Test H: 4WD System Functional Test

Pinpoint Test H: 4WD System Functional Test

Test H1-H3:

Test H4-H10:

Test H11-H20:

Test H21:

NOTE: 4H and 4L modes are not intended for driving on hard/dry surfaces.

Normal Operation
When the vehicle is operating in 4WD High or Low, (4H/4L), all 4 wheels rotate at the same speed. The amount of traction the vehicle can achieve depends on the amount of traction each tire can establish with the road surface. In order for the 4WD system to operate correctly, each wheel/tire assembly must have matching sizes, and the front and rear axle ratios must match.

Possible Causes
^ 4x4 indicators
^ 4x4 module (PCM)
^ Transfer case and related components
^ Wheel/tire assemblies