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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 508 (Engine Controls/Fuel - 5.3L, 6.0L, 6.2L - DTC P0420 To DTC P3449 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P2632 >> Circuit/System Description

Circuit/System Description

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The control module enables the secondary fuel pump relay when the ignition switch is turned ON. The control module will disable the secondary fuel pump relay within 2 seconds unless the control module detects ignition reference pulses. The control module continues to enable the secondary fuel pump relay as long as ignition reference pulses are detected. The control module disables the secondary fuel pump relay within 2 seconds if ignition reference pulses cease to be detected and the ignition remains ON.

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