Adaptive Speed Control Module (ASCM)

WARNING: This page is about a different car, the 2012 Land Rover Range Rover Sport and 2011 Land Rover Range Rover Sport. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle.

NOTE: If the control module or a 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, prior to the installation of a new module/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 accurate to three decimal places, and with an up-to-date calibration certificate. When testing resistance always take the resistance of the digital multimeter 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.

NOTE: Check DDW for open campaigns. Refer to the corresponding bulletins and SSMs which may be valid for the specific customer complaint and carry out the recommendations as required.

The table below lists all Diagnostic Trouble Codes (DTCs) that could be logged in the Adaptive Speed Control Module (ASCM). For additional diagnosis and testing information, refer to the relevant Diagnosis and Testing informattion.

DTC	Description	Possible Cause	Action
B1A84-81	Car Configuration Data - Invalid serial data received	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Incorrect car configuration file parameters in the central junction box	Using the manufacturer approved diagnostic system, check and up-date the car configuration file as necessary. Clear the DTCs and retest
C1A67-54	Forward Looking Sensor - Missing calibration	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" The radar may be horizontally misaligned. This DTC will clear when the speed control sensor is correctly aligned	Refer to the relevant section of the workshop manual and carry out adaptive speed control sensor alignment procedure Investigate for signs of mild impact damage around radar and mounting bracket
C1A67-87	Forward Looking Sensor - Missing message	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Adaptive speed control module internal communication error between DSP and Host	Using the manufacturer approved diagnostic system, clear the DTCs and retest. If the fault persists, install a new adaptive speed control module
C1A67-96	Forward Looking Sensor - Component internal failure	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Adaptive speed control module internal communication error between DSP and Host	Using the manufacturer approved diagnostic system, clear the DTCs and retest. If the fault persists, install a new adaptive speed control module
C1A67-97	Forward Looking Sensor - Component or system operation obstructed or blocked	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "radar sensor blocked" Adaptive speed control module obstructed by snow, heavy rain or paint protection covering The adaptive speed control module misaligned	Check and clear any obstructions from the sensor. This DTC will be cleared automatically when environmental conditions allow Using the manufacturer approved diagnostic system, clear the DTCs and retest. If the fault persists, refer to the relevant section of the workshop manual and adjust the adaptive speed control module alignment
C1A67-98	Forward Looking Sensor - Component or system over temperature	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Adaptive speed control module sensor is over temperature	Using the manufacturer approved diagnostic system, clear the DTCs and retest Consider the atmospheric conditions before suspecting the component This fault will be cleared automatically when environmental conditions allow
P174E-29	Output Shaft Speed / ABS Wheel Speed Correlation - Signal invalid	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Speed signals mis-match	Using the manufacturer approved diagnostic system, check the anti-lock brake system control module for related DTCs and refer to the relevant DTC index Clear the DTCs and retest
U0001-88	High Speed CAN Communication Bus - Bus off	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" High speed CAN bus circuit short circuit to ground, short circuit to power, open circuit, high resistance	Using the manufacturer approved diagnostic system, perform a CAN network integrity test. Refer to the electrical circuit diagrams and check the high speed CAN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance
U0100-00	Lost Communication With ECM/PCM "A" - No sub type information	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Engine control module power or ground circuit open circuit, high resistance High speed CAN bus circuit short circuit to ground, short circuit to power, open circuit, high resistance	Refer to the electrical circuit diagrams and check the engine control module power and ground circuits for open circuit, high resistance Using the manufacturer approved diagnostic system, perform a CAN network integrity test. Refer to the electrical circuit diagrams and check the high speed CAN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance
U0101-00	Lost Communication with TCM - No sub type information	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Transmission control module power or ground circuit open circuit, high resistance High speed CAN bus circuit short circuit to ground, short circuit to power, open circuit, high resistance	Refer to the electrical circuit diagrams and check the transmission control module power and ground circuits for open circuit, high resistance Using the manufacturer approved diagnostic system, perform a CAN network integrity test. Refer to the electrical circuit diagrams and check the high speed CAN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance
