Acura RL. Manual - part 699

Fig. 110: Checking Continuity Between PCM Connector Terminal D11 (D10) And Body 
Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Go to step 9. 

NO - Go to step 17. 

9. Disconnect the A/F sensor (Sensor 1) 8P connector.  

10. Check for continuity between PCM connector terminal D11 (D10)* and body ground. 

Fig. 111: Checking Continuity Between PCM Connector Terminal D11 (D10) And Body 
Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Repair short in the wire between the PCM (D11 (D10)*) and the A/F sensor (Sensor 1), then go 
to step 12. 

NO - Go to step 11. 

11. Replace the A/F sensor (Sensor 1) (see A/F SENSOR REPLACEMENT ).  

12. Reconnect all connectors.  

13. Turn the ignition switch ON (II).  

14. Reset the PCM with the HDS.  

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

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

Is DTC P2627 and/or P2630* indicated?  

YES - Check for poor connections or loose terminals at the A/F sensor (Sensor 1) 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 

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

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17. Reconnect all connectors.  

18. Update the PCM if it does not have the latest software (see UPDATING THE PCM ), or substitute a 

known-good PCM (see SUBSTITUTING THE PCM ).  

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

Is DTC P2627 and/or P2630* indicated?  

YES - Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the PCM. If the 
PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. 
If the PCM was substituted, go to step 1. 

NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the 
original PCM (see PCM REPLACEMENT ). If any other Temporary DTCs or DTCs are indicated, 
go to the indicated DTCs troubleshooting 

DTC P2628: REAR A/F SENSOR (BANK 1, SENSOR 1) LABEL CIRCUIT HIGH VOLTAGE; DTC 
P2631: FRONT A/F SENSOR (BANK 2, SENSOR 1) LABEL CIRCUIT HIGH VOLTAGE 

1. Turn the ignition switch ON (II).  

2. Clear the DTC with the HDS.  

3. Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the 

radiator fan comes on, then let it idle 2 minutes.  

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

Is DTC P2628 and/or P2631* indicated?  

YES - Go to step 5. 

NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals 
at the A/F sensor (Sensor 1) and the PCM 

5. Turn the ignition switch OFF.  

6. Jump the SCS line with the HDS.  

7. Disconnect the A/F sensor (Sensor 1) 8P connector.  

8. Disconnect PCM connector D(17P).  

9. Connect A/F sensor (Sensor 1) 8P connector terminal No. 4 to body ground with a jumper wire. 

NOTE:



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



Information marked with an asterisk (*) applies to the front bank (Bank 
2).  

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

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Friday, June 05, 2009 2:34:59 PM

Page 139  © 2005 Mitchell Repair Information Company, LLC. 

Fig. 112: Connecting A/F Sensor (Sensor 1) 8P Connector Terminal No. 4 To Body Ground 
With Jumper Wire 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

10. Check for continuity between PCM connector terminal D11 (D10)* and body ground. 

Fig. 113: Checking Continuity Between PCM Connector Terminal D11 (D10) And Body 
Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Go to step 11. 

NO - Repair open in the wire between the PCM (D11 (D10)*) and the A/F sensor (Sensor 1), then go 
to step 19. 

11. Remove the jumper wire from the A/F sensor (Sensor 1) 8P connector.  

12. Disconnect PCM connector C (22P).  

13. Connect A/F sensor (Sensor 1) 8P connector terminal No. 3 to body ground with a jumper wire. 

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

me 

 

Friday, June 05, 2009 2:34:59 PM

Page 140  © 2005 Mitchell Repair Information Company, LLC. 

Fig. 114: Connecting A/F Sensor (Sensor 1) 8P 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 C12 and body ground. 

Fig. 115: Checking Continuity Between PCM Connector Terminal C12 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 (C12) and the A/F sensor (Sensor 1), then go to step 
19. 

15. Remove the jumper wire from the A/F sensor (Sensor 1) 8P connector, then reconnect PCM 

connectors C (22P) and D (17P).  

16. Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the 

radiator fan comes on, then let it idle 2 minutes.  

17. Measure voltage between PCM connector terminals D11 (D10)* and C12. 

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

me 

 

Friday, June 05, 2009 2:34:59 PM

Page 141  © 2005 Mitchell Repair Information Company, LLC.