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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 P1825: Invalid Transmission Range With The Engine Running >> 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. 3. HI values for all signals in all ranges indicates the ground circuit is OPEN.
  2. 4. With the 20-way connector disconnected, all signals should indicate HI.
  3. 6. If one circuit affects the other, this indicates a short between the two circuits.
  4. 13. This step tests the internal transmission harness. If no fault is found in the harness, the fault will be in the switch.
Fig 1: DTC P1825 Diagnosis (Steps 1-7)
G01501809Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P1825 Diagnosis (Steps 8-17)
G01501810Courtesy of GENERAL MOTORS CORP.
Fig 3: DTC P1825 Diagnosis (Steps 18-19)
G01501811Courtesy of GENERAL MOTORS CORP.
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