Nissan and Datsun Workshop Manuals
NV2500 HD V8-5.6L (VK56DE) (2012)
Maintenance > Alignment > System Information > Technical Service Bulletins > All Technical Service Bulletins for Alignment: > 08-097D > Apr > 11 > Steering/Suspension - Pull Or Drift Diagnostics > Page 11
Replace the tire(s) or use known good tires from another vehicle for all road tests and diagnostics in this bulletin.
^ Make sure tire pressure is set to the correct specification.
1. Install the following measuring tools on the vehicle:
^ Steering Wheel Offset Gauge
^ Road Crown Gauge
Refer to "Special Tool" for a description of these tools and an explanation of their use.
2. Obtain a watch with a second hand (preferably a stopwatch) to use during the road test.
3. Take the vehicle for a road test and confirm the customers concern.
^ Select a flat road where the vehicle can be driven in a straight line at a preferred speed of 60 mph.
^ During the road test make sure the vehicle is pointing straight. Don't worry about steering wheel position during the road test.
^ If you adjusted the tire pressure or changed the tires before the road test, the issue may have been resolved.
^ If there are cross winds strong enough to affect the vehicle's straight line movement, then diagnosis cannot be performed.
4. Determine the vehicles issue - refer to the definitions of "Pull" and Steering Wheel "Off-center" below.
5. When the road test is completed, remove the Road Crown Gauge, leave the Steering Wheel Off-Set Gauge in place until the Service Procedure is
6. Refer to the Flow Chart above for the next step.
Other Service Information
Customers may report that their vehicle's steering wheel is "off-center" because the steering wheel spokes are tilted to the left or right when the vehicle
If a vehicle's steering wheel spokes are slightly off center while driving straight, it may be the normal result of road crown. Most roads in the United
Vehicles have a natural tendency to drift to the low side of the crown. The greater the slope of the crown, the faster the vehicle will drift in that direction.
Tires and vehicles are designed to counteract the effect of typical road crown, but may not fully counteract the effect of a highly crowned road.
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