P1887

DTC P1887 (3.0L)

Circuit Description
The Torque Converter Clutch (TCC) release switch is part of the automatic Transmission Fluid Pressure (TFP) manual valve position switch. The TFP manual valve position switch is attached to the control valve body. The TCC release switch is normally-closed.

The switch signals the TCM that the TCC is released. This is accomplished by torque converter release fluid pressure acting on the switch contact, thus opening the switch. When the voltage is high on the circuit, the TCM recognizes that the TCC is no longer engaged.

When the TCM determines that the TCC release switch is open, indicating that the TCC is not applied, and the TCC slip speed indicates that the TCC is applied, DTC P1887 sets. DTC P1887 is a type B DTC.

Conditions for Running the DTC
^ No ISS DTCs P0716 or P0717.
^ No TCC DTCs P0741 or P0742.
^ No TCC electrical DTC P1860.
^ The engine is running for greater than 5 seconds.
^ The engine torque is greater than 40 Nm (30 ft. lbs.).
^ The TCC is commanded ON.
^ The TCC slip speed is -20 to +60 RPM.

Conditions for Setting the DTC
The TCC release switch is open, release fluid pressure present, for 6 seconds.

Action Taken When the DTC Sets
^ The TCM requests the ECM to illuminate the Malfunction Indicator Lamp (MIL) during the second consecutive trip in which the Conditions for Setting the DTC are met.
^ The TCM inhibits TCC engagement.
^ The TCM freezes transmission adaptive functions.
^ The ECM records the operating conditions when the Conditions for Setting the DTC are met. The ECM stores this information as Freeze Frame and Failure Records.
^ 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 P1887 in TCM history during the second consecutive trip in which the Conditions for Setting the DTC are met.

Conditions for Clearing the MIL/DTC
^ The ECM turns OFF the MIL after the third consecutive drive trip in which the TCM does not send a MIL illumination request.
^ A scan tool can clear the MIL/DTC.
^ The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without an emission-related diagnostic fault occurring.
^ The TCM cancels the DTC default actions when the ignition switch is OFF long enough in order to power down the TCM.

Diagnostic Aids
Ensure the wiring harness is not stretched too tightly or other components are pressing on the connector body. Also, inspect for proper clearance to any other
components and wiring. Refer to Testing for Intermittent and Poor Connections.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
3. This step tests the ability of the TCM to recognize a grounded circuit.
7. This step tests for a mechanical or hydraulic condition.

Steps 1 - 5:

Steps 6 - 10:

Steps 11 - 12:

DTC P1887 (3.0L)