DTC U1A14-49: CAN Initialisation failure - Internal electronic failure: Action
- Using the manufacturer approved diagnostic system, perform a CAN network integrity test. Refer to the appropriate system wiring diagrams and check the medium speed CAN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance
- Using the manufacturer approved diagnostic system, clear the DTCs and retest. If the fault persists, install a new automatic temperature control module