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Home >> Saturn >> 2005 >> L300 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Diagnosis - (DTC P0446 To DTC P2100) >> DTC Tests >> DTC P0700: Transmission Control Module (TCM) Requested MIL Illumination >> Circuit Description

Circuit Description

This DTC indicates that the engine control module (ECM) received a message from the transmission control module (TCM) to turn ON the malfunction indicator lamp (MIL) telltale due to a transmission related OBD 2 failure. The ECM will send a message via the controller area network (CAN) link to the body control module (BCM) who will send a message over the class 2 link to the instrument panel cluster (IPC) to turn ON the MIL.

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