P1811

Schematic:

The Powertrain Control Module (PCM)/Transmission 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 P1811 is a type C DTC.

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.

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.