Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). If DTC P0107, P0108, P1128, and/or P1129 are stored at the same time as DTC P2227, troubleshoot those DTCs first, then recheck for DTC P2227.
- Inspect the air cleaner element (see «AIR CLEANER ELEMENT INSPECTION/REPLACEMENT»(ref-221344-S42191303262006022400000) ). Is there damage or clogging? YES -Replace the air cleaner element (see «AIR CLEANER REMOVAL/INSTALLATION»(ref-221344-S13961149822006022400000) ). Clear the DTC with the HDS, then go to step 9 . NO -Go to step 2.
- Turn the ignition switch to ON (II), and wait 2 seconds.
- Check the BARO SENSOR in the DATA LIST with the HDS. Is about 101 kPa (29.9 in.Hg, 760 mmHg), or about 2.9 V at sea level indicated? YES -Go to step 4. NO -Go to step 8 .
- Clear the DTC with the HDS.
- Start the engine. Hold the engine speed at 3,000 RPM without load (in neutral) until the radiator fan comes on, then let it idle.
- Test-drive under these conditions, then connect the HDS. Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C) Transmission in 4th REL TP SENSOR A between 11 deg and 23 deg for 3 seconds or more
- Monitor the OBD STATUS for DTC P2227 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 NOT COMPLETED, go to step 5 and recheck.
- Update the ECM if it does not have the latest software (see «ECM UPDATE»(ref-351945-S31385529132009122900000) ), or substitute a known-good ECM (see «SUBSTITUTING THE ECM»(ref-221338-S28616532062006022400000) ).
- Start the engine. Hold the engine speed at 3,000 RPM without load (in neutral) until the radiator fan comes on, then let it idle.
- Test-drive under these conditions: Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C) Transmission in 4th REL TP SENSOR between 11 deg and 23 deg for 3 seconds or more
- Check for Temporary DTCs or DTCs with the HDS. Is DTC P2227 indicated? YES -Check for poor connections or loose terminals at the ECM, then go to step 1 . If the ECM was updated, substitute a known-good ECM (see «SUBSTITUTING THE ECM»(ref-221338-S28616532062006022400000) ), then recheck. If the ECM was substituted, go to step 1 . NO -Go to step 12.
- Monitor the OBD STATUS for DTC P2227 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM (see «ECM REPLACEMENT»(ref-351945-S35124653042009122900000) ). If any other Temporary DTCs or DTCs were indicated in step 11, go to the indicated DTC's troubleshooting. NO -If the screen indicates FAILED, check for poor connections or loose terminals at the ECM. If the ECM was updated, substitute a known-good ECM (see «SUBSTITUTING THE ECM»(ref-221338-S28616532062006022400000) ), then go to step 9 . If the ECM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, go to step 9 .