P1811

P1811 - MAXIMUM ADAPT AND LONG SHIFT





The Powertrain Control Module (PCM)/Transaxle Control Module (TCM) modifies the transaxle line pressure through the pressure control solenoid valve (PC Sol. Valve), in order to control shift time and consistency. The PCM/TCM monitors various inputs and modifies the shift execution and timing by applying a calculated duty cycle to the PC Sol. Valve. The PCM/TCM alters the shifting based on driving habits, transaxle load, and internal transaxle condition. When the PCM/TCM detects long shifts that cannot be shortened by shift adapts two times during the same ignition cycle, then DTC P1811 sets.

DTC PARAMETERS
The shift time is greater than 0.65 seconds at maximum adapt or pressure, for a total of two times during the same ignition cycle.
Pl811 is a (type C) DTC

DIAGNOSTIC AIDS
- Ask customer about vehicle overloading, exceeding trailer-towing limit or towing in Overdrive.
- If after several unsuccessful attempts to gain accurate shift times, and an adapt can be made, reset adapts and road test vehicle in order to assure proper shifting.
- If proper shifting cannot be obtained, refer to the appropriate performance chart for shift problem.