Preparation: Measuring Balance and RFV

1. Confirm vibration/flutter complaint.

2. Warm up tires to normal operating temperatures to remove cold-soak flat spots. (Drive 10 minutes at 65 mph.)

NOTE

Road test the vehicle at the same speeds and on the same type of road surfaces as the customer complaint.

Does vibration/flutter decrease after the tires warm up?

^ YES - Tires are temporarily flat spotting. This TSIB does NOT apply. Return vehicle to customer.

^ NO-Go to step 3.





3. Proceed with checking the wheel balance and RFV (radial force variation). Balance the tire and wheel assembly using the correct wheel balance attachments.





A. Mount the tire/wheel assembly to the balancer machine as illustrated in Figure 2.

Is RFV within acceptable levels?

RFV limit is 26 lbs. Please be aware that this limit is based on recommendations from automotive industry standards and tire manufacturers. Do not use this limit as the only basis for tire replacement.

^ YES - Continue to next step.

^ NO - Phase match tires until within acceptable levels.

NOTE

If root cause was a balance or RFV out of range, use the Op Code listed in the Warranty Information section for wheel balance adjustment. Do NOT use the Op Code listed if steering control valve preset spring is NOT replaced.

B. Test drive the vehicle again. If a vibration remains is the vibration/flutter felt primarily through the steering wheel?

^ YES - Proceed to next section to replace the power steering control valve preset spring.

^ NO - Vibration source may be coming from elsewhere. Refer to the Repair Manual to diagnose source of vibration.