Circuit Description

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.