Hard Steering

Hard Steering
1. Check the power assist.
K20A2 engine, K20Z 1 engine models:
Is the starting load more than 38.2 N (3.9 kgf, 8.6 lbs)?
K20A3 engine model:
Is the starting load more than 37.2 N (3.8 kgf, 8.4 lbs)?
YES - Go to step 2.
NO - Power assist is OK.

2. Measure steady-state fluid pressure from the pump at idle with T/N 07406-0010001 or T/N 07406-001000A.
Is the pressure 1,470 kPa (15 kgf/cm2, 213 psi) or less?
YES - Go to step 3.
NO - Go to step 7.

3. Measure the pump relief pressure at idle with T/N 07406-0010001 or T/N 07406-001000A.
K20A2 engine model:
Is the pressure 7,160 - 7,850 kPa (73 - 80 kgf/cm2, 1,040 - 1,140 psi) or less?
K20Z 1 engine model:
Is the pressure 7,360 - 8,040 kPa (75 - 82 kgf/cm2, 1,070 - 1,170 psi) or less?
K20A3 engine model:
Is the pressure 6,570 - 7,260 kPa (67 - 74 kgf/cm2, 950 - 1,050 psi) or less?
YES - Go to step 4.
NO - Faulty pump assembly.

4. With a spring scale, measure the power assist in both directions, to the left and to the right.
Are the two measurements within 2.9 N (0.3 kgf, 0.66 lbs) of each other?
YES - Go to step 5.
NO - Go to step 8.

5. Measure the fluid pressure with T/N 07406-0010001 or T/N 07406-001000A with both pressure gauge valves open (if so equipped), while turning the steering wheel fully to the left and fully to the right.
K20A2 engine model:
Is the pressure 7,160 - 7,850 kPa (73 - 80 kgf/cm2, 1,040 - 1,140 psi) or less?
K20Z 1 engine model:
Is the pressure 7,360 - 8,040 kPa (75 - 82 kgf/cm2, 1,070 - 1,170 psi) or less?
K20A3 engine model:
Is the pressure 6,570 - 7,260 kPa (67 - 74 kgf/cm2, 950 - 1,050 psi) or less?
YES - Go to step 61
NO - Faulty gearbox.

6. Adjust the rack guide and retest.
Is the steering OK?
YES - Repair is completed.
NO - Faulty gearbox.

7. Check the feed and return lines between the pump and the gearbox for clogging and deformation.
Are the lines clogged or deformed?
YES - Repair or replace the lines.
NO - Faulty valve body unit or pump.

8. Check the cylinder lines for deformation.
Are the lines deformed?
YES - Replace the lines.
NO - Go to step 9.

9. 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 or readjust the rack guide.
NO - Faulty valve body unit.