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Acura RL. Manual - part 677

and/or CYL6 MISFIRE in the DATA LIST for 10 minutes with the HDS.

Does CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, CYL4 MISFIRE, CYL5 MISFIRE, and/or
CYL6 MISFIRE show misfire counts?

YES - Go to step 8.

NO - Intermittent failure, the system is OK at this time

8. Turn the ignition switch OFF.

9. Check the fuel quality.

Is the quality good?

YES - Go to step 10.

NO - Drain the fuel tank (see FUEL TANK DRAINING ), and fill it with a known-good fuel, then
go to step 19.

10. Inspect the spark plugs (see SPARK PLUG INSPECTION ). If the spark plugs are fouled or worn,

replace them.

11. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters:



ENGINE SPEED



VSS



TP SENSOR A



CLV (calculated load value)



ECT SENSOR 1

12. Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, CYL4 MISFIRE, CYL5 MISFIRE,

and/or CYL6 MISFIRE in the DATA LIST for 10 minutes with the HDS.

Does CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, CYL4 MISFIRE, CYL5 MISFIRE, and/or
CYL6 MISFIRE show misfire counts?

YES - Go to step 13.

NO - Go to step 19.

13. Check the fuel pressure (see FUEL PRESSURE TEST ).

Is the fuel pressure OK?

YES - Go to step 14.

NO -



If the pressure is too high, replace the fuel pressure regulator (see FUEL PRESSURE
REGULATOR REPLACEMENT ), then go to step 19.



If the pressure is too low, check the fuel pump, the fuel feed pipe, and the fuel filter. If they are
OK, replace the fuel pressure regulator (see FUEL PRESSURE REGULATOR

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

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REPLACEMENT ), then go to step 19.

14. Turn the ignition switch OFF.

15. Remove the rocker arm oil pressure switch (VTEC oil pressure switch) (A), and install the special

tools as shown, then attach the rocker arm oil pressure switch (VTEC oil pressure switch) to the
pressure gauge adapter (B).

Fig. 46: Identifying Rocker Arm Oil Pressure Switch And Pressure Gauge Adapter With
Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.

16. Reconnect the rocker arm oil pressure switch (VTEC oil pressure switch) 2P connector.

17. Start the engine. Hold the engine speed at 3000 RPM without load (in Park or neutral) until the

radiator fan comes on.

18. Check the oil pressure at engine speeds of 1000 and 2000 RPM. Keep the measuring time as short as

possible (less than 1 minute) because the engine is running without load.

Is the oil pressure below 49 kPa (0.5 kgf/cm

, 7 psi)?

YES - Check for air in the fuel line, then go to step 19.

NO - Inspect the VTEC system (see VTEC ROCKER ARM TEST ), then go to step 19.

19. Turn the ignition switch ON (II).

20. Reset the PCM with the HDS.

21. Clear the CKP pattern with the HDS.

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

23. Do the CKP pattern learn procedure (see CRANK (CKP) PATTERN CLEAR/CRANK (CKP)

PATTERN LEARN ).

24. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters:



ENGINE SPEED

NOTE:

Install the parts in the reverse order of removal with a new O-ring.

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

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

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

VSS



TP SENSOR A



CLV (calculated load value)



ECT SENSOR 1

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

Is DTC P0300 and any combination of DTC P0301, P0302, P0303, P0304, P0305, or P0306
indicated?

YES - Check for poor connections or loose terminals at the ignition coil, the injector, and the PCM,
then go to step 1.

NO - Go to step 26.

26. Monitor the OBD STATUS for DTC P0301, P0302, P0303, P0304, P0305, or P0306 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 25,
go to the indicated DTCs troubleshooting

NO - If the screen indicates FAILED, check for poor connection or loose terminals at the ignitions
coil, the injector, 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 24.

DTC P0301: NO. 1 CYLINDER MISFIRE DETECTED; DTC P0302: NO. 2 CYLINDER MISFIRE
DETECTED; DTC P0303: NO. 3 CYLINDER MISFIRE DETECTED; DTC P0304: NO. 4
CYLINDER MISFIRE DETECTED; DTC P0305: NO. 5 CYLINDER MISFIRE DETECTED; DTC
P0306: NO. 6 CYLINDER MISFIRE DETECTED

1. Turn the ignition switch ON (II).

2. Do the DTC CLEAR in the CLEAR MENU with the HDS.

3. Start the engine (in Park or neutral), then let it idle without load.

4. Monitor the OBD STATUS for DTC P0301, P0302, P0303, P0304, P0305, or P0306 in the DTCs

MENU with the HDS.

Does the screen indicate FAILED?

YES - Go to step 9.

NO - If the screen indicates PASSED, go to step 5. If the screen indicates EXECUTING, keep driving
until a result comes on. If the screen indicates OUT OF CONDITION, wait for several minutes, and
recheck.

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 2:34:58 PM

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5. Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, CYL4 MISFIRE, CYL5 MISFIRE,

and/or CYL6 MISFIRE in the DATA LIST for 10 minutes with the HDS.

Does CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, CYL4 MISFIRE, CYL5 MISFIRE, and/or
CYL6 MISFIRE show misfire counts?

YES - Go to step 9.

NO - Go to step 6.

6. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters:



ENGINE SPEED



VSS



TP SENSOR A



CLV (calculated load value)



ECT SENSOR 1

7. Monitor the OBD STATUS for DTC P0301, P0302, P0303, P0304, P0305, or P0306 in the DTCs

MENU with the HDS.

Does the screen indicate FAILED?

YES - Go to step 9.

NO - If the screen indicates PASSED, go to step 9. If the screen indicates EXECUTING, keep driving
until a result comes on. If the screen indicates OUT OF CONDITION, go to step 8 and recheck.

8. Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, CYL4 MISFIRE, CYL5 MISFIRE,

and/or CYL6 MISFIRE in the DATA LIST for 10 minutes with the HDS.

Does CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, CYL4 MISFIRE, CYL5 MISFIRE, and/or
CYL6 MISFIRE show misfire counts?

YES - Go to step 9.

NO - Intermittent failure, the system is OK at this time. Check the fuel and ignition system circuit
connectors for loose wires or poor connections

9. Turn the ignition switch OFF.

10. Exchange the ignition coil from the problem cylinder with one from another cylinder.

11. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters:



ENGINE SPEED



VSS



TP SENSOR A



CLV (calculated load value)



ECT SENSOR 1

12. Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, CYL4 MISFIRE, CYL5 MISFIRE,

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

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

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Content .. 675 676 677 678 ..