DTC Set Condition
WARNING: This page is about a different car, the 2009 Mitsubishi Eclipse. However, it is still accessible from the selected car via links, so may be relevant.
The TCL/ASC-ECU receives engine system-related signals from the ECM < M/T > or PCM < A/T > via CAN bus lines. If a fail-safe related data is contained in the signal from the ECM < M/T > or PCM < A/T >, DTC U1120 will be stored.