U0103-00	Lost Communication With Gear Shift Control Module A - No sub type information	NOTE: Adaptive cruise control will function as normal Transmission control switch power or ground circuit open circuit, high resistance High speed CAN bus circuit short circuit to ground, short circuit to power, open circuit, high resistance	Refer to the electrical circuit diagrams and check the transmission control switch power and ground circuits for open circuit, high resistance Using the manufacturer approved diagnostic system, perform a CAN network integrity test. Refer to the electrical circuit diagrams and check the high speed CAN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance
U0121-00	Lost Communication With ABS Control Module - No sub type information - No sub type information	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Anti-lock brake system control module power or ground circuit open circuit, high resistance High speed CAN bus circuit short circuit to ground, short circuit to power, open circuit, high resistance	Refer to the electrical circuit diagrams and check the anti-lock brake system control module power and ground circuits for open circuit, high resistance Using the manufacturer approved diagnostic system, perform a CAN network integrity test. Refer to the electrical circuit diagrams and check the high speed CAN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance
U0128-00	Lost Communication With Park Brake Control Module - No sub type information	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Electric park brake control module power or ground circuit open circuit, high resistance High speed CAN bus circuit short circuit to ground, short circuit to power, open circuit, high resistance	Refer to the electrical circuit diagrams and check the electric park brake control module power and ground circuits for open circuit, high resistance Using the manufacturer approved diagnostic system, perform a CAN network integrity test. Refer to the electrical circuit diagrams and check the high speed CAN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance
U0155-00	Lost Communication With Instrument Panel Cluster (IPC) Control Module - No sub type information	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Electric park brake control module power or ground circuit open circuit, high resistance High speed CAN bus circuit short circuit to ground, short circuit to power, open circuit, high resistance	Refer to the electrical circuit diagrams and check the instrument cluster power and ground circuits for open circuit, high resistance Using the manufacturer approved diagnostic system, perform a CAN network integrity test. Refer to the electrical circuit diagrams and check the high speed CAN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance
U0300-00	Internal Control Module Software Incompatibility - No sub type information	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Car configuration signal not received Car configuration file incorrect	Using the manufacturer approved diagnostic system, check and up-date the car configuration file as necessary
U0300-55	Internal Control Module Software Incompatibility - Not configured	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Car configuration signal not received Car configuration file incorrect	Using the manufacturer approved diagnostic system, check and up-date the car configuration file as necessary
U0401-00	Invalid Data Received From ECM/PCM - No sub type information	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Missing/invalid data from the engine control module The engine control module did not respond correctly to the adaptive cruise control cancel request The engine control module did not respond correctly to the adaptive cruise control auto brake cancel request	Using the manufacturer approved diagnostic system, check the engine control module for related DTCs and refer to the relevant DTC index
U0401-67	Invalid Data Received From ECM/PCM - Signal incorrect after event	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Missing/invalid data from the engine control module The engine control module did not respond correctly to the adaptive cruise control resume active request	Using the manufacturer approved diagnostic system, check the engine control module for related DTCs and refer to the relevant DTC index
U0401-81	Invalid Data Received From ECM/PCM - Invalid serial data received	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Missing/invalid data from the engine control module The engine control module has inhibited the adaptive cruise control	Using the manufacturer approved diagnostic system, check the engine control module for related DTCs and refer to the relevant DTC index
U0415-53	Invalid Data Received From ABS Control Module - Deactivated	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Missing/invalid data from the anti-lock brake system control module	Using the manufacturer approved diagnostic system, check the anti-lock brake system control module for related DTCs and refer to the relevant DTC index
U0415-81	Invalid Data Received From ABS Control Module - Invalid serial data received	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Missing/invalid data from the anti-lock brake system control module	Using the manufacturer approved diagnostic system, check the anti-lock brake system control module for related DTCs and refer to the relevant DTC index
U0417-67	Invalid Data Received From Park Brake Control Module - Signal incorrect after event	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Missing/invalid data from the electric park brake control module The parking brake module did not respond correctly to the adaptive cruise control EPB apply request	Using the manufacturer approved diagnostic system, check the electric park brake control module for related DTCs and refer to the relevant DTC index
U0417-81	Invalid Data Received From Park Brake Control Module - Invalid serial data received	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Missing/invalid data from the electric park brake control module The parking brake module has inhibited the adaptive cruise control	Using the manufacturer approved diagnostic system, check the electric park brake control module for related DTCs and refer to the relevant DTC index
