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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 853 (Automatic Transaxle Diagnosis, Service & Repair - 4T65-E) >> Diagnostic Information and Procedures >> DTC P0748: Duty Cycle Is Outside The Range Of 0.5-95% >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. 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 verifies that the fault is present.
  2. 3. This step tests the transmission wiring harness and the PC solenoid valve for correct resistance.
  3. 9. This step begins diagnosis of the engine side of the circuit.
Fig 1: DTC P0748 Diagnosis (Steps 1-4)
G01501769Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P0748 Diagnosis (Steps 5-10)
G01501770Courtesy of GENERAL MOTORS CORP.
Fig 3: DTC P0748 Diagnosis (Steps 11-18)
G01501771Courtesy of GENERAL MOTORS CORP.
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