Acura RL. Manual - part 702

13. Turn the ignition switch OFF.  

14. Check for continuity between adaptive cruise control (ACC) unit 20P connector terminal No. 9, No. 

11, No. 12, and body ground individually. 

Fig. 121: Checking Continuity Between Adaptive Cruise Control (ACC) Unit 20P Connector 
Terminal 9, 11, 12, And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Substitute a known-good adaptive cruise control (ACC) unit, then go to step 15 and recheck. If 
DTC U0104 is not indicated, replace the original adaptive cruise control (ACC) unit, then go to step 
15. 

NO - Repair open in the wire between the adaptive cruise control (ACC) unit and G501, then go to 
step 15. 

15. Reconnect the adaptive cruise control (ACC) unit 20P connector.  

16. Turn the ignition switch ON (II).  

17. Reset the PCM with the HDS.  

18. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).  

19. Check for Temporary DTCs or DTCs with the HDS. 

Is DTC U0104 indicated?  

YES - Check for poor connections or loose terminals at the gauge control module, the adaptive cruise 
control (ACC) unit, and the PCM, then go to step 1. 

NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the 
indicated DTCs troubleshooting 

DTC U0114: F-CAN MALFUNCTION (SH-AWD CONTROL UNIT-PCM) 

NOTE:



Before you troubleshoot, record all freeze data and any on-board 
snapshot, and review the general troubleshooting information (see 
GENERAL TROUBLESHOOTING INFORMATION ).  



If DTC U0073 is stored at the same time as DTC U0114, troubleshoot 
DTC U0073 first, then recheck for DTC U0114.  

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

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1. Turn the ignition switch ON (II).  

2. Clear the DTC with the HDS.  

3. Check for Temporary DTCs or DTCs with the HDS. 

Is DTC U0114 indicated?  

YES - Go to step 4. 

NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals 
at the gauge control module, the SH-AWD control unit, and the PCM 

4. Check for Temporary DTCs or DTCs with the HDS. 

Is SH-AWD system DTC 41 and/or 77 indicated?  

YES - Go to step 5. 

NO - Go to step 8. 

5. Turn the ignition switch OFF.  

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

7. Check for continuity between SH-AWD control unit connector terminals A10 and A11. 

Fig. 122: Checking Continuity Between SH-AWD Control Unit Connector Terminals A10 And 
A11 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Substitute a known-good SH-AWD control unit, then go to step 16 and recheck. If DTC U0114 
is not indicated, replace the original SH-AWD control unit, then go to step 16. 

NO - Repair open in the wire between the SH-AWD control unit (A12 (A10)* and the PCM (E15 
(E26)*), then go to step 16. 

*:CANL line 

8. Check for a poor connection at SH-AWD control unit connectors A (26P) and B (8P). 

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

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Friday, June 05, 2009 2:35:00 PM

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Is the connection OK? 

YES - Go to step 9. 

NO - Repair the poor connection at SH-AWD control unit connectors A (26P) and B (8P), then go to 
step 16. 

9. Turn the ignition switch OFF.  

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

11. Turn the ignition switch ON (II).  

12. Measure voltage between SH-AWD control unit connector terminal A13 and body ground. 

Fig. 123: Measuring Voltage Between SH-AWD Control Unit Connector Terminal A13 And 
Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there battery voltage?  

YES - Go to step 13. 

NO - Check the SH-AWD system, then go to step 16. 

13. Turn the ignition switch OFF.  

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

15. Check for continuity between body ground and SH-AWD control unit connector terminals B2 and B3 

individually, and between SH-AWD control unit connector terminal A12 and body ground. 

Fig. 124: Checking Continuity Between Body Ground And SH-AWD Control Unit Connector 
Terminals B2 And B3

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

me 

 

Friday, June 05, 2009 2:35:00 PM

Page 152  © 2005 Mitchell Repair Information Company, LLC. 

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig. 125: Checking Continuity Between Body Ground And SH-AWD Control Unit Connector 
Terminals B2 And B3 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Substitute a known-good SH-AWD control unit, then go to step 16 and recheck. If DTC U0114 
is not indicated, replace the original SH-AWD control unit, then go to step 16. 

NO - Repair open in the wire between the SH-AWD control unit and G652, then go to step 16. 

16. Reconnect all connectors.  

17. Turn the ignition switch ON (II).  

18. Reset the PCM with the HDS.  

19. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).  

20. Check for Temporary DTCs or DTCs with the HDS. 

Is DTC U0114 indicated?  

YES - Check for poor connections or loose terminals at the gauge control module, the SH-AWD 
control unit, and the PCM, then go to step 1. 

NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the 
indicated DTCs troubleshooting 

DTC U0122: F-CAN MALFUNCTION (VSA MODULATOR-CONTROL UNIT-PCM) 

1. Turn the ignition switch ON (II).  

2. Clear the DTC with the HDS.  

3. Check for Temporary DTCs or DTCs with the HDS. 

NOTE:



Before you troubleshoot, record all freeze data and any on-board 
snapshot, and review the general troubleshooting information (see 
GENERAL TROUBLESHOOTING INFORMATION ).  



If DTC U0073 is stored at the same time as DTC U0122, troubleshoot 
DTC U0073 first, then recheck for DTC U0122.  

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

me 

 

Friday, June 05, 2009 2:35:00 PM

Page 153  © 2005 Mitchell Repair Information Company, LLC.