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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1788 (Automatic Transmission - 4L60-E/4L65-E (Diagnosis)) >> Diagnostic Information and Procedures >> DTC P0785 (4.2L): 3-2 Shift Solenoid Circuit Electrical >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 4. This step tests the ability of the PCM to control the solenoid.
  2. 5. This step tests for voltage to the solenoid.
  3. 6. This step tests the ability of the PCM and the wiring to control the ground circuit.
  4. 8. This step measures the resistance of the automatic transmission (AT) wiring harness assembly and the 3-2 SS valve assembly.
Fig 1: DTC P0785 - 4.2L (Steps 1-5)
G02131518Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P0785 - 4.2L (Steps 6-14)
G02131519Courtesy of GENERAL MOTORS CORP.
Fig 3: DTC P0785 - 4.2L (Steps 15-22)
G02131520Courtesy of GENERAL MOTORS CORP.
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