Catalytic Converter System Acura RL II рестайлинг

Scheme 64

DTC P0420: Rear Bank Catalyst System Efficiency Below Threshold (Bank 1): DTC P0430: Front Bank Catalyst System Efficiency Below Threshold (Bank 2)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). If some of the DTCs listed below are stored at the same time as DTC P0420 and/or P0430*, troubleshoot those DTCs first, then recheck for DTC P0420 and/or P0430*. P0137, P0138, P0157, P0158, P2270, P2271, P2272*, P2273*: Secondary HO2S (Sensor 2) P0141, P0161*: Secondary HO2S (Sensor 2) heater Poor quality fuel can cause these DTCs. Information marked with an asterisk (*) applies to the front bank (Bank 2).

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.
4. Test-drive under these conditions: Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C) Transmission in D Vehicle speed between 45 mph (72 km/h) and 75 mph (120 km/h) for 5 minutes or more with cruise control set Vehicle speed between 55 mph (88 km/h) and 75 mph (120 km/h) for 10 seconds, Then decelerate (with throttle fully closed). Repeat this 3 times or more. Maintain the vehicle speed at 55 mph (88 km/h) for 5 minutes or more with cruise control set
5. Monitor the OBD STATUS for DTC P0420 and/or P0430* in the DTCs MENU with the HDS. Does the screen indicate EXECUTING? YES -Go to step 6. NO -If the screen indicates OUT OF CONDITION, go to step 4 and recheck. If the screen indicates PASSED, intermittent failure, the system is OK at this time. If the screen indicates FAILED, go to step 8 and recheck.
6. Continue test driving until a result comes on.
7. Monitor the OBD STATUS for DTC P0420 and/or P0430* in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 8. NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 4 and recheck.
8. Turn the ignition switch to LOCK (0).
9. Replace the WU-TWC: For DTC P0420, replace the rear WU-TWC (Bank 1) (see «REAR»(/acura/rl/ii-2008-2012/remont/auxiliary-emission-control-systems/#catalytic-converter-system) ). For DTC P0430, replace the front WU-TWC (Bank 2) (see «WARM UP TWC REMOVAL/INSTALLATION»(/acura/rl/ii-2008-2012/remont/auxiliary-emission-control-systems/#catalytic-converter-system) ).
10. Turn the ignition switch to ON (II).
11. Reset the PCM with the HDS.
12. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rl/ii-2008-2012/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) ).
13. Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.
14. Test-drive for about 10 minutes, continually changing the vehicle speed.
15. Check the CATA MONITOR CONDITION B1 (B2)* in the DATA LIST with the HDS. Is the condition OK? YES -Go to step 16. NO -Go to step 13 , and recheck.
16. Test-drive under these conditions: Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C) Transmission in D Vehicle speed between 55 mph (88 km/h) and 75 mph (120 km/h) for 10 seconds, then decelerate (with throttle fully closed). Repeat this 3 times or more. Vehicle speed at 55 mph (88 km/h) for 5 minutes or more with cruise control set
17. Continue test-driving until a result comes on.
18. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0420 and/or P0430* indicated? YES -Check the fuel quality, then go to step 1 . NO -Go to step 19.
19. Monitor the OBD STATUS for DTC P0420 and/or P0430* 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 19, go to the indicated DTCs troubleshooting. NO -If the screen indicates FAILED, check the fuel quality, 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 16 .

Scheme 65

1. Remove the engine cover (see «REMOVAL»(/acura/rl/ii-2008-2012/remont/mechanical/#intake-manifold-and-exhaust-system) ).
2. Remove the condenser fan shroud (see «FAN, FAN MOTOR, AND SHROUD REMOVAL AND INSTALLATION»(/acura/rl/ii-2008-2012/remont/cooling-system-mechanical/#cooling-system) ).
3. Remove the No. 2 ignition coil and the ignition coil heat insulator.
4. Remove the front A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rl/ii-2008-2012/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ) and the front secondary HO2S (Sensor 2) (see «SECONDARY HO2S REPLACEMENT»(/acura/rl/ii-2008-2012/remont/testing-diagnostics/#pgm-fi-system__secondary-ho2s-replacement) ).
5. Remove the exhaust pipe A mounting nuts (front WU-TWC side) (see «EXHAUST PIPE AND MUFFLER REPLACEMENT»(/acura/rl/ii-2008-2012/remont/mechanical/#intake-manifold-and-exhaust-system__exhaust-pipe-and-muffler-replacement) ).
6. Remove the EGR pipe (see «EGR PIPE REMOVAL AND INSTALLATION»(/acura/rl/ii-2008-2012/remont/auxiliary-emission-control-systems/#egr-system) ).
7. Carefully remove the front WU-TWC.
8. Carefully install the front WU-TWC with a new gasket and new self-locking nuts. Tighten the nuts in a crisscross pattern in two or three steps.
9. Install the remaining parts in the reverse order of removal.

Scheme 66

1. Lift the vehicle, and support it with jackstands.
2. Remove the intermediate shaft (see «INTERMEDIATE SHAFT REMOVAL»(/acura/rl/ii-2008-2012/remont/axle-shafts/#drivelineaxle) ).
3. Remove the rear A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rl/ii-2008-2012/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ) and the rear secondary HO2S (Sensor 2) (see «SECONDARY HO2S REPLACEMENT»(/acura/rl/ii-2008-2012/remont/testing-diagnostics/#pgm-fi-system__secondary-ho2s-replacement) ).
4. Remove the exhaust pipe A mounting nuts (rear WU-TWC side) (see «EXHAUST PIPE AND MUFFLER REPLACEMENT»(/acura/rl/ii-2008-2012/remont/mechanical/#intake-manifold-and-exhaust-system__exhaust-pipe-and-muffler-replacement) ).
5. Carefully remove the rear WU-TWC.
6. Carefully install the rear WU-TWC with a new gasket and new self-locking nuts. Tighten the nuts in a crisscross pattern in two or three steps.
7. Install the parts in the reverse order of removal.

See also:
• GENERAL TROUBLESHOOTING INFORMATION
• PCM IDLE LEARN PROCEDURE
• REMOVAL
• FAN, FAN MOTOR, AND SHROUD REMOVAL AND INSTALLATION
• A/F SENSOR REPLACEMENT
• SECONDARY HO2S REPLACEMENT
• EXHAUST PIPE AND MUFFLER REPLACEMENT
• EGR PIPE REMOVAL AND INSTALLATION
• INTERMEDIATE SHAFT REMOVAL
• REAR