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Home >> Chevrolet >> 2002 >> Astro Van Passenger, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 827 (Automatic Transmission - 4L60-E/4L65-E (Service & Replacement)) >> Diagnostic Information and Procedures >> DTC P0748: PC Solenoid Valve Duty Cycle Has Reached Its High Limit >> Test Description

Test Description

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

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

  1. 2. This step tests the ability of the PCM to command the PC solenoid valve.
  2. 3. This step tests the PC solenoid valve and automatic transmission (AT) wiring harness assembly for incorrect resistance.
Fig 1: DTC P0748 Diagnosis (Steps 1-6)
G01565715Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P0748 Diagnosis (Steps 7-16)
G01565716Courtesy of GENERAL MOTORS CORP.
Fig 3: DTC P0748 Diagnosis (Steps 17-20)
G01565717Courtesy of GENERAL MOTORS CORP.
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