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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 138 (Automatic Transaxle Diagnosis - 4T65-E) >> Diagnostic Tests >> DTC P0742: TCC System Stuck On >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

The numbers listed below refer to step numbers in the diagnostic procedure:

  1. 2  - A YES answer indicates that the TCC is functioning properly.
  2. 4  - With the 20-pin connector disconnected, the PCM should interpret the open circuit as TCC release pressure present.
  3. 5  - An open condition in the TCC release circuit or switch would set DTC P1887. Open circuits are not diagnosed in DTC P0742.
  4. 8  - This step tests for a mechanical or hydraulic condition that would cause the TCC to be stuck ON.

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