Acura RL. Manual - part 592

4. Make sure the IMT VALVE CMD is CLOSED in the DATA LIST with the HDS. 

Is CLOSE indicated?  

YES -Go to step 5. 

NO -Go to step 29. 

5. Check the IMT VALVE SW in the DATA LIST with the HDS. 

Is OPEN indicated?  

YES -Go to step 6. 

NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals 
at the IMT actuator and the PCM. 

6. Turn the ignition switch OFF.  

7. Disconnect the IMT actuator 5P connector.  

8. Turn the ignition switch ON (II).  

9. Check the IMT VALVE SW in the DATA LIST with the HDS. 

Is CLOSED indicated?  

YES -Go to step 14. 

NO -Go to step 10. 

10. Turn the ignition switch OFF.  

11. Jump the SCS line with the HDS.  

12. Disconnect PCM connector B (24P).  

13. Check for continuity between PCM connector terminal B11 and body ground. 

Fig. 2: Checking Continuity Between PCM Connector Terminal B11 And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE Intake Air System - RL

  

me 

 

Friday, June 05, 2009 2:36:38 PM

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© 2005 Mitchell Repair Information Company, LLC. 

YES -Repair short in the wire between the PCM (B11) and the IMT actuator, then go to step 25.

NO -Go to step 31. 

14. Turn the ignition switch OFF.  

15. Jump the SCS line with the HDS.  

16. Disconnect PCM connector B (24P).  

17. Check for continuity between PCM connector terminal B4 and body ground. 

Fig. 3: Checking Continuity Between PCM Connector Terminal B4 And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES -Repair short in the wire between the PCM (B4) and the IMT actuator, then go to step 25. 

NO -Go to step 18. 

18. Connect IMT actuator 5P connector terminal No. 5 to body ground with a jumper wire. 

Fig. 4: Connecting IMT Actuator 5P Connector Terminal No. 5 To Body Ground With Jumper 
Wire 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

19. Check for continuity between PCM connector terminal B4 and body ground. 

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE Intake Air System - RL

  

me 

 

Friday, June 05, 2009 2:36:38 PM

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© 2005 Mitchell Repair Information Company, LLC. 

Fig. 5: Checking Continuity Between PCM Connector Terminal B4 And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES -Go to step 20. 

NO -Repair open in the wire between the PCM (B4) and the IMT actuator, then go to step 25. 

20. Check for continuity between PCM connector terminal B3 and body ground. 

Fig. 6: Checking Continuity Between PCM Connector Terminal B3 And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES -Repair short in the wire between the PCM (B3) and the IMT actuator, then go to step 25. 

NO -Go to step 21. 

21. Connect IMT actuator 5P connector terminal No. 4 to body ground with a jumper wire. 

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE Intake Air System - RL

  

me 

 

Friday, June 05, 2009 2:36:38 PM

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© 2005 Mitchell Repair Information Company, LLC. 

Fig. 7: Connecting IMT Actuator 5P Connector Terminal No. 4 To Body Ground With Jumper 
Wire 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

22. Check for continuity between PCM connector terminal B3 and body ground. 

Fig. 8: Checking Continuity Between PCM Connector Terminal B3 And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES -Go to step 23. 

NO -Repair open in the wire between the PCM (B3) and the IMT actuator, then go to step 25. 

23. Remove the IMT actuator (see IMT ACTUATOR REPLACEMENT ).  

24. Move the IMT valve by hand. 

Does it move smoothly?  

YES -Substitute a known-good IMT actuator (see IMT ACTUATOR REPLACEMENT ), then go 
to step 25 and recheck. If DTC P1077 is not indicated, replace the IMT actuator (see IMT 
ACTUATOR REPLACEMENT ), then go to step 25. If DTC P1077 is indicated, go to step 33. 

NO -Remove the engine cover (see step 1 under INTAKE MANIFOLD REMOVAL AND 
INSTALLATION ), and repair the stuck valve. If necessary, replace the intake manifold (see 
INTAKE MANIFOLD REMOVAL AND INSTALLATION ), then go to step 25. 

25. Reconnect all connectors.  

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE Intake Air System - RL

  

me 

 

Friday, June 05, 2009 2:36:38 PM

Page 5 

© 2005 Mitchell Repair Information Company, LLC.