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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 438 (Engine Control System - Self-Diagnostics - 5.3L) >> Diagnostic Tests >> DTC P0230: Fuel Pump Control Relay Circuit >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 GMC Envoy XL and 2003 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 in the diagnostic procedure.

  1. 4

    This step verifies that the PCM is providing voltage to the fuel pump relay.

  2. 5

    This step tests for an open in the ground circuit to the fuel pump relay.

  3. 6

    This step determines if voltage is constantly being applied to the control circuit of the fuel pump relay.

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