Content .. 696 697 698 699 ..

Acura RL. Manual - part 698

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 0.2 V or less?

YES - Go to step 20.

NO - Go to step 13.

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

14. Reconnect all connectors.

15. Turn the ignition switch ON (II).

16. Reset the PCM with the HDS.

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

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

Is DTC P2252 and/or P2255* 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 - Go to step 19.

19. Monitor the OBD STATUS for DTC P2252 and/or P2255* in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 18,
go to the indicated DTCs troubleshooting

NO - If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor
(Sensor 1) and the PCM, then go to step 1. If the screen indicates NOT COMPLETED, keep idling
until a result comes on.

20. Turn the ignition switch OFF.

21. Reconnect all connectors.

22. 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 ).

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

Is DTC P2252 and/or P2255* 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 - Go to step 24.

24. Monitor the OBD STATUS for DTC P2252 and/or P2255* in the DTCs MENU with the HDS.

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:34:59 PM

Does the screen indicate PASSED?

YES - 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 were indicated
in step 23, go to the indicated DTCs troubleshooting

NO - If the screen indicates FAILED, 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. If the screen
indicates NOT COMPLETED, keep idling until a result comes on.

DTC P2270: REAR SECONDARY HO2S (BANK 1, SENSOR 2) CIRCUIT SIGNAL STUCK LEAN;
DTC P2271: REAR SECONDARY HO2S (BANK 1, SENSOR 2) CIRCUIT SIGNAL STUCK RICH;
DTC P2272: FRONT SECONDARY HO2S (BANK 2, SENSOR 2) CIRCUIT SIGNAL STUCK
LEAN; DTC P2273: FRONT SECONDARY HO2S (BANK 2, SENSOR 2) CIRCUIT SIGNAL
STUCK RICH

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.

4. Test-drive under these conditions:



Engine coolant temperature (ECT SENSOR 1) above 176°F (80°C)



Vehicle speed between 35-55 mph (56-88 km/h)



Drive 1 minute or more

5. Monitor the OBD STATUS for DTC P2270, P2271, P2272*, and/or P2273* in the DTCs MENU with

the HDS.

Does the screen indicate FAILED?

YES - Go to step 6.

NO - If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for
poor connections or loose terminals at the secondary HO2S (Sensor 2) and the PCM. If the screen
indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF
CONDITION, go to step 3 and recheck.

6. Turn the ignition switch OFF.

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

8. Turn the ignition switch ON (II).

9. Reset the PCM 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 ).



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

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:34:59 PM

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

11. 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.

12. Test-drive under these conditions:



Engine coolant temperature (ECT SENSOR 1) above 176°F (80°C)



Vehicle speed between 35-55 mph (56-88 km/h)



Drive 1 minute or more

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

Is DTC P2270, P2271, P2272*, and/or P2273* indicated?

YES - Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the PCM,
then go to step 1.

NO - Go to step 14.

14. Monitor the OBD STATUS for DTC P2270, P2271, P2272*, and/or P2273* in the DTCs MENU with

the HDS.

Does the screen indicate PASSED?

YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 13,
go to the indicated DTCs troubleshooting

NO - If the screen indicates FAILED, check for poor connections or loose terminals at the secondary
HO2S (Sensor 2) and the PCM, then go to step 1. If the screen indicates EXECUTING, keep driving
until a result comes on. If the screen indicates OUT OF CONDITION, go to step 11.

DTC P2610: PCM INTERNAL POWER OFF TIMER MALFUNCTION

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 P2610 indicated?

YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time. If any other Temporary DTCs or DTCs are
indicated, go to the indicated DTCs troubleshooting

4. 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 ).

NOTE:

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

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:34:59 PM

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

Is DTC P2610 indicated?

YES - 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 P2627: REAR A/F SENSOR (BANK 1, SENSOR 1) LABEL CIRCUIT LOW VOLTAGE; DTC
P2630: FRONT A/F SENSOR (BANK 2, SENSOR 1) LABEL CIRCUIT LOW 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 P2627 and/or P2630* 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 PCM connector D (17P).

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

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

Friday, June 05, 2009 2:34:59 PM

Content .. 696 697 698 699 ..