U0418-68	Invalid Data Received From Brake System Control Module - Event information	NOTE: Instrument pack displays warning message "forward alert not available Missing/invalid data from the anti-lock brake system control module The anti-lock brake system control module has inhibited intelligent emergency braking / advanced emergency brake assist functions	Using the manufacturer approved diagnostic system, check the anti-lock brake system control module for related DTCs and refer to the relevant DTC index
U0421-81	Invalid Data Received from Suspension Control Module A - Invalid serial data received	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Missing/invalid data from the air suspension control module The air suspension control module has inhibited the adaptive cruise control	Using the manufacturer approved diagnostic system, check the air suspension control module for related DTCs and refer to the relevant DTC index
U0423-81	Invalid Data Received From Instrument Panel Control Module - Invalid serial data received	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Missing/invalid data from the instrument cluster The instrument cluster has inhibited the adaptive cruise control Central junction box missing or not updated CAN message	Using the manufacturer approved diagnostic system, check the instrument cluster for related DTCs and refer to the relevant DTC index
U1A00-88	Private Communication Network - Bus off	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Speed control module indicates bus off, on private CAN bus	Using the manufacturer approved diagnostic system, clear the DTCs and retest. If the fault persists, contact dealer technical support. Under no circumstance should any parts be replaced to overcome this issue
U1A14-49	CAN Initialization Failure - Internal electronic failure	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" High speed CAN bus circuit short circuit to ground, short circuit to power, open circuit, high resistance	Using the manufacturer approved diagnostic system, perform a CAN network integrity test. Refer to the electrical circuit diagrams and check the high speed CAN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Clear the DTCs and retest
U2101-00	Control Module Configuration Incompatible - No sub type information	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Car configuration file mis-match	Using the manufacturer approved diagnostic system, check and up-date the car configuration file as necessary
U3000-41	Control Module - General checksum failure	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Speed control module internal micro controller error	Using the manufacturer approved diagnostic system, clear the DTCs and retest. If the fault persists, install a new adaptive speed control module
U3000-42	Control Module - General memory failure	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Adaptive speed control module internal failure RAM test error	Using the manufacturer approved diagnostic system, clear the DTCs and retest. If the fault persists, install a new adaptive speed control module
U3000-44	Control Module data - Memory failure	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Adaptive speed control module internal failure DSP RAM test error	Using the manufacturer approved diagnostic system, clear the DTCs and retest. If the fault persists, install a new adaptive speed control module
U3000-49	Control Module - Internal electronic failure	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Adaptive speed control module internal failure Clock error	Using the manufacturer approved diagnostic system, clear the DTCs and retest. If the fault persists, install a new adaptive speed control module
U3000-63	Control Module - Circuit/component protection time-out	NOTE: Instrument pack displays warning message "forward alert not available" Adaptive speed control module internal protection has been activated	Using the manufacturer approved diagnostic system, clear the DTCs and retest. If the fault persists, contact dealer technical support
U3000-96	Control Module - Component internal failure	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Speed control module hardware ID mismatch	Using the manufacturer approved diagnostic system, clear the DTCs and retest. If the fault persists, contact dealer technical support
U3003-16	Battery Voltage - Circuit voltage below threshold	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Adaptive speed control module power or ground circuit open circuit, high resistance Battery/charging system fault	Using the manufacturer approved diagnostic system, check datalogger signal - ECU Power Supply Voltage (0xD112). Refer to the electrical circuit diagrams and check the adaptive speed control module power and ground circuits for open circuit, high resistance Check the battery and charging system. Refer to BATTERY AND CHARGING SYSTEM - GENERAL INFORMATION .
U3003-17	Battery Voltage - Circuit voltage above threshold	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Battery/charging system fault	Using the manufacturer approved diagnostic system, check datalogger signal - ECU Power Supply Voltage (0xD112). Check battery and charging system. Refer to starting and charging and check the performance of the charging system. Refer to BATTERY AND CHARGING SYSTEM - GENERAL INFORMATION .
U3003-62	Battery Voltage - Signal compare failure	NOTE: Adaptive cruise control is disabled and instrument pack displays warning message "cruise not available" Mis-match between the voltage at the adaptive speed control module and the voltage value broadcast on the CAN bus	Using the manufacturer approved diagnostic system, check datalogger signal - ECU Power Supply Voltage (0xD112) - and compare it to battery voltage