How is toe adjusted on a rack and pinion suspension?

To adjust the toe on a rack and pinion suspension, it is essential to manipulate the inner tie rod. This is done by loosening the lock nut on the inner tie rod and then turning the inner tie rod itself. This movement changes the length of the tie rod, and consequently, it alters the angle of the wheels, which is critical for achieving proper toe alignment. Proper toe adjustment ensures that the wheels are aligned correctly relative to the centerline of the vehicle, which affects steering response, tire wear, and overall handling characteristics.

Other methods mentioned in the question are not appropriate for toe adjustment in a rack and pinion suspension system. For instance, simply rotating the outer tie rod does not provide the necessary changes in toe adjustments and often only affects the steering response rather than the toe setting. Adjusting the steering rack position is generally used for centering the steering wheel rather than for toe adjustments. Lastly, changing tire pressure does not influence the toe angle; it may affect ride characteristics but doesn't adjust the wheel alignment itself.