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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 448 (Engine Controls Self-Diagnostics - 6.0L Bi-Fuel & CNG) >> Diagnostic Tests >> DTC P1209: FICM Diagnostic Output PWM Signal Not Received By Pcm >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers in the diagnostic procedure.

  1. 2

    This step determines if the condition is present.

  2. 3

    If any of the listed DTCs are set, diagnose those DTCs first.

  3. 5

    This step verifies that the Fuel Injection Control Module (FICM) is supplying the correct output voltage. The open circuit voltage should be 5.0 volts.
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