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Home >> Chevrolet >> 1995 >> Corvette Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> ECM/Pcm Code Charts >> Code 28, Trans. Range Pressure Switch >> Test Description
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Test Description

NOTE: Test numbers refer to numbers on diagnostic chart.
  1. Checks indicated range signal to valve position signal actually selected.
  2. Checks for correct voltage from PCM to transmission external connector.
  3. Checks for short to ground in any one of the 3 valve position circuits.
Fig 1: Code 28 Schematic (Corvette) Transmission Range Pressure Switch
G95J14026
Fig 2: Code 28 Diagnostic Flow Chart (Corvette) Transmission Range Pressure Switch
G95E14021