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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 874 (Automatic Transaxle Diagnosis, Service & Repair - 4T65-E) >> Diagnostic Information and Procedures >> DTC P1823: IMS Signal P Is Always Low >> 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. A LOW signal indicates a short to ground in the vehicle harness or the PCM.
  2. 5. This step tests the internal transmission harness without the IMS connected.
Fig 1: DTC P1823 Diagnosis (Steps 1-8)
G01501806Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P1823 Diagnosis (Steps 9-10)
G01501807Courtesy of GENERAL MOTORS CORP.
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