Acura RL. Manual - part 673

Fig. 33: Checking Continuity Between Secondary HO2S (Sensor 2) 4P Connector Terminal No.
1 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Repair short in the wire between the PCM (B9 (B18)*) and the secondary HO2S (Sensor 2),
then go to step 15.

NO - Go to step 23.

13. Turn the ignition switch OFF.

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

15. Reconnect all connectors.

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. 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.

20. Test-drive under these conditions:



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



Transmission in D position



Engine speed at 1,500-3,000 RPM



Drive 1 minute or more

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

Is DTC P0137 and/or P0157* 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 22.

22. Monitor the OBD STATUS for DTC P0137 and/or P0157* in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:34:58 PM

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YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 21,
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 20.

23. 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 ).

24. 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.

25. Test-drive under these conditions:



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



Transmission in D position



Engine speed at 1,500-3,000 RPM



Drive 1 minute or more

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

Is DTC P0137 and/or P0157* indicated?

YES - Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the PCM.
If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then go
to step 24. If the PCM was substituted, go to step 1.

NO - Go to step 27.

27. Monitor the OBD STATUS for DTC P0137 and/or P0157* in the DTCs MENU with the HDS.

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 26, 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. If the PCM was updated, substitute a known-good PCM (see
SUBSTITUTING THE PCM ), then go to step 24. If the PCM was substituted, go to step 1. If the
screen indicates NOT COMPLETED, go to step 24.

DTC P0138: REAR SECONDARY HO2S (BANK 1, SENSOR 2) CIRCUIT HIGH VOLTAGE; DTC
P0158: FRONT SECONDARY HO2S (BANK 2, SENSOR 2) CIRCUIT HIGH VOLTAGE

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 2:34:58 PM

Page 35

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. Check the HO2S S2 in the DATA LIST with the HDS.

Does the voltage stay at 1.25 V or more?

YES - Go to step 5.

NO - 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

5. Turn the ignition switch OFF.

6. Disconnect the secondary HO2S (Sensor 2) 4P connector.

7. Connect secondary HO2S (Sensor 2) 4P connector terminals No. 1 and No. 2 with a jumper wire.

Fig. 34: Connecting Secondary HO2S (Sensor 2) 4P Connector Terminals No. 1 And 2 With
Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.

8. Turn the ignition switch ON (II).

9. Check the HO2S S2 in the DATA LIST with the HDS.

Does the voltage stay at 1.25 V or more?

YES - Go to step 10.

NO - Go to step 19.

10. Turn the ignition switch OFF.

11. Remove the jumper wire from the secondary HO2S (Sensor 2) 4P connector.

12. Connect secondary HO2S (Sensor 2) 4P connector terminal No. 1 to body ground with a jumper wire.

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:34:58 PM

Page 36

Fig. 35: Connecting Secondary HO2S (Sensor 2) 4P Connector Terminal No. 1 To Body Ground
With Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.

13. Turn the ignition switch ON (II).

14. Check the HO2S S2 in the DATA LIST with the HDS.

Does the voltage stay at 1.25 V or more?

YES - Go to step 15.

NO - Repair open in the wire between the PCM (C12) and the secondary HO2S (Sensor 2), then go to
step 21.

15. Turn the ignition switch OFF.

16. Jump the SCS line with the HDS.

17. Disconnect PCM connector B (24P).

18. Check for continuity between PCM connector terminal B9 (B18)* and body ground.

Fig. 36: Checking Continuity Between PCM Connector Terminal B9 (B18) And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 29.

NO - Repair open in the wire between the PCM (B9 (B18)*) and the secondary HO2S (Sensor 2),
then go to step 21.

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:34:58 PM

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