| DTC P0843: | Open in 2nd Clutch Transmission Fluid Pressure Switch Circuit, or 2nd Clutch Transmission Fluid Pressure Switch Stuck OFF |
| 1. | Clear the DTC in CLEAR MENU with the Honda PGM Tester or HDS. |
| 2. | Start the engine, and warm it up to normal operating temperature (the radiator fan comes on). Shift into the [M] position 2nd gear while pressing the brake pedal, and verify that the SHIFT MAP NUMBER indicates 2nd with the Honda PGM Tester or HDS in the A/T data list. |
| 3. | Check the 2nd PRES SWITCH signal with the Honda PGM Tester or HDS in the A/T data list. Is the 2nd PRES SWITCH ON? YES - Go to 4. NO - Go to 6. |
| 4. | Drive the vehicle in 2nd gear in the [M] position for about 5 seconds, then upshift to 4th gear, and drive in 4th gear for about 5 seconds. Slow down and stop the wheels. |
| 5. | Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0843. Did the result fail? YES - Go to 6. NO - Intermittent failure, the system is OK at this time. If the tester indicates NOT COMPLETE, return to step 4 and recheck.n |
| 6. | Turn the ignition switch OFF. |
| 7. | Disconnect the 2nd clutch transmission fluid pressure switch connector. |
| 8. | Turn the ignition switch ON (II). |
| 9. | Measure the voltage between the 2nd clutch transmission fluid pressure switch connector terminal and body ground. Is there about 5 V? YES - Replace the 2nd clutch transmission fluid pressure switch . After replacing the switch, go to 11, and check that the repair has been completed. NO - Go to 10. |
| 10. | Measure the voltage between PCM connector terminal C13 and body ground. Is there about 5 V? YES - Repair open in the wire between PCM connector terminal C13 and the 2nd clutch transmission fluid pressure switch.n NO - Check for loose or poor connections at PCM connector terminal C13. If the connections are OK, update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM.n |
| 11. | Clear the DTC in CLEAR MENU with the Honda PGM Tester or HDS. |
| 12. | Test-drive the vehicle for several minutes under the same conditions as those indicated by the freeze data. |
| 13. | Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0843. Did the result pass? YES - The problem has been corrected.n NO - Return to step 1 and recheck.n |