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Acura RL. Manual - part 814

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 9,604-9,996 kPa (98-102 kgf/cm

, 1,392-1,448 psi) or more?

YES - Go to step 7.

NO - Faulty steering gearbox.

7. Adjust the rack guide (see STEERING LOCK REPLACEMENT ), and retest.

Is the steering OK?

YES - Repair is completed.

NO - Faulty steering gearbox.

8. Check for feed and return lines between the pump and the steering gearbox for clogging and

deformation.

Are the lines clogged or deformed?

YES - Repair or replace the lines.

NO - Faulty valve body unit.

9. Disassemble the pump (see PUMP OVERHAUL).

10. Check the flow control valve for smooth movement and leaks (see step 9 ).

Is the flow control valve OK?

YES - Faulty pump assembly.

NO - Faulty flow control valve.

11. Check the cylinder lines A and B for deformation (see POWER STEERING HOSE, LINE, AND

PRESSURE SWITCH REPLACEMENT ).

Are the A or B lines deformed?

YES - Replace the lines.

NO - Go to step 12.

12. 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.

2007 Acura RL

2005-08 STEERING Steering - RL

Friday, June 05, 2009 2:20:15 PM

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NO - Faulty valve body unit.

STEERING WHEEL ROTATIONAL PLAY CHECK

1. Turn the front wheels to the straight ahead position.

2. Measure how far you can turn the steering wheel left and right without moving the front wheels.



If the play is within the limit, the steering gearbox and linkages are OK.



If the play exceeds the limit, adjust the rack guide (see STEERING LOCK
REPLACEMENT). If the play is still excessive after rack guide adjustment, inspect the
steering linkage and steering gearbox (see STEERING LINKAGE AND GEARBOX
INSPECTION).

Rotational play: 0-10 mm (0-0.39 in.)

Fig. 3: Identifying Steering Wheel Rotational Play
Courtesy of AMERICAN HONDA MOTOR CO., INC.

POWER ASSIST CHECK

1. Check the power steering fluid level (see FLUID CHECK/REPLACEMENT ).

2. Start the engine, let it idle, and turn the steering wheel from lock-to-lock several times to warm up the

fluid.

3. Attach a commercially available spring scale to the steering wheel. With the engine idling and the

vehicle on a clean, dry floor, pull the scale as shown and read it as soon as the tires begin to turn.



If the scale reads no more than the specification, the steering gearbox and pump are OK.



If the scale reads more than the specification, troubleshoot the steering system (see
SYMPTOM TROUBLESHOOTING).

Initial turning load: 29 N (3.0 kgf, 6.6 lbf)

NOTE:

This test should be done with original equipment tires and wheels at the
correct tire pressure.

2007 Acura RL

2005-08 STEERING Steering - RL

Friday, June 05, 2009 2:20:15 PM

Page 8

Fig. 4: Attaching Spring Scale To Steering Wheel
Courtesy of AMERICAN HONDA MOTOR CO., INC.

STEERING LINKAGE AND GEARBOX INSPECTION

Fig. 5: Inspecting Steering Linkage And Gearbox Components
Courtesy of AMERICAN HONDA MOTOR CO., INC.

PUMP PRESSURE TEST WITH T/N 07406-0010001

Special Tools Required

2007 Acura RL

2005-08 STEERING Steering - RL

Friday, June 05, 2009 2:20:15 PM

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

P/S joint adapter (pump) 07VAK-P8A011A



P/S joint adapter plate (pump) 07VAK-P8A012B



P/S joint adapter (hose) 07RAK-S040122



P/S pressure gauge 07406-0010001

Check the fluid pressure as follows to determine whether the trouble is in the pump or steering gearbox.

1. Remove the right front fender trim (A).

Fig. 6: Identifying Right Front Fender Trim
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2. Check the power steering fluid level (see FLUID CHECK/REPLACEMENT ).

3. Disconnect the pump outlet hose (A) from the pump outlet with care so as not to spill the power

steering fluid on the frame and other parts, then install the P/S joint adapter (pump) on the pump
outlet (B) with the P/S joint outlet plate.

Fig. 7: Installing P/S Pressure Gauge To P/S Joint Adapter (Pump) With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.

4. Connect the P/S joint adapter (hose) to the P/S pressure gauge, then connect the pump outlet hose to

the P/S joint adapter (hose).

5. Install the P/S pressure gauge to the P/S joint adapter (pump).

6. Fully open the shut-off valve (A).

2007 Acura RL

2005-08 STEERING Steering - RL

Friday, June 05, 2009 2:20:15 PM

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