Hard steering
- Compare to a known-good vehicle that is the same trim level.
- Check for suspension damage.
- Check the steering alignment.
- Check the tire condition and pressure.
- Check the power assist (see POWER ASSIST CHECK
).
Is the initial turning load more than 29 N (3.0 kgf, 6.6 lbf)?
YES -Do the pump pressure test with T/N 07406-0010001 (see PUMP PRESSURE TEST WITH T/N 07406-0010001 ), T/N 07406-001000A or T/N 07406-001A101 (see PUMP PRESSURE TEST WITH T/N 07406-001000A OR T/N 07406-001A101 ). If the pressure test is within specification, go to step 2.
NO -Power assist is OK at this time.
- Using a spring scale, measure the power assist in both directions, to the left and to the right.
Are the two measurements within 5.0 N (0.51 kgf, 1.12 lbf) of each other?
YES -Go to step 3.
NO -Go to step 5.
- Measure the fluid pressure with both pressure gauge valves open (if so equipped), while turning the steering wheel fully to the left and fully to the right.
Is the pressure 8, 600-9, 100 kPa (87.69-92.79 kgf/cm 2 , 1, 247.3-1, 319.9 psi) or more in both directions?
YES -Go to step 4.
NO -Faulty steering gearbox. Overhaul the steering gearbox (see STEERING GEARBOX OVERHAUL ).
- Adjust the rack guide (see RACK GUIDE ADJUSTMENT
), and retest.
Is the steering OK?
YES -Repair is completed.
NO -Faulty steering gearbox. Overhaul the steering gearbox (see STEERING GEARBOX OVERHAUL ).
- Check the cylinder lines for deformation (see POWER STEERING HOSE, LINE, AND PRESSURE SWITCH REPLACEMENT
).
Are any of the line(s) deformed?
YES -Replace the deformed line(s).
NO -Go to step 6.
- Check for a bent rack shaft or misadjusted rack guide (too tight).
Is the rack shaft bent or the rack guide adjusted too tight?
YES -Replace the rack shaft, or readjust the rack guide preload (see RACK GUIDE ADJUSTMENT ).
NO -Faulty valve body unit. Replace the valve body unit (see step 15 ).