2017 Infiniti G37 Sedan V6-3.7L Diagnostic and Repair Information # 04-021D Date: 111121
Steering/Suspension - Wheel Alignment Information
Classification: WT04-005D
Reference: ITB04-021D
Date: November 21, 2011
WHEEL ALIGNMENT INFORMATION
This bulletin has been amended. The "Operations Performed Report" was added. Discard previous versions of this bulletin.
APPLIED VEHICLES: All Infiniti
SERVICE INFORMATION
^ When performing a wheel alignment it is important that you read and follow all of the instructions supplied with your alignment equipment.
^ The information in this bulletin is not intended to be complete wheel alignment instructions.
^ Use the information in this bulletin as a supplement to the instructions for your equipment.
General Information and Recommendations
1. Four-Wheel Thrust Alignment should always be performed.
^ This type of alignment is recommended for all Infiniti vehicles.
^ The four-wheel thrust process ensures that the vehicle is properly aligned and helps ensure proper entenng of the steering wheel.
Page 283
2. Use the right alignment machine.
^ You must use a quality alignment machine that will give accurate results when performing alignment checks.
^ Refer to the Infiniti TECH-MATE Service Equipment Catalog for recommended alignment equipment.
^ The alignment rack itself should be capable of accepting any Infiniti vehicle.
^ The rack should be checked to ensure that it is level.
3. Make sure the alignment machine is properly calibrated.
^ Your alignment equipment should be regularly calibrated in order to give accurate readings.
^ If any instrument that is part of the alignment machine is dropped or damaged calibration should be checked immediately.
^ Check with the manufacturer of your specific equipment for their recommended service/calibration schedule.
NOTE:
In order to properly document any warranty alignment claim the following item MUST be attached to the Repair Order:
^ A copy of the alignment machine printout showing the BEFORE and AFTER alignment readings.
IMPORTANT:
If you do not attach the above item to the Repair Order the claim may be denied (rejected or charged back).
ALSO:
^ A copy of the yearly alignment machine calibration certification must be held on file in the Service Dept.
^ When finished complete the Operations Performed Report and attach it to the repair order.
4. Make sure the "turn plates" and "slide plates" are in good working order:
^ The surface of the front turn plates must be level with (the same height as) the rack surface.
^ If height is not the same; have the equipment repaired before performing any alignments.
Page 284
^ Make sure the front turn plates:
> Do not wobble (no up/down movement).
> Operate (slide and turn) smoothly in all directions.
If there is any issue with the turn plate operation - have the equipment repaired before performing any alignments.
^ Make sure the rear slide plates:
> Do not wobble (no up/down movement).
> Operate (slide) smoothly in all directions.
If there is any issue with the slide plate operation - have the equipment repaired before performing any alignments.
5. Make sure the lock pins for the front "turn plates" and rear "slide plates" are in place.
NOTE:
Lock pins should remain in place until caster sweep.
The Alignment Process
IMPORTANT:
Use only the alignment specifications listed in the appropriate Service Manual when adjusting the alignment.
1. Make sure the vehicle is straight on the alignment rack.
Page 285
^ Vehicle must be straight (in line) with the alignment rack before entering the rack as shown in Figure 4.
^ Do not straighten the vehicle while on the rack (see Figure 5).
^ If the vehicle needs to be straightened exit the alignment rack straighten the vehicle and then re-enter the rack.
^ Once the vehicle is straight on the rack do not turn/center the steering wheel-keep the front wheels straight.
2. Position vehicle on the front turn plates as follows:
^ Stop vehicle just behind the turn plates.
^ Center the turn plates to the tires.
Page 286
^ Move the vehicle onto the turn plates by turning/pushing the rear wheel.
DO NOT push/pull on the vehicle body.
^ Center the front wheels on the turn plates.
^ Chock the left rear wheel.
Preliminary Checks:
3. Perform pre-alignment checks.
^ Tire condition (wear partial wear flaws etc.)
