards or other
SSTs may be ordered by calling SPX/OTC at 1-800-933-8335.
1. Connect the Lexus Diagnostic Tester to the vehicle.
2. Reset the ECM (PCM). Refer to the procedures below.
DO YOU WISH TO
RESET THE ECM?
[YES] to CONTINUE
[NO] to EXIT
2: CUSTOMIZE
3: ECU REPROGRAMFUNCTION SELECT FOR
NORTH AMERICA
B
*APPLICATION SELECT*
A
1: DIAGNOSISDIAGNOSTIC MENU
ENGINE
C
DO NOT USE THIS
FUNCTION UNLESS
INSTRUCTED BY
REPAIR MANUAL.RESET MEMORY
E
RESET MEMORY
NOTICE
D
[YES]
F
1: OBD/MOBD
3: CARB OBD II
4: BREAK±OUT BOX
5: NVH
6: AUTOPROBE
7: 02 RPM CHECK
8: SNAPSHOT REVIEW
9: SETUP
0: GAS ANALYSIS2: ENHANCED OBD II1: DATA LIST
2: DTC INFO
3: ACTIVE TEST
4: SNAPSHOT
5: SYSTEM CHECK
6: RESET MEMORY
7: MONITOR STATUS
8: CHECK MODE
6: RESET MEMORY
ONLY USE AFTER
REPLACING THE ENGINE,
AUTO TRANS, OR ECM
ON CERTAIN VEHICLES.EXECUTING THIS
FUNCTION WILL RESET
THE LEARNED VALUES
IN THE ECM.RESET MEMORY
RESETTING COMPLETE
PRESS
[ENTER]
3. Start the engine and warm it up to normal operating temperatures before test±driving.
4. Perform a thorough test drive with several accelerations from a stop with ªlight
throttleº application until proper transmission shifting is verified.
Required
SSTs
Reset
Procedure 1