Acura RL. Manual - part 760

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

9. Turn the ignition switch OFF.  

10. Test the SH-AWD relay (see POWER RELAY TEST ). 

Is the SH-AWD relay OK?  

YES - Go to step 11. 

NO - Replace the SH-AWD relay (see SH-AWD RELAY REPLACEMENT ). 

11. Disconnect SH-AWD control unit connector B (8P).  

12. Check for continuity between SH-AWD relay 4P connector terminal No. 1 and SH-AWD control unit 

connector terminal B1. 

Fig. 73: Checking Continuity Between SH-AWD Relay 4P Connector Terminal No. 1 And SH-
AWD Control Unit Connector Terminal B1 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Go to step 13. 

NO - Repair open in the wire between SH-AWD control unit connector A and the SH-AWD relay. 

13. Check for continuity between SH-AWD relay 4P connector terminal No. 3 and SH-AWD control unit 

connector terminal A3. 

 

2007 Acura RL 

2005-08 DRIVELINE/AXLES Rear Differential - RL

  

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Fig. 74: Checking Continuity Between SH-AWD Relay 4P Connector Terminal No. 3 And SH-
AWD Control Unit Connector Terminal A3 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Go to step 14. 

NO - Repair open in the wire between SH-AWD control unit connector A and the SH-AWD relay. 

14. Check for continuity between SH-AWD relay 4P connector terminal No. 4 and body ground. 

Fig. 75: Checking Continuity Between SH-AWD Relay 4P Connector Terminal No. 4 And Body 
Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Go to step 15. 

NO - Repair open in the wire between the SH-AWD relay and body ground. 

15. Measure the voltage between SH-AWD relay 4P connector terminal No. 2 and body ground. 

 

2007 Acura RL 

2005-08 DRIVELINE/AXLES Rear Differential - RL

  

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Fig. 76: Measuring Voltage Between SH-AWD Relay 4P Connector Terminal No. 2 And Body 
Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there battery voltage?  

YES - Check for loose connector terminals at the SH-AWD control unit. If the connections are OK, 
substitute a known-good SH-AWD control unit (see SH-AWD CONTROL UNIT 
REPLACEMENT ) and recheck. 

NO - Repair open in the wire between the No. 1 fuse in the auxiliary under-hood fuse box and the SH-
AWD relay. 

DTC 44-32: SH-AWD CONTROL UNIT POWER SUPPLY STUCK ON 

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. Start the engine.  

5. Check for DTCs with the HDS. 

Is DTC 44-32 indicated?  

YES - Replace the SH-AWD control unit (see SH-AWD CONTROL UNIT REPLACEMENT ). 

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

DTC 44-41: SH-AWD CONTROL UNIT POWER SUPPLY STUCK OFF 

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, 

NOTE:

Before you troubleshoot, review the general troubleshooting information 
(see GENERAL TROUBLESHOOTING INFORMATION ).

NOTE:

Before you troubleshoot, review the general troubleshooting information 
(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. 

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

3. Clear the DTC with the HDS.  

4. Start the engine.  

5. Check for DTCs with the HDS. 

Is DTC 44-41 indicated?  

YES - Replace the SH-AWD control unit (see SH-AWD CONTROL UNIT REPLACEMENT ). 

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

DTC 44-50: SH-AWD CONTROL UNIT POWER SUPPLY VOLTAGE LOW 

1. Make sure the battery is fully changed and the charging system is working properly.  

2. Turn the ignition switch OFF.  

3. Check these fuse: 



No. 22 (70 A) fuse in the under-hood fuse/relay box.  



No. 1 (30 A) fuse in the passenger's under-dash fuse/relay box.  

Are the fuses OK?  

YES - Go to step 4. 

NO - Repair short to ground in the wire between the fuse and the SH-AWD relay, then replace the 
fuse and recheck. 

4. Turn the ignition switch ON (II).  

5. 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 ).  

6. Clear the DTC with the HDS.  

7. Start the engine.  

8. Check for DTCs with the HDS. 

Is DTC 44-50 indicated?  

YES - Go to step 9. 

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

9. Turn the ignition switch OFF.  

10. Test the SH-AWD relay (see POWER RELAY TEST ). 

Is the SH-AWD relay OK?  

NOTE:

Before you troubleshoot, review the general troubleshooting information 
(see GENERAL TROUBLESHOOTING INFORMATION ).

 

2007 Acura RL 

2005-08 DRIVELINE/AXLES Rear Differential - RL

  

me 

 

Friday, June 05, 2009 3:02:18 PM

Page 70 

© 2005 Mitchell Repair Information Company, LLC.