Acura RL. Manual - part 772

YES - Go to step 6. 

NO - Go to step 8. 

6. Measure the resistance between SH-AWD control unit connector terminals A4 and A17. 

Fig. 147: Measuring Resistance Between SH-AWD Control Unit Connector Terminals A4 And 
A17 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there 2.0 ohms or more?  

YES - Go to step 7. 

NO - Go to step 9. 

7. Check for continuity between SH-AWD control unit connector terminal A4 and body ground. 

Fig. 148: Checking Continuity Between SH-AWD Control Unit Connector Terminal A4 And 
Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Repair short in the wire between SH-AWD control unit connector terminal A4 and body 
ground. 

NO - Check for loose connector terminals at the SH-AWD control unit and repair if necessary. If the 
connections are OK, substitute a known-good SH-AWD control unit (see SH-AWD CONTROL 

 

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2005-08 DRIVELINE/AXLES Rear Differential - RL

  

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UNIT REPLACEMENT ) and recheck.

8. Connect a jumper wire between SH-AWD control unit connector terminals A4 and A17. Disconnect 

the left search coil 2P connector, then check for continuity between left search coil 2P connector 
terminals No. 1 and No. 2. 

Fig. 149: Connecting Jumper Wire Between SH-AWD Control Unit Connector Terminals A4 
And A17 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Fig. 150: Checking Continuity Between Left Search Coil 2P Connector Terminals No. 1 And No. 
2 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Replace the rear differential side case (see SIDE CASE REPLACEMENT ). 

NO - Repair open in the wire between left search coil 2P connector terminals No. 1 and No. 2. 

9. Disconnect the left search coil 2P connector, then check for continuity between left search coil 2P 

connector terminals No. 1 and No. 2. 

 

2007 Acura RL 

2005-08 DRIVELINE/AXLES Rear Differential - RL

  

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Fig. 151: Checking Continuity Between Left Search Coil 2P Connector Terminals No. 1 And No. 
2 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Repair short in the wire between SH-AWD control unit connector A and the left search coil 
connector. 

NO - Replace the rear differential side case (see SIDE CASE REPLACEMENT ). 

DTC 81-3: LEFT CLUTCH ELECTROMAGNETIC COIL MAGNETIC FLUX 
CHARACTERISTIC 

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. Turn the ignition switch OFF.  

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

5. Measure the resistance between SH-AWD control unit connector terminals A4 and A17. 

Fig. 152: Measuring Resistance Between SH-AWD Control Unit Connector Terminals A4 And 
A17 
Courtesy of AMERICAN HONDA MOTOR CO., INC.

NOTE:

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

 

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2005-08 DRIVELINE/AXLES Rear Differential - RL

  

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Is there 2.0 ohms or less?  

YES - Replace the rear differential side case (see SIDE CASE REPLACEMENT ). 

NO - Go to step 6. 

6. Clear the DTC with the HDS.  

7. Do the SH-AWD differential clutch torque memorization (see SH-AWD DIFFERENTIAL 

CLUTCH TORQUE MEMORIZATION ).  

8. Test-drive the vehicle at a speed of more than 1 mph (2 km/h) for at least 1 second.  

9. Check for DTCs with the HDS. 

Is DTC 81-1, 81-2, 82-1, and/or 82-2 indicated?  

YES - Go to the indicated DTCs troubleshooting. 

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

DTC 82-1: RIGHT SEARCH COIL SENSOR MALFUNCTION 

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. Turn the ignition switch ON (II).  

6. Check for DTCs with the HDS. 

Is DTC 82-1 indicated?  

YES - Replace the rear differential side case (see SIDE CASE REPLACEMENT ). 

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

DTC 82-2: RIGHT SEARCH COIL SENSOR (OPEN OR SHORT) 

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. Turn the ignition switch OFF.  

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

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

  

me 

 

Friday, June 05, 2009 3:02:19 PM

Page 118  © 2005 Mitchell Repair Information Company, LLC.