P0882-TCM POWER INPUT LOW

For a complete wiring diagram Refer to Section 8W

Theory of Operation

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 pins 16, 17, and 36. It is referred to as "Transmission Control Relay Output". This circuit does not supply power to the TCM, it is only a sense circuit. When the relay is off, no power is supplied to the solenoids and pressure switches, and the transmission is in "limp-in" or "default" mode. Note: Inadequate Transmission Control Relay Output voltage can also cause DTCs P0846, P0869, P0871, P0876 or P0988 to set. This does not indicate an internal transmission or solenoid/TRS problem. Repairing the P0888 fault should also eliminate the related DTCs.

• 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 when less than 3.0 volts are present at the transmission control relay output circuits at the Transmission Control Module when the TCM is energizing the relay.

Diagnostic Test

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

NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.