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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1617 (Antilock Brake System) >> Diagnostic Information and Procedures >> DTC C0287, P1644, P1689: Delivered Torque Circuit & Control Delivered Torque Output Circuit >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. 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. This step tests for voltage supplied to the PCM from the EBCM.
  2. 9. The PCM may be damaged if the delivered torque signal circuit is shorted to voltage.
Fig 1: DTC C0287, P1644, Or P1689 (Steps 1-4)
G01481807Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC C0287, P1644, Or P1689 (Steps 5-12)
G01481808Courtesy of GENERAL MOTORS CORP.
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