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Home >> Jeep >> 2020 >> Grand Cherokee Trackhawk >> Repair and Diagnosis >> External Pages >> Different car >> Section 273 (68RFE Automatic Transmission - DTCS P0875-00 To U1449-00 - 2500HD & 3500HD) >> DTC Troubleshooting >> P0882-00-TCM Power Input Low >> Theory Of Operation

Theory Of Operation

WARNING: This page is about a different car, the 2019 RAM 3500 HD and 2019 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

The Transmission Control Relay is used to supply power to the solenoids and pressure switches when the transmission is in normal operating mode. The relay output is fed back to the TCM through the Transmission Control Output circuits. When the relay is off, no power is supplied to the solenoids and pressure switches and the transmission will go into Limp-In or Default mode.

NOTE:

Inadequate Transmission Control Relay Output voltage can cause DTCs P0846, P0869, P0871, P0876 or P0988 to set. This does not indicate an internal transmission or solenoid/TRS problem. Repairing the P0882 fault should eliminate the related DTCs.

NOTE:

Due to different power control configurations, the Transmission Control Relay may be referred to as a PCM relay.

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