1. 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, go to Step 11 .
NO | - | Check for loose or poor connections at PCM connector terminal C13. If the connection is 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 .■

1. Clear the DTC with the HDS.

1. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on). Drive the vehicle in 2nd gear in the M position for more than 5 seconds, then upshift to 4th gear, and drive in 4th gear for more than 5 seconds. Slow down to a stop.

1. Monitor the OBD status for P0843 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the result indicate a pass?

YES | - | The problem has been corrected.■
NO | - | Return to Step 1 and recheck.■