Acura RL. Manual - part 834

Fig. 154: Identifying Boot And Boot Installation Sections 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

REPLACEMENT 

1. Remove the steering gearbox (see STEERING GEARBOX REMOVAL ).  

2. Position the 34 mm socket wrench (A) on the flange part of the gearbox housing with a washer (B), a 

10 x 105 mm flange bolt (C), and a 10 mm nut (D) as shown. 

Fig. 155: Removing Gearbox Mount Cushion 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

3. Hold the flange bolt with a wrench, and tighten the nut with another wrench. Remove the gearbox 

mount cushion (E).  

4. Apply a mild soap and water solution to the new gearbox mount cushion surface (A), then place it on 

the gearbox mounting cushion hole. 

 

2007 Acura RL 

2005-08 STEERING Steering - RL

  

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Fig. 156: Installing Gearbox Mount Cushion 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

5. Position the 34 mm socket wrench on the flange part of the gearbox housing with a washer, a flange 

bolt, and a nut as shown.  

6. Install the gearbox mount cushion by tightening the nut until the mount cushion edges (B) properly fit 

on the gearbox flange surface.  

ELECTRONICALLY CONTROLLED POWER STEERING SYSTEM 

COMPONENT LOCATION INDEX 

 

2007 Acura RL 

2005-08 STEERING Steering - RL

  

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Fig. 157: Identifying Electronically Controlled Power Steering System Component Location 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

SYSTEM DESCRIPTION 

System Outline 

This vehicle is equipped with an Electronically Controlled Power Steering System (ECPS). Depending on 
the vehicle speed, the ECPS control unit controls the ECPS valve. The ECPS valve changes the P/S fluid 

 

2007 Acura RL 

2005-08 STEERING Steering - RL

  

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pressure of the pressure side of the power cylinder. By controlling the P/S fluid pressure electrically, it made 
possible to supply stable P/S fluid pressure to the power cylinder that ensures the steering feel that is not 
influence the fluctuation of the engine speed, and corresponds to the driving situation. 

Fig. 158: Electronically Controlled Power Steering System - System Diagram 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Flow control valve 

This valve stabilizes the oil P/S fluid pressure of the power steering pump output. 

ECPS valve assy 

The spool valve built in the ECPS valve assy is operated by the stepping motor which is controlled by the 
ECPS control unit. It changes the P/S fluid pressure to the power cylinder. When this valve closes, the 
pressure to the power cylinder increases. 

Valve body unit 

The rotary valve built in the valve body unit is driven by the rotation of the steering wheel. This changes the 
oil passage between the power steering pump side, power cylinder side, reservoir side, and the ECPS valve 
side. 

Kickback valve 

When kickback is occurred from steering rack, the kickback valve in the feed port decreases the kickback to 
the steering wheel. 

VFV (Variable force control valve) 

The valve attenuates rapid P/S oil pressure change.

 

2007 Acura RL 

2005-08 STEERING Steering - RL

  

me 

 

Friday, June 05, 2009 2:20:15 PM

Page 90 

© 2005 Mitchell Repair Information Company, LLC.