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Home >> Acura >> 2009 >> RL >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Advanced Diagnostics >> DTC U0122: F-CAN Malfunction (VSA Modulator-Control Unit-PCM) (V6 engine A/T) >> General Description (V6 engine A/T)
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General Description (V6 engine A/T)

The controller area network (CAN) transmits/receives pulsing signals to/from the control modules simultaneously by using two signal lines (CANH and CANL).

When the powertrain control module (PCM) does not receive the signals via the CAN lines for more than a set time, the PCM detects a malfunction and a DTC is stored.