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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 484 (Automatic Transaxle Diagnosis, Service & Repair - 4T65-E) >> Diagnostic Information and Procedures >> DTC P1819: IMS Signals Invalid >> 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 both Park and Drive 4 indicates the ground circuit is OPEN.
  2. 5. With the 20-way connector disconnected, all signals should indicate #1.
  3. 7. 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 P1819 Diagnosis (Steps 1-6)
G01501796Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P1819 Diagnosis (Steps 7-15)
G01501797Courtesy of GENERAL MOTORS CORP.
Fig 3: DTC P1819 Diagnosis (Steps 16-20)
G01501798Courtesy of GENERAL MOTORS CORP.
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