Diagnostic Trouble Code (DTC) Index DTC: Audio Front Control Module (ACM)

NOTE: If a control module or component is suspect and the vehicle remains under manufacturer warranty, refer to the Warranty Policy and Procedures information , or determine if any prior approval program is in operation, before the replacement of a component.

NOTE: Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the manufacturer-approved diagnostic system).

NOTE: When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to three decimal places, and with an up-to-date calibration certificate. When testing resistance always take the resistance of the DMM leads into account.

NOTE: Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

NOTE: Inspect connectors for signs of water ingress, and pins for damage and/or corrosion.

NOTE: If DTCs are recorded and, after performing the pinpoint tests, a fault is not present, an intermittent concern may be the cause. Always check for loose connections and corroded terminals.

Description And Operation

For a detailed description of the audio front control system, refer to the relevant Description and Operation. Refer to Audio System .

AUDIO FRONT CONTROL MODULE (ACM)

DTC	Description	Possible Cause	Action
B1134-11	Phone input	Phone input circuit - short to ground	Refer to electrical circuit diagrams and check phone input circuit for short to ground
B1134-12	Phone input	Phone input circuit - short to power	Refer to electrical circuit diagrams and check phone input circuit for short to power
B1134-13	Phone input	Phone input circuit - open circuit	Refer to electrical circuit diagrams and check phone input circuit for open circuit
B1A01-11	Speaker #1	Left front speaker circuit - short to ground	Refer to electrical circuit diagrams and check left front speaker circuit for short to ground
B1A01-12	Speaker #1	Left front speaker circuit - short to power	Refer to electrical circuit diagrams and check left front speaker circuit for short to power
B1A01-1A	Speaker #1	Left front speaker circuit - resistance below threshold	Carry out pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A01-1B	Speaker #1	Left front speaker circuit - resistance above threshold	Carry out pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A01-1C	Speaker #1	Left front speaker circuit - voltage out of range	Carry out pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A02-11	Speaker #2	Right front speaker circuit - short to ground	Refer to electrical circuit diagrams and check right front speaker circuit for short to ground
B1A02-12	Speaker #2	Right front speaker circuit - short to power	Refer to electrical circuit diagrams and check right front speaker circuit for short to power
B1A02-1A	Speaker #2	Right front speaker circuit - resistance below threshold	Carry out pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A02-1B	Speaker #2	Right front speaker circuit - resistance above threshold	Carry out pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A02-1C	Speaker #2	Right front speaker circuit - voltage out of range	Carry out pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A03-11	Speaker #3	Left rear speaker circuit - short to ground	Refer to electrical circuit diagrams and check left rear speaker circuit for short to ground
B1A03-12	Speaker #3	Left rear speaker circuit - short to power	Refer to electrical circuit diagrams and check left rear speaker circuit for short to power
B1A03-1A	Speaker #3	Left rear speaker circuit - resistance below threshold	Carry out pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A03-1B	Speaker #3	Left rear speaker circuit - resistance above threshold	Carry out pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A03-1C	Speaker #3	Left rear speaker circuit - voltage out of range	Carry out pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A04-11	Speaker #4	Right rear speaker circuit - short to ground	Refer to electrical circuit diagrams and check right rear speaker circuit for short to ground
B1A04-12	Speaker #4	Right rear speaker circuit - short to power	Refer to electrical circuit diagrams and check right rear speaker circuit for short to power
B1A04-1A	Speaker #4	Right rear speaker circuit - resistance below threshold	Carry out pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A04-1B	Speaker #4	Right rear speaker circuit - resistance above threshold	Carry out pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A04-1C	Speaker #4	Right front speaker circuit - voltage out of range	Carry out pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A56-13	Antenna	Antenna circuit - open circuit	Refer to electrical circuit diagrams and check antenna circuit for open circuit
B1B69-11	Antenna 12 volt supply circuit	Antenna 12 volt supply circuit - short to ground	Refer to electrical circuit diagrams and check antenna 12 volt supply circuit for short to ground
B1B69-15	Antenna 12 volt supply circuit	Antenna 12 volt supply circuit - short to power, open circuit	Refer to electrical circuit diagrams and check antenna 12 volt supply circuit for short to power, open circuit
B1D19-16	Compact disc unit	Circuit voltage below threshold	Install a new integrated audio module, refer to the new module/component installation note at the top of the DTC Index. Refer to Audio Unit .
B1D19-77	Compact disc unit	Commanded position not reachable	Install a new integrated audio module, refer to the new module/component installation note at the top of the DTC Index. Refer to Audio Unit .
B1D19-93	Compact disc unit	No operation	Install a new integrated audio module, refer to the new module/component installation note at the top of the DTC Index. Refer to Audio Unit .
B1D78-11	Auxiliary input	Auxiliary input circuit - short to ground	Refer to electrical circuit diagrams and check auxiliary input circuit for short to ground
B1D78-12	Auxiliary input	Auxiliary input circuit - short to power	Refer to electrical circuit diagrams and check auxiliary input circuit for short to power
B1D78-13	Auxiliary input	Auxiliary input circuit - open circuit	Refer to electrical circuit diagrams and check auxiliary input circuit for open circuit
B1D79-11	Microphone input	Microphone input circuit - short to ground	Refer to electrical circuit diagrams and check microphone input circuit for short to ground
B1D79-12	Microphone input	Microphone input circuit - short to power	Refer to electrical circuit diagrams and check microphone input circuit for short to power
B1D79-13	Microphone input	Microphone input circuit - open circuit	Refer to electrical circuit diagrams and check microphone input circuit for open circuit
U3000-49	Control module	Internal electronic failure	Install a new control module, refer to the new module/component installation note at the top of the DTC Index. Refer to Audio Unit .
U3000-55	Control module	Incorrect car configuration data received	Check/up-date Car Configuration File using manufacturer approved diagnostic system
U3000-87	Control module	Missing message	Check CJB for DTCs and refer to DTC Index. Refer to Communications Network . Check information and entertainment module for Car Configuration File and MOST network DTCs and refer to relevant DTC Index. Carry out MOST/CAN network tests using the manufacturer approved diagnostic system
U3000-98	Control module	Component or system over temperature	Check for additional DTCs and refer to relevant DTC Index, check/monitor system for re-occurrence
U3003-62	Battery voltage	Mis-match in voltage, of 2 volts or more, between integrated control module and CJB	Carry out pinpoint tests associated with this DTC using the manufacturer approved diagnostic system