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Home >> Pontiac >> 2001 >> Aztek Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 109 (Engine Controls - Self-Diagnostics - 3.5L) >> Diagnostic Tests >> DTC P1640: Output Driver Module 1 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue and 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

Output Driver Modules (ODM) are chips that are inside the Powertrain Control Module (PCM). ODMs provide grounded outputs that control devices. Each output has an internal feedback circuit that connects to the PCM microprocessor. ODM 1 determines if voltage or current may cause damage to the PCM. The PCM monitors voltage through ignition 1 input. Any incorrect current that is on a circuit to ODM will cause the ODM to report DTC P1640.

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