System Description

The TCM uses the vehicle speed signal and signals from the transmission speed sensors (NC, NT) to detect the actual gear (1st, 2nd, 3rd, 4th, 5th or 6th gear).

Then the TCM compares the actual gear with the shift schedule in the TCM memory to detect mechanical problems of the shift solenoid valves and valve body.

DTC No.	DTC Detection Condition	Trouble Area
P0796	The engine revs freely when 2nd or 6th gear is commanded (2-trip detection logic). When the following is detected twice (2-trip detection logic): When 1st gear is commanded, 2nd gear is engaged.	Shift solenoid valve SL3 remains open or closed. Valve body is blocked. Automatic transaxle (clutch, brake or gear etc.)