Theory Of Operation

WARNING: This page is about a different car, the 2016 Dodge Journey and 2015 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.

The Transmission Control Output circuit is used to supply power to the Powertrain Control Module (PCM), Transmission Solenoid/Pressure Switch Assembly, Transmission Range Sensor (TRS) and the Line Pressure Sensor/Variable Force Solenoid when in normal operating mode. The purpose of the Transmission Output circuit is to allow the Transmission Control System to turn off the power to these components in event that the transmission should need to be placed into "limp-in" mode due to a DTC.

After a PCM reset, (ignition switch turned to the run position, or after cranking the engine) the Transmission Control System verifies that the Transmission Output circuit is open by checking for voltage on the Transmission Output circuits before the Transmission Control System request for the circuit to be powered up. The PCM/TCM relay request is direct circuit control from the PCM to the PDC. If the Transmission Control System detects less that 3.0 volts when the output is commanded on, the DTC will set.Note: Inadequate Transmission Control Output voltage can also cause DTCs P0846, or P0871, to set. This does not indicate an internal transmission or solenoid/TRS problem. Repairing the P0882 fault should also eliminate the related DTCs.