Fault Code Audio Front Control Module (ACM) (Freelander 2)

Front audio control unit

NOTE: If a unit or component is likely to fail and the vehicle is still under manufacturer's warranty, refer to the warranty manual before replacing the component (section B1.2) or determine if there is any previously approved special program in operation.

NOTE: Universal Scan Tools may not read the listed codes or may only read 5-digit codes. Match the 5 digits from the scan tool with the first 5 digits of the 7-digit code listed to identify the problem (the last 2 digits give additional information read by the diagnostic system approved by the manufacturer).

NOTE: Always use a digital multimeter when performing voltage or resistance tests (DMM) accurate to three decimal places and with a valid calibration certificate. When testing resistance, be sure to consider the resistance of the DMM leads.

NOTE: Before starting diagnostic programs using troubleshooting tests, check and correct major problems.

NOTE: Inspect the connectors for signs of water intrusion and their pins for damage and (or) traces of corrosion.

NOTE: If DTCs are logged and there is no problem after performing troubleshooting tests, an intermittent problem may be the cause. Be sure to check for loose connections and corroded contacts.

Description and operation

For a detailed description of the front audio control unit, see the corresponding section «Description and operation» repair manuals. For more information, see the chapter: Audio system (415-01 Infotainment system, Description and operation).

DTC	Description	Possible reason	Action
B1134-11	Telephone signal input	Telephone signal input circuit short circuit to ground	Refer to electrical circuit diagrams and check phone input circuit for short to ground
B1134-12	Telephone signal input	Telephone signal input circuit - short circuit to power	Refer to electrical circuit diagrams and check phone input circuit for short to power
B1134-13	Telephone signal input	Telephone signal 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 front left speaker circuit for short to ground
B1A01-12	Speaker #1	Left front speaker circuit - short to power	Refer to electrical circuit diagrams and check front left speaker circuit for short to power
B1A01-1A	Speaker #1	Left Front Speaker Circuit - Resistance Below Threshold	Perform the troubleshooting tests associated with this DTC using the manufacturer approved diagnostic system
B1A01-1B	Speaker #1	Left front speaker circuit - resistance above threshold	Perform the troubleshooting tests associated with this DTC using the manufacturer approved diagnostic system
B1A01-1C	Speaker #1	Left Front Speaker Circuit Voltage Out of Range	Perform the troubleshooting 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	Perform the troubleshooting tests associated with this DTC using the manufacturer approved diagnostic system
B1A02-1B	Speaker #2	Right front speaker circuit - resistance above threshold	Perform the troubleshooting tests associated with this DTC using the manufacturer approved diagnostic system
B1A02-1C	Speaker #2	Right front speaker circuit voltage out of range	Perform the troubleshooting 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 rear left speaker circuit for short to ground
B1A03-12	Speaker #3	Left Rear Speaker Circuit - Short to Power	Refer to electrical circuit diagrams and check rear left speaker circuit for short to power
B1A03-1A	Speaker #3	Left rear speaker circuit - resistance below threshold	Perform the troubleshooting tests associated with this DTC using the manufacturer approved diagnostic system
B1A03-1B	Speaker #3	Left rear speaker circuit - resistance above threshold	Perform the troubleshooting tests associated with this DTC using the manufacturer approved diagnostic system
B1A03-1C	Speaker #3	Left rear speaker circuit voltage out of range	Perform the troubleshooting 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	Perform the troubleshooting tests associated with this DTC using the manufacturer approved diagnostic system
B1A04-1B	Speaker #4	Right rear speaker circuit - resistance above threshold	Perform the troubleshooting tests associated with this DTC using the manufacturer approved diagnostic system
B1A04-1C	Speaker #4	Right front speaker circuit voltage out of range	Perform the troubleshooting tests associated with this DTC using the manufacturer approved diagnostic system
B1A56-13	Antenna	Antenna circuit: open circuit	Refer to electrical diagrams and check antenna circuit for open circuit
B1B69-11	Antenna 12V Power Circuit	12V Antenna Power Circuit Short to Ground	Refer to electrical circuit diagrams and check antenna 12V power circuit for short to ground
B1B69-15	Antenna 12V Power Circuit	12V Antenna Power Circuit Short to Power, Open Circuit	Refer to electrical circuit diagrams and check antenna 12V supply circuit for short to power and open circuit
B1D19-16	CD player block	Circuit voltage below limit	Install a new integrated audio unit, see the new module/component installation note at the beginning of the DTC index. For more information, see the chapter: Audio block (415-01 Infotainment system, Removal and installation).
B1D19-77	CD player block	Target position not reached	Install a new integrated audio unit, see the new module/component installation note at the beginning of the DTC index. For more information, see the chapter: Audio block (415-01 Infotainment system, Removal and installation).
B1D19-93	CD player block	Does not work	Install a new integrated audio unit, see the new module/component installation note at the beginning of the DTC index. For more information, see the chapter: Audio block (415-01 Infotainment system, Removal and installation).
B1D78-11	Auxiliary input	Bodywork input circuit short circuit to ground	Refer to electrical circuit diagrams and check accessory input circuit for short to ground
B1D78-12	Auxiliary input	Accessory Input Circuit - Short to Power	Refer to electrical circuit diagrams and check accessory input circuit for short to power
B1D78-13	Auxiliary input	Accessory input circuit open circuit	Refer to electrical circuit diagrams and check accessory input circuit for open circuit
B1D79-11	Microphone input	Microphone input circuit short circuit to ground	Refer to electrical circuit diagrams and check microphone input circuit for short to ground
B1D79-12	Microphone input	Microphone input circuit - short circuit 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 block	Internal malfunction of electronic equipment	Install a new control module, see the new module/component installation note at the beginning of the DTC index. For more information, see the chapter: Audio block (415-01 Infotainment system, Removal and installation).
U3000-55	Control block	Incorrect vehicle configuration data received	Check/update vehicle configuration file using manufacturer approved diagnostic system
U3000-87	Control block	Missing message	Check the central junction box for DTCs and refer to the DTC index. For more information, please refer to the chapter: Communication Network (418-00 Module communication network, Diagnostics and checks). Check the infotainment system module for DTCs for the vehicle and MOST network configuration file and refer to the appropriate DTC index. Perform MOST/CAN network tests using the manufacturer approved diagnostic system
U3000-98	Control block	Elevated element or system temperature	Check for additional DTCs and refer to appropriate DTC index, check/monitor system for reoccurrence
U3003-62	Battery voltage	Voltage mismatch of 2 V or more between the integrated control unit and the central junction box	Perform the troubleshooting tests associated with this DTC using the manufacturer approved diagnostic system