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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1638 (Hybrid Energy Storage System - 3.6L (Hp5)) >> Diagnostic Information and Procedures >> Jump Assist >> Procedure Description

Procedure Description

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

During certain conditions such as long term vehicle storage, the drive motor battery may discharge to such a state that cranking of the engine is not possible.

Jump Assist is a procedure that allows the accessory DC power control module (APM) to convert 12V energy into 300V energy to charge the drive motor battery. Jump Assist is initiated with a scan tool output control. For the duration of the Jump Assist Procedure, the APM, hybrid powertrain control module (HPCM) and the battery energy control module (BECM) remain awake and communicating while the ignition is OFF.

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