Acura RL. Manual - part 703

Is DTC U0122 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 VSA modulator-control unit, and the PCM 

4. Check for DTCs in the DTCs MENU with the HDS. 

Is VSA system DTC 86 indicated?  

YES - Go to step 5. 

NO - Go to step 8. 

5. Turn the ignition switch OFF.  

6. Disconnect the VSA modulator-control unit 47P connector.  

7. Check for continuity between VSA modulator-control unit 47P connector terminals No. 14 and No. 

30. 

Fig. 126: Checking Continuity Between VSA Modulator-Control Unit 47P Connector Terminals 
No. 14 And No. 30 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Substitute a known-good VSA modulator-control unit, then go to step 15 and recheck. If DTC 
U0122 is not indicated, replace the original VSA modulator-control unit, then go to step 15. 

NO - Repair open in the wire between the VSA modulator-control unit (No. 14 (No. 30)) and the 
PCM (E15 (E26)), then go to step 15. 

8. Check for a poor connection at the VSA modulator-control unit 47P connector. 

Are the connection OK?  

YES - Go to step 9. 

NO - Repair the connection(s), then go to step 16.

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

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9. Turn the ignition switch OFF.  

10. If not already done, disconnect the VSA modulator-control unit 47P connector.  

11. Turn the ignition switch ON (II).  

12. Measure voltage between VSA modulator-control unit 47P connector terminal No. 38 and body 

ground. 

Fig. 127: Measuring Voltage Between VSA Modulator-Control Unit 47P Connector Terminal 
No. 38 And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there battery voltage?  

YES - Go to step 13. 

NO - Check the No. 18 (15A) fuse in the driver's under-dash fuse/relay box. If the fuse is OK, repair 
open in the wire between the No. 18 (15A) fuse and the VSA modulator-control unit, then go to step 
15. 

13. Turn the ignition switch OFF.  

14. Check for continuity between VSA modulator-control unit 47P connector terminal No. 32 and body 

ground. 

Fig. 128: Checking Continuity Between VSA Modulator-Control Unit 47P Connector Terminal 
No. 32 And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

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YES - Substitute a known-good VSA modulator-control unit, then go to step 15 and recheck. If DTC 
U0122 is not indicated, replace the original VSA modulator-control unit, then go to step 15. 

NO - Repair open in the wire between the VSA modulator-control unit and G203, then go to step 15. 

15. Reconnect the VSA modulator-control unit 47P 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 U0122 indicated?  

YES - Check for poor connections or loose terminals at the gauge control module, the VSA 
modulator-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 

F-CAN CIRCUIT TROUBLESHOOTING 

'08 MODEL 

1. Turn the ignition switch OFF.  

2. Jump the SCS line with the HDS.  

3. Disconnect PCM connector E (31P), then disconnect the HDS.  

4. Measure resistance between PCM connector terminals E15 and E26*. 

Fig. 129: Measuring Resistance Between PCM Connector Terminals E15 And E26 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there about 85-103 0, ?  

YES - Go to step 40. 

NOTE:

Information marked with an asterisk (*) applies to the CANL line.

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

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NO - Go to step 5. 

5. Disconnect gauge control module connector B (28P) (see GAUGE CONTROL MODULE 

REPLACEMENT ).  

6. Disconnect the VSA modulator-control unit 47P connector (see VSA MODULATOR-CONTROL 

UNIT REMOVAL AND INSTALLATION ).  

7. Disconnect SH-AWD control unit connector A (26P) (see SH-AWD CONTROL UNIT 

REPLACEMENT ).  

8. Disconnect the ACC unit 20P connector (see ADAPTIVE CRUISE CONTROL (ACC) UNIT 

REMOVAL/INSTALLATION ).  

9. Disconnect e-pretensioner unit connector B (14P) (see E-PRETENSIONER UNIT 

REPLACEMENT ).  

10. Disconnect TPMS unit connector B(20P) (see TPMS INDICATOR OR TIRE(S) INDICATOR(S) 

DOES NOT GO OFF, AND NO DTCS ARE STORED ).  

11. Check for continuity between PCM connector terminals E15 and E26*. 

Fig. 130: Checking Continuity Between PCM Connector Terminals E15 And E26 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Repair short in the wires between PCM connector terminals E15 and E26* 

NO - Go to step 12. 

12. Connect PCM connector terminal E15 to body ground with a jumper wire. 

Fig. 131: Connecting PCM Connector Terminal E15 To Body Ground With Jumper Wire

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

me 

 

Friday, June 05, 2009 2:35:00 PM

Page 157  © 2005 Mitchell Repair Information Company, LLC.