Acura RL. Manual - part 758

Fig. 64: Checking Continuity Between SH-AWD Control Unit Connector Terminal A10 And 
Gauge Assembly Connector Terminal B15 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Check for loose connector terminals at the SH-AWD control unit, the gauge assembly, and 
G602. If all connections are OK, replace the SH-AWD control unit (see SH-AWD CONTROL 
UNIT REPLACEMENT ). 

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

DTC 42-1: DIFFERENTIAL OIL TEMPERATURE SENSOR (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. Turn the ignition switch OFF.  

5. Turn the ignition switch ON (II).  

6. Check for DTCs with the HDS. 

Is DTC 42-1 indicated?  

YES - Go to step 7. 

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

7. Turn the ignition switch OFF.  

8. Disconnect the rear differential oil temperature sensor 2P connector and SH-AWD connector A (26P). 

9. Check for continuity between rear differential oil temperature sensor 2P connector terminals No. 1 

and No. 2. 

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 59 

© 2005 Mitchell Repair Information Company, LLC. 

Fig. 65: Checking Continuity Between Rear Differential Oil Temperature Sensor 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 rear differential oil temperature sensor 2P connector terminals 
No. 1 and No. 2. 

NO - Go to step 10. 

10. Connect the rear differential oil temperature sensor 2P connector.  

11. Measure the resistance between SH-AWD control unit connector terminals A9 and A23. 

Fig. 66: Measuring Resistance Between SH-AWD Control Unit Connector Terminals A9 And 
A23 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there 520 ohms to 3.5 kohms, with the rear differential fluid at normal temperature?  

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

NO - Replace the rear differential oil temperature sensor (see REAR DIFFERENTIAL FLUID 
TEMPERATURE SENSOR REPLACEMENT ). 

DTC 42-2: DIFFERENTIAL OIL TEMPERATURE SENSOR (SHORT) 

NOTE:

Before you troubleshoot, review the general troubleshooting information 

 

2007 Acura RL 

2005-08 DRIVELINE/AXLES Rear Differential - RL

  

me 

 

Friday, June 05, 2009 3:02:18 PM

Page 60 

© 2005 Mitchell Repair Information Company, LLC. 

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 42-2 indicated?  

YES - Go to step 7. 

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

7. Turn the ignition switch OFF.  

8. Disconnect the rear differential oil temperature sensor 2P connector.  

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

10. Check for continuity between SH-AWD control unit connector terminal A9 and rear differential oil 

temperature sensor 2P connector terminal No. 2. 

Fig. 67: Checking Continuity Between Terminal A9 And Rear Differential Oil Temperature 
Sensor 2P Connector Terminal No. 2 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Go to step 11. 

NO - Repair open in the wire between SH-AWD control unit connector A and the rear differential oil 
temperature sensor connector. 

11. Check for continuity between SH-AWD control unit connector terminals A9 and A12. 

(see GENERAL TROUBLESHOOTING INFORMATION ).

 

2007 Acura RL 

2005-08 DRIVELINE/AXLES Rear Differential - RL

  

me 

 

Friday, June 05, 2009 3:02:18 PM

Page 61 

© 2005 Mitchell Repair Information Company, LLC. 

Fig. 68: Checking Continuity Between SH-AWD Control Unit Connector Terminals A9 And 
A12 
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 rear differential 
oil temperature sensor connector. 

NO - Go to step 12. 

12. Check for continuity between SH-AWD control unit connector terminals A12 and A23. 

Fig. 69: Checking Continuity Between SH-AWD Control Unit Connector Terminals A12 And 
A23 
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 rear differential 
oil temperature sensor connector. 

NO - Go to step 13. 

13. Reconnect the rear differential oil temperature sensor 2P connector.  

14. Measure the resistance between SH-AWD control unit connector terminals A9 and A23. 

 

2007 Acura RL 

2005-08 DRIVELINE/AXLES Rear Differential - RL

  

me 

 

Friday, June 05, 2009 3:02:18 PM

Page 62 

© 2005 Mitchell Repair Information Company, LLC.