Acura RL. Manual - part 749

Fig. 20: Electromagnetic Clutch System Operation Diagram 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

SEARCH COIL DETECTION SYSTEM 

As the clutch disks wear, the air gap between the pressure guides and the multi-plate clutches increases. The 
increase in air gap changes the magnetic field generated by the main coil and the yoke. The search coil 
detects these changes in the magnetic field, then the SH-AWD control unit uses predetermined maps to 
compensate for the changes to maintain precise control and smooth clutch engagement. 

 

2007 Acura RL 

2005-08 DRIVELINE/AXLES Rear Differential - RL

  

me 

 

Friday, June 05, 2009 3:02:18 PM

Page 23 

© 2005 Mitchell Repair Information Company, LLC. 

Fig. 21: Search Coil Detection System Diagram 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

SH-AWD SYSTEM OPERATION LIST  

Fig. 22: SH-AWD System Operation List 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 



When turning to the right, the magnitudes of 3 and 4 are transposed when compared with the left turn 
shown.  



Conditions of turn (direct coupling): For the turns with a lateral G of less than 0.075G when turning at 
a vehicle speed less than 30 km/h or over 120 km/h.  



Conditions of turn (speed acceleration): For the turns with a lateral G of more than 0.075G when 
turning at a vehicle speed between 30 to 120 km/h.  



Soft: 0-392 N.m (0-40 kgf.m) 

Medium: 392-785 N.m (40-80 kgf.m) 

Hard: 785-981 N.m (80-100 kgf.m) 

 

2007 Acura RL 

2005-08 DRIVELINE/AXLES Rear Differential - RL

  

me 

 

Friday, June 05, 2009 3:02:18 PM

Page 24 

© 2005 Mitchell Repair Information Company, LLC. 

Fig. 23: SH-AWD System Diagram 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

ELECTRIC CONTROL SYSTEM 

SH-AWD Control Unit Electrical Connections 

 

2007 Acura RL 

2005-08 DRIVELINE/AXLES Rear Differential - RL

  

me 

 

Friday, June 05, 2009 3:02:18 PM

Page 25 

© 2005 Mitchell Repair Information Company, LLC. 

Fig. 24: SH-AWD Control Unit Electrical Connections Diagram 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

SH-AWD CONTROL UNIT INPUTS AND OUTPUTS 

The SH-AWD control unit terminal voltages and the measuring conditions for the SH-AWD control system.

 

2007 Acura RL 

2005-08 DRIVELINE/AXLES Rear Differential - RL

  

me 

 

Friday, June 05, 2009 3:02:18 PM

Page 26 

© 2005 Mitchell Repair Information Company, LLC.