P1795

DTC P1795

Steps 1-7:

Circuit Description
The Engine Control Module (ECM) sends throttle plate position data to the Transmission Control Module (TCM). The data is sent to the TCM through a communication network called the Controller Area Network (CAN). Two circuits are used to communicate CAN data between the ECM and TCM. A fault in the CAN will not cause DTC P1795 to set by itself. If c CAN fault occurs, other DTC'S will set before DTC P1795.
When the TCM receives invalid throttle plate position data from the ECM, then DTC P1795 will set. DTC P1795 is a type B DTC.

Conditions for Running the DTC
^ The ignition voltage is 8 - 18 volts.
^ The engine run time is greater than 6 seconds.
^ No other CAN errors present.

Conditions for Setting the DTC
The TCM receives no valid throttle plate position data from the ECM for 2.0 seconds.

Action Taken When the DTC Sets
^ The TCM requests the ECM to illuminate the Malfunction Indicator Lamp (MIL) during the second consecutive trip in which the Conditions for Setting the DTC are met.
^ The TCM turns off the pressure control solenoid. When the pressure control solenoid is off, line pressure is at maximum and updates to the Transmission Adaptive Pressure (TAP) memory cells are discontinued.
^ The TCM uses the ECM default throttle plate position value for determining shift speeds.
^ At the time of the first failure, the TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as a Failure Record.
^ At the time of the second failure, the ECM records the operating conditions when the Conditions for Setting the DTC are met. The ECM stores this information as a Freeze Frame.
^ The TCM stores DTC P1795 in TCM history during the second consecutive trip in which the Conditions for Setting the DTC are met.

Conditions for Clearing the DTC
^ The ECM turns OFF the MIL after the sixth consecutive drive trip in which the TCM does not send a MIL illumination request.
^ A scan tool can clear the DTC.
^ The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without a non emission related diagnostic fault occurring.
^ The TCM cancels the DTC default actions when the ignition is OFF long enough in order to power down the TCM.