Acura RL. Manual - part 755

Fig. 50: Checking Continuity Between SH-AWD Control Unit Connector Terminal A18 And 
Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Repair short to body ground in the wire between SH-AWD control unit connector A and the 
hypoid gear speed sensor connector. 

NO - Go to step 22. 

22. Check for continuity between SH-AWD control unit connector terminal A5 and hypoid gear speed 

sensor 3P connector terminal No. 3. 

Fig. 51: Checking Continuity Between SH-AWD Control Unit Connector Terminal A5 And 
Hypoid Gear Speed Sensor Terminal No. 3 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Substitute a known-good SH-AWD control unit (see SH-AWD CONTROL UNIT 
REPLACEMENT ) and recheck. 

NO - Repair open in the wire between SH-AWD control unit connector A and the hypoid gear speed 
sensor connector. 

23. Check for continuity between SH-AWD control unit connector terminal A2 and hypoid gear speed 

sensor 3P connector terminal No. 2. 

 

2007 Acura RL 

2005-08 DRIVELINE/AXLES Rear Differential - RL

  

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Fig. 52: Checking Continuity Between SH-AWD Control Unit Connector Terminal A2 And 
Hypoid Gear Speed Sensor Terminal No. 2 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Go to step 24. 

NO - Repair open in the wire between SH-AWD control unit connector A and the hypoid gear speed 
sensor connector. 

24. Check for continuity between SH-AWD control unit connector terminal A2 and body ground. 

Fig. 53: Checking Continuity Between SH-AWD Control Unit Connector Terminal A2 And 
Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Repair short to body ground in the wire between SH-AWD control unit connector A and the 
hypoid gear speed sensor connector. 

NO - Replace the hypoid gear speed sensor (see HYPOID GEAR SPEED SENSOR 
REPLACEMENT ). 

DTC 27-2: HYPOID GEAR SPEED SENSOR MALFUNCTION 

NOTE:

Before you troubleshoot, review the general troubleshooting information 

 

2007 Acura RL 

2005-08 DRIVELINE/AXLES Rear Differential - RL

  

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1. Turn the ignition switch ON (II).  

2. Make sure the HDS communicates with the vehicle and the SH-AWD control unit. If it doesn't, 

troubleshoot the DLC circuit; '05-07 models (see '05-07 MODELS ), '08 model (see '08 MODEL ).  

3. Clear the DTC with the HDS.  

4. Turn the ignition switch OFF.  

5. Raise the vehicle, make sure it is securely supported, and allow the all four wheels to rotate freely.  

6. Start the engine.  

7. Shift to D position, and raise the vehicle speed to 19 mph (30 km/h).  

8. Check for DTCs with the HDS. 

Is DTC 27-2 indicated?  

YES - Go to step 9. 

NO - Intermittent failure, the system is OK at this time. 

9. Check for DTCs in the VSA system with the HDS. 

Are any VSA System DTCs indicated?  

YES - Go to the indicated DTCs troubleshooting. 

NO - Go to step 10. 

10. Raise the vehicle speed to 19 mph (30 km/h) again.  

11. Check a the hypoid gear speed sensor value with the HDS. 

Is a hypoid gear speed sensor value shown?  

YES - Substitute a known-good SH-AWD control unit (see SH-AWD CONTROL UNIT 
REPLACEMENT ) and recheck. 

NO - Go to step 12. 

12. Turn the ignition switch OFF.  

13. Disconnect the hypoid gear speed sensor 3P connector.  

14. Turn the ignition switch ON (II).  

15. Measure the voltage between hypoid gear speed sensor 3P connector terminals No. 1 and No. 3. 

(see GENERAL TROUBLESHOOTING INFORMATION ).

 

2007 Acura RL 

2005-08 DRIVELINE/AXLES Rear Differential - RL

  

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Friday, June 05, 2009 3:02:18 PM

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© 2005 Mitchell Repair Information Company, LLC. 

Fig. 54: Measuring Voltage Between Hypoid Gear Speed Sensor 3P Connector Terminals No. 1 
And No. 3 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there 4.0 V or more for at least 30 seconds?  

YES - Go to step 16. 

NO - Go to step 19. 

16. Turn the ignition switch OFF.  

17. Disconnect SH-AWD control unit connector A (26P).  

18. Check for continuity between SH-AWD control unit connector terminal A18 and hypoid gear speed 

sensor 3P connector terminal No. 1. 

Fig. 55: Checking Continuity Between SH-AWD Control Unit Connector Terminal A18 And 
Hypoid Gear Speed Sensor Terminal No. 1 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Replace the hypoid gear speed sensor (see HYPOID GEAR SPEED SENSOR 
REPLACEMENT ). 

NO - Repair open in the wire between SH-AWD control unit connector A and the hypoid gear speed 
sensor connector. 

19. Turn the ignition switch OFF.  

 

2007 Acura RL 

2005-08 DRIVELINE/AXLES Rear Differential - RL

  

me 

 

Friday, June 05, 2009 3:02:18 PM

Page 50 

© 2005 Mitchell Repair Information Company, LLC.