^ Road wheel condition (damage and deformation)
^ Tire pressure
Page 287
^ Inspect for visible damage to any suspension components
^ Wheel bearing axial play
^ Ball joints of suspension arms
^ Shock absorber operation and visual check for oil leakage
^ Condition of axle and suspension (check for bushing cracks and slack)
^ Vehicle weight
> Empty - no cargo luggage or passengers
> Fuel level is full
> Engine coolant and lubricating oils at specified levels
> Spare tire, jack, hand tools, and floor mats in designated positions
NOTE:
Refer to the appropriate Service Manual for information about any of the above checks and inspections.
4. Check the target mounts.
^ If there is any visual damage (bent, worn, cracked, etc) have the equipment repaired before performing any alignments.
^ Make sure the target mounts are properly adjusted and configured (see Figure 11).
NOTE:
The target mount example shown in Figure 11 is for Hunter "camera type" alignment machines. Follow the operation manual for your specific
equipment.
5. Make sure the targets are mounted correctly.
Page 288
^ Mount the top claws first.
^ Claws must be flush against the wheel as shown in Figure 13.
^ Target must be flush against the center support as shown in Figure 14.
Page 289
^ Make sure the targets are positioned with the arrow UP or level.
IMPORTANT:
Once you have set the target position, DO NOT reset it at anytime during the alignment process.
6. Begin the alignment procedure.
^ Follow all of the instructions for your particular equipment.
^ Refer to the Service Manual for alignment specifications.
If your equipment requires "rolling compensation", follow these additional tips:
Page 290
^ DO NOT push or pull on the vehicle body.
IMPORTANT:
After performing "rolling compensation", DO NOT reset the target position.
When performing "caster sweep". follow these tips:
^ Apply the brakes as shown.
^ Start the engine to allow brake boost.
^ Turn the engine OFF.
^ Remove all lock pins - front "turn plates" and rear "slide plates".
^ Make sure the bridge plate will not interfere with movement of the turn plate.
Page 291
Put the bridge plate in the down position.
^ Perform caster sweep by turning the steering wheel from outside the vehicle.
^ DO NOT push/pull on the tire to perform the caster sweep.
7. Make sure the steering wheel is centered when performing toe-in measurements and adjustments.
NOTE:
If you are using a Hunter alignment machine equipped with the WinToe(R) Alignment Adiustment System:
^ There is no need to lock the steering wheel. The WinToe(R) system is not affected by steering system movement during the adjustment process.
^ Bumping the tire or re-centering the steering wheel when adjusting near frozen tie rods is not necessary. This makes the adjustment process faster
and easier.
^ WinToe(R) eliminates the effect of lash in the steering system.
If you are using a John Bean alignment machine eguiDDed with EZ Toe:
^ There is no need to lock the steering wheel. The EZ Toe system is not affected by steering system movement during the adjustment process.
^ This software routine is an improved method of setting front toe making it easier to obtain a centered steering wheel.
^ With EZ Toe it is possible to adjust toe with the steering wheel turned at any angle left or right. This is helpful when setting toe on engine wall
mounted rack and pinion units.
IMPORTANT:
If during the alignment process the vehicle was lifted off of the rack; after lowering make sure to jounce (bounce) the vehicle before confirming
adjustments are correct.
After you have checked and adjusted vehicle alignment
Page 292
8. Print the BEFORE and AFTER measurements and attach them to the Repair Order.
9. Road test the vehicle to make sure the steering wheel is "centered" when driving on a straight flat road.
Page 293
10. When finished complete the Operations Performed Report above and attach it to the repair order.
Warranty Claim Information:
In order to properly document any warranty alignment claim the following item MUST be attached to the Repair Order:
^ A copy of the alignment machine printout showing the BEFORE and AFTER alignment readings.
IMPORTANT:
If you do not attach the above item to the Repair Order the claim may be denied (rejected or charged back).
ALSO:
^ A copy of the yearly alignment machine calibration certification must be held on file in the Service Dept.
^ When finished complete the Operations Performed Report and attach it to the repair order.
