Acura RL. Manual - part 768

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. Do the clutch function test with the HDS.  

5. Check for DTCs with the HDS. 

Is DTC 57-4 indicated?  

YES - Go to step 6. 

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

6. Turn the ignition switch OFF.  

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

8. Check for continuity between SH-AWD control unit connector terminals B6 and B7. 

Fig. 128: Checking Continuity Between SH-AWD Control Unit Connector Terminals B6 And 
B7 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Go to step 9. 

NO - Go to step 10. 

9. Check for continuity between SH-AWD control unit connector terminals B2 and B6, and between 

terminals B2 arid B7. 

 

2007 Acura RL 

2005-08 DRIVELINE/AXLES Rear Differential - RL

  

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Page 99 

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Fig. 129: Checking Continuity Between SH-AWD Control Unit Connector Terminals B2 And 
B6, And Between Terminals B2 Arid B7 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Repair short to ground in the wire between the SH-AWD control unit and the right clutch 
electromagnetic coil. 

NO - Go to step 11. 

10. Connect a jumper wire between SH-AWD control unit connector terminals B6 and B7. Disconnect the 

right clutch electromagnetic coil 2P connector, then check for continuity between right clutch 
electromagnetic coil 2P connector terminals No. 1 and No. 2. 

Fig. 130: Connecting Jumper Wire Between SH-AWD Control Unit Connector Terminals B6 
And B7 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

 

2007 Acura RL 

2005-08 DRIVELINE/AXLES Rear Differential - RL

  

me 

 

Friday, June 05, 2009 3:02:18 PM

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Fig. 131: Checking Continuity Between Right Clutch Electromagnetic 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 the SH-AWD control unit and the right clutch electromagnetic 
coil. 

11. Measure the resistance between right clutch electromagnetic coil 2P connector terminals No. 1 and 

No. 2. 

Fig. 132: Measuring Resistance Between Right Clutch Electromagnetic Coil 2P Connector 
Terminals No. 1 And No. 2 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there 0.6 ohms or less?  

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

NO - Replace the SH-AWD control unit (see SH-AWD CONTROL UNIT REPLACEMENT ). 

DTC 59-1: SH-AWD CONTROL UNIT POWER SUPPLY MONITOR CIRCUIT 

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 59-1 indicated?

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 101  © 2005 Mitchell Repair Information Company, LLC. 

YES - Go to step 6. 

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

6. Measure the voltage between SH-AWD control unit connector terminals B1 and B2. 

Fig. 133: Measuring Voltage Between SH-AWD Control Unit Connector Terminals B1 And B2
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there 18 V or more?  

YES - Check the charging system (see CHARGING SYSTEM INDICATOR CIRCUIT 
TROUBLESHOOTING ). 

NO - Replace the SH-AWD control unit (see SH-AWD CONTROL UNIT REPLACEMENT ). 

DTC 61-1: SHIFT SOLENOID VALVE (OPEN) 

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. Do the shift solenoid valve function test with the HDS.  

5. Check for DTCs with the HDS. 

Is DTC 61-1 indicated?  

YES - Go to step 6. 

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

6. Turn the ignition switch OFF.  

7. Disconnect SH-AWD control unit connectors A (26P) and B (8P).  

8. Check for continuity between SH-AWD control unit connector terminals A1 and B8. 

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 102  © 2005 Mitchell Repair Information Company, LLC.