Audio Front Control Module (ACM): DTCs

AUDIO FRONT CONTROL MODULE (ACM) DTCs

DTC	Description	Possible Causes	Action
B1A56-01	Antenna - General electrical failure	Antenna connection is broken	Check the antenna connection and for signs damage. Renew as necessary.
B1D79-01	Microphone Input - General electrical failure	Microphone circuit open circuit, short circuit to ground or short circuit to power Microphone configuration mismatched with CCF	Refer to the electrical circuit diagrams and check the microphone input circuit. Configure the system using the approved diagnostic system. Where possible, refer to the guided diagnostic routine for this code on the approved diagnostic system.
U0010-88	Medium Speed CAN Communication Bus - Bus off	Bus off	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network.
U0187-4A	Lost Communication With Digital Disc Player/Changer Module "A" - Incorrect component installed	Incorrect component installed The security of the MOST network prevents the unauthorized addition of a module to the system	Configure the network to accept the module using the approved diagnostic system.
U0300-00	Software Incompatibility - No sub type information	No sub type information Volcano Master Configuration ID is incorrect	Configure the module using the approved diagnostic system.
U0300-48	Software Incompatibility - Supervision software failure	Supervision software failure	Clear the DTC and retest. If the problem persists, configure the module using the approved diagnostic system.
U1A14-48	CAN Initialization Failure - Supervision software failure	Audio control module supervision software failure	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network.
U1A14-49	CAN Initialization Failure - Internal electronic failure	Internal electronic failure	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network.
U2003-25	Fibre Optic Communication Bus - Signal shape/waveform failure	Signal shape/waveform error	Carry out the general media orientated system transport (MOST) test. Refer to the Network Communications instructions of the workshop information.
U2003-31	Fibre Optic Communication Bus - No signal	MOST ring break - no data received	Carry out the general media orientated system transport (MOST) test. Refer to the Network Communications instructions of the workshop information.
U2003-81	Fibre Optic Communication Bus - Invalid serial data received	Invalid serial data received	Carry out the general media orientated system transport (MOST) test. Refer to the Network Communications instructions of the workshop information.
U2003-86	Fibre Optic Communication Bus - Signal invalid	Signal invalid	Carry out the general media orientated system transport (MOST) test. Refer to the Network Communications instructions of the workshop information.
U2003-88	Fibre Optic Communication Bus - Bus off	Bus off	Carry out the general media orientated system transport (MOST) test. Refer to the Network Communications instructions of the workshop information.
U3000-48	Control Module - Supervision software failure	Audio unit supervision software failure (internal error)	Check the power and ground circuits to the component. Refer to the electrical circuit diagrams. Refer to the warranty policy and Procedures information if a module is suspect.
U3000-55	Control Module - Not configured	Audio unit not configured Can also be set by a harness fault EQ Setting not equal to car information of IHU	Configure the module using the approved diagnostic system.