General Description (R18A1 Engine)

When a malfunction occurs in the internal communication between the FI CPU and the A/T CPU in the powertrain control module (PCM) and the internal communication is interrupted for a set time or more, or when the watchdog timer that monitors the A/T CPU detects an abnormality in the A/T CPU and notifies the FI CPU via the A/T CPU check signal line, the PCM detects a malfunction and a DTC is stored.