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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 834 (Automatic Transmission - 4L80-E/4L85-E (Service & Replacement)) >> Diagnostic Information and Procedures >> DTC P0894: Excessive TCC Slip Speed In D4 OVERDRIVE >> Test Description

Test Description

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The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step tests the indicated range signal to the actual selected range. A faulty TFP manual valve position switch can set a DTC P0894.
  2. 4. This step tests for excessive TCC slip speed while in a commanded TCC lock-up state and in fourth gear; and confirms that the fault is present.
  3. 5. This step tests for excessive TCC slip speed while in a commanded TCC lock-up state and in third gear.
  4. 6. This step tests for a sticking TCC shift valve.
  5. 7. This step tests for proper transmission line pressure.
    Fig 1: Diagnostic Trouble Code (DTC P0894) Table (Step 1-7)
    G02112053Courtesy of GENERAL MOTORS CORP.
    Fig 2: Diagnostic Trouble Code (DTC P0894) Table (Step 8-11)
    G02112054Courtesy of GENERAL MOTORS CORP.
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