P0883-TCM POWER INPUT HIGH

For a complete wiring diagram Refer to Section 8W.

Theory of Operation

The Transmission Control Relay is used to supply power (Transmission Control Relay Output) to the Transmission Solenoid/TRS Assembly when in normal operating mode and to pins C4–19, C4–28 and C4–38 of the PCM. The purpose of the Transmission Control Relay is to allow the PCM to turn off the power to the Transmission Solenoid/TRS Assembly in event that the transmission should need to be placed into “limp-in” mode due to a DTC.

After a TCM reset, (ignition switch turned to the run position, or after cranking engine) the TCM verifies that the Transmission Control Relay contacts are open by checking for voltage on the Transmission Control Relay Output circuit before the Transmission Control Relay is energized. If voltage is detected, the DTC will set.

• When Monitored:

  When the ignition is turned from "OFF" position to "RUN" position and/or the ignition is turned from "START" position to "RUN" position.

• Set Condition:

  This DTC is set if the Transmission Control Module senses greater than 3.0 volts on the Transmission Control Relay Output circuits prior to a request from the TCM to energize the Transmission Control Relay.

Diagnostic Test

NOTE: This counter only applies to the last DTC set.