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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 942 (Anti-Lock Brake System) >> Diagnostic Information and Procedures >> DTC C0298: Powertrain Indicated Traction Control Malfunction; P1571: TCS PWM Circuit No Frequency >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. 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. 4.  This step tests for voltage supplied to the EBCM from the PCM.
  2. 5.  This step verifies the EBCM is creating a requested torque signal with a valid Hz frequency.
  3. 6.  This step verifies the EBCM is creating a requested torque signal with a valid duty cycle.
  4. 7.  The EBCM may be damaged if the requested torque signal circuit is shorted to voltage.
Fig 1: DTC C0298 Or P1571 Table
G01706141Courtesy of GENERAL MOTORS CORP.
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