P1792

DTC P1792 (3.0L)

Circuit Description
The Engine Control Module (ECM) sends engine coolant temperature data to the Transmission Control Module (TCM). The TCM uses this data to initiate warm-up shift patterns and to establish default Transmission Fluid Temperature (TFT) values. 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 P1792 to set by itself. If a CAN fault occurs, other DTCs will set before DTC P1792. When the TCM receives invalid engine coolant temperature data from the ECM, DTC P1792 sets. DTC P1792is a type C DTC.

Conditions for Running the DTC
No other CAN errors are present.

Conditions for Setting the DTC
The TCM receives no valid engine coolant temperature data from the ECM for 1 second.

Action Taken When the DTC Sets
^ The TCM does not request the ECM to illuminate the Malfunction Indicator Lamp (MIL).
^ The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as Failure Records.
^ The TCM stores DTC P1792 in TCM history.

Conditions for Clearing the DTC
^ 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 fault no longer exists and the DTC passes.

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DTC P1792 (3.0L)