Acura RL. Manual - part 675

Fig. 38: Checking Continuity Between Body Ground And Secondary HO2S (Sensor 2) 4P 
Connector Terminals 3 And 4 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Go to step 21. 

NO - Go to step 10. 

10. Jump the SCS line with the HDS.  

11. Disconnect PCM connector A (31P).  

12. Check for continuity between PCM connector terminal A9 (A8) * and body ground. 

Fig. 39: Checking Continuity Between PCM Connector Terminal A9 (A8) And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Repair short in the wire between the PCM (E9 (E8)*) and the secondary HO2S (Sensor 2), then 
go to step 22. 

NO - Go to step 13. 

13. Connect secondary HO2S (Sensor 2) 4P connector terminal No. 3 to body ground with a jumper wire. 

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

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Fig. 40: Connecting Secondary HO2S (Sensor 2) 4P Connector Terminal No. 3 To Body Ground 
With Jumper Wire 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

14. Check for continuity between PCM connector terminal A9 (A8)* and body ground. 

Fig. 41: Checking Continuity Between PCM Connector Terminal A9 (A8) And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Go to step 15. 

NO - Repair open in the wire between the PCM (A9 (A8)*) and the secondary HO2S (Sensor 2), then 
go to step 22. 

15. Remove the left kick panel (see step 3 under TRIM REMOVAL/INSTALLATION - DOOR 

AREAS ), then remove the A/F sensor relay (LAF) (A) from the under-dash fuse/relay box. 

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

me 

 

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© 2005 Mitchell Repair Information Company, LLC. 

Fig. 42: Identifying A/F Sensor Relay (LAF) 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

16. Connect secondary HO2S (Sensor 2) 4P connector terminal No. 4 to body ground with a jumper wire. 

Fig. 43: Connecting Secondary HO2S (Sensor 2) 4P Connector Terminal No. 4 To Body Ground 
With Jumper Wire 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

17. Check for continuity between A/F sensor relay (LAF) 4P connector terminal No. 2 and body ground. 

Fig. 44: Checking Continuity Between A/F Sensor Relay (LAF) 4P Connector Terminal No. 2 
And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC.

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

me 

 

Friday, June 05, 2009 2:34:58 PM

Page 44 

© 2005 Mitchell Repair Information Company, LLC. 

Is there continuity?  

YES - Go to step 18. 

NO - Repair open in the wire between the A/F sensor (Sensor 1) and the A/F sensor relay (LAF), then 
go to step 22. 

18. Disconnect PCM connector E (31P).  

19. Check for continuity between PCM connector terminal E4 and A/F sensor relay (LAF) 4P connector 

terminal No. 4. 

Fig. 45: Checking Continuity Between PCM Connector Terminal E4 And A/F Sensor Relay 
(LAF) 4P Connector Terminal No. 4 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Go to step 20. 

NO - Repair open in the wire between the PCM (E4) and the A/F sensor relay (LAF), then go to step 
22. 

20. Test the A/F sensor relay (LAF) (see POWER RELAY TEST ). 

Is the A/F sensor relay (LAF) OK?  

YES - Go to step 28. 

NO - Replace the A/F sensor relay (LAF), then go to step 22. 

21. Replace the secondary HO2S (Sensor 2) (see SECONDARY HO2S REPLACEMENT ).  

22. Reconnect all connectors.  

23. Turn the ignition switch ON (II).  

24. Reset the PCM with the HDS.  

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

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

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

me 

 

Friday, June 05, 2009 2:34:58 PM

Page 45 

© 2005 Mitchell Repair Information Company, LLC.