Test Description

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The numbers below refer to the step numbers on the diagnostic table.

4. This step tests for voltage supplied to the EBCM from the PCM.
5. This step verifies the EBCM is creating a requested torque signal with a valid Hz frequency.
6. This step verifies the EBCM is creating a requested torque signal with a valid duty cycle.
7. The EBCM may be damaged if the requested torque signal circuit is shorted to voltage.

Fig 1: DTC C0298 Or P1571 (1 Of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC C0298 Or P1571 (2 Of 2)

Courtesy of GENERAL MOTORS CORP.