Honda Accord: Symptom Troubleshooting - Hydraulic Power Steering Components - Steering - Honda Accord MK8 2008-2012 Service ManualHonda Accord: Symptom Troubleshooting

Hard Steering

NOTE: -Compare to a known-good vehicle that is the same trim level.

-Check for suspension damage.

m Check the steering alignment.

-Check the tire condition and pressure.

1. Check the power assist (see page 17-4).

Is the Initial turning load more than 29.4 N (3.0 kgf, 6.6 Ibf)? YES

-Go to step 2. NO

-Power assist is OK at this time. Compare to a known-good vehicle.

2. Connect the pump joint adapter or P/S joint adapter (pump), hose joint adapter, and P/S pressure gauge T/N 07406- 0010001 (see page 17-25), T/N 07406- 001000A or T/N 07406-001A101 (see page 17-26) to the pump.

3. Measure steady-state fluid pressure from the pump at idle.

Is the pressure 1,470 kPa (15 kgf/cm2, 213 psi) or less? YES

-Go to step 4.

NO

-Go to step 8.

4. Measure the pump relief pressure at idle.

Is the pressure 8,140-8,830 kPa (83-90 kgf/cm2, 1,180-1,280 psi) or more? YES

-Go to step 5.

NO

-Replace the pump assembly (see page 17-30).

5. 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 Ibf) of each other? YES

-Go to step 6.

NO

-Go to step 9.

6. 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 8,140-8,830 kPa (83-90 kgf/cm2, 1,180—1,280 psi) or more in both directions? YES

-Go to step 7.

NO

-Faulty steering gearbox. Overhaul the steering gearbox (see page 17-45).H 7. Adjust the rack guide (see page 17-17), and retest.

Is the steering OK? YES

-Repair is completed.

NO

-Faulty steering gearbox. Overhaul the steering gearbox (see page 17-45).

8. Check the outlet and return hoses and the lines between the pump and the steering gearbox for clogging and deformation.

Are the lines clogged or deformed? YES

-Replace the lines.S NO

-Faulty valve body unit. Overhaul the valve body unit (see page 17-45).H 9. Check the cylinder lines for deformation (see page 17-29).

Are any of the line(s) deformed? YES

-Replace the deformed line(s).H NO

-Go to step 10.

10. 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.

NO

-Faulty valve body unit. Overhaul the valve body unit (see page 17-45).

    Symptom Troubleshooting Index
    Find the symptom in the chart below, and do the related procedures in the order listed until you find the cause. ...

    Pump Pressure Test w i th T/N 07406-0010001
    Special Tools Required -Pump Joint Adapter 07RAK-S040111 or P/S Joint Adapter (pump) 07RAK-S040110 -Hose Joint Adapter 07RAK-S040122 -P/S Pressure Gauge 07406-0010001 Check the fluid pressure as ...

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