Adaptive Cruise Control Module (ASCM)

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:

Guided Diagnostics must be followed and the repair advised by the process completed. Failure to do so may result in the rejection of any warranty claim made.
If a control module or a component is at fault 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.
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 Jaguar Land Rover approved diagnostic equipment).
When performing voltage or resistance tests, always use a digital multimeter that has the resolution ability to view 3 decimal places. For example, on the 2 volts range can measure 1 mV or 2 kΩ range can measure 1 Ω. When testing resistance always take the resistance of the digital multimeter leads into account.
Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.
Inspect connectors for signs of water ingress, and pins for damage and/or corrosion.
If Diagnostic Trouble Code(s) 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.
Check the JLR claims submission system for open campaigns. Refer to the corresponding bulletins and SSMs which may be valid for the specific customer complaint and complete the recommendations as required.

The article below lists all Diagnostic Trouble Code(s) that could be set in the Adaptive Cruise Control Module (ASCM). For additional diagnosis and testing information, refer to the relevant Diagnosis and Testing article in the repair information. For additional information, Refer to: SPEED CONTROL

DTC	DESCRIPTION	POSSIBLE CAUSES	ACTION
C0078-61	Tire Diameter - Signal calculation failure	Vehicle wheel spin Wheel/tire size incorrect Steering angle sensor system fault Anti-lock braking system fault Restraints control module fault	NOTE: DO NOT replace the adaptive cruise control module for this DTC Confirm if the vehicle has been subject to driving conditions which may have induced wheel spin Check that the wheels and tires comply with the manufacturer's specification for the vehicle. Rectify as necessary Using the Jaguar Land Rover approved diagnostic equipment, check for steering angle sensor related Diagnostic Trouble Code(s) and refer to the relevant DTC index Using the Jaguar Land Rover approved diagnostic equipment, check the restraints control module for yaw rate lateral acceleration sensor related Diagnostic Trouble Code(s) and refer to the relevant DTC index Using the Jaguar Land Rover approved diagnostic equipment, check the anti-lock braking system for related Diagnostic Trouble Code(s) and refer to the relevant DTC index Cycle ignition. Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest
C1A67-25	Forward Looking Sensor - Signal shape/waveform failure	Adaptive cruise control module operation corrupted by an external radar signal Adaptive cruise control module internal temperature greater than maximum threshold	NOTE: DO NOT replace the cruise control module for this DTC Check to see if this DTC only sets at specific locations, this could be due to environmental factors interfering with the radar signals Check for non-genuine accessories (for example, spot lights, winches, bull bars as the placement of these may block or interfere with the adaptive cruise control module radar operation). Rectify as necessary Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest. If the problem persists, move the vehicle to another location (away from potential sources of external interference) Allow the system temperature to return to normal. Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s), cycle ignition and retest
C1A67-54	Forward Looking Sensor - Missing calibration	Adaptive cruise control system not calibrated	NOTE: Check to see if any of the following Diagnostic Trouble Code(s) are set, C0078-61/C1A67-25/C1A67-97/U0046-81/U0046-87/U0300-56/U0305-00/U0305-54/U3000-49/U3000-92/U3000-93/U3000-94/U3000-98/U3006-17. If any of the listed Diagnostic Trouble Code(s) are set, repair these first Check for signs of impact damage around the adaptive cruise control module and mounting bracket. Rectify as necessary Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest. If the fault persists, refer to the relevant article of the repair information and adjust the adaptive cruise control module alignment Cycle ignition. Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest
C1A67-78	Forward Looking Sensor - Alignment or adjustment incorrect	Adaptive cruise control module misaligned	NOTE: Check to see if any of the following Diagnostic Trouble Code(s) are set, C0078-61/C1A67-25/C1A67-97/U0046-81/U0046-87/U0300-56/U0305-00/U0305-54/U3000-49/U3000-92/U3000-93/U3000-94/U3000-98/U3006-17. If any of the listed Diagnostic Trouble Code(s) are set, repair these first Check for signs of impact damage around the adaptive cruise control module and mounting bracket. Rectify as necessary Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest. If the fault persists, refer to the relevant article of the repair information and adjust the adaptive cruise control module alignment Cycle ignition. Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest
C1A67-97	Forward Looking Sensor - Component or system operation obstructed or blocked	Adaptive cruise control module obstructed	NOTE: DO NOT replace the adaptive cruise control module for this DTC This DTC may be set historically whenever adverse conditions such as rain, ice or mud cause an obstruction of the forward looking radar. Therefore, clear the DTC and retest to check if this is a current fault before taking any further action Check for non-genuine accessories (for example, spot lights, winches, bull bars as the placement of these may block or interfere with the adaptive cruise control module radar operation). Rectify as necessary Check the adaptive cruise control module for obstructions. Rectify as necessary With the adaptive cruise control active perform a road test for approximately 20 minutes at speeds no lower than 30kph to confirm the system is operating correctly
U0046-55	Vehicle Communication Bus C - Not configured	Car configuration file mismatch with vehicle specification	Using the Jaguar Land Rover approved diagnostic equipment, reconfigure the adaptive cruise control module with the latest level software Cycle ignition. Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest. If the fault persists, install a new adaptive cruise control module Refer to the relevant article of the repair information and calibrate the cruise control system
U0046-81	Vehicle Communication Bus C - Invalid serial data received	Invalid data received from another control module through the high speed CAN bus (chassis) - Fault in other system	NOTE: DO NOT replace the adaptive cruise control module for this DTC Using the Jaguar Land Rover approved diagnostic equipment, check the snapshot data to determine the invalid data source control module. Check the relevant control module for related Diagnostic Trouble Code(s) and refer to the relevant DTC index
U0046-82	Vehicle Communication Bus C - Alive/sequence counter incorrect/not updated	Invalid data received from another control module through the high speed CAN bus (chassis) - Fault in other system	NOTE: DO NOT replace the adaptive cruise control module for this DTC Using the Jaguar Land Rover approved diagnostic equipment, check the snapshot data to determine the invalid data source control module. Check the relevant control module for related Diagnostic Trouble Code(s) and refer to the relevant DTC index
U0046-83	Vehicle Communication Bus C - Value of signal protection calculation incorrect	Invalid data received from another control module through the high speed CAN bus (chassis) - Fault in other system	NOTE: DO NOT replace the adaptive cruise control module for this DTC Using the Jaguar Land Rover approved diagnostic equipment, check the snapshot data to determine the invalid data source control module. Check the relevant control module for related Diagnostic Trouble Code(s) and refer to the relevant DTC index
U0046-87	Vehicle Communication Bus C - Missing message	Other control module power or ground circuit open circuit, high resistance. High speed CAN bus (chassis) circuit short circuit to ground, short circuit to power, open circuit, high resistance Missing message from another control module through the high speed CAN bus (chassis) - Fault in other system	NOTE: DO NOT replace the adaptive cruise control module for this DTC Using the Jaguar Land Rover approved diagnostic equipment, check the snapshot data to determine the missing message source control module. Refer to the appropriate system wiring diagrams and check the relevant control module power and ground circuits for open circuit, high resistance. Repair the wiring harness as necessary Refer to the appropriate system wiring diagrams and check the high speed CAN bus (chassis) circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary Using the Jaguar Land Rover approved diagnostic equipment, check the snapshot data to determine the missing message source control module. Check the relevant control module for related Diagnostic Trouble Code(s) and refer to the relevant DTC index
U0046-88	Vehicle Communication Bus C - Bus off	High speed CAN bus (chassis) circuit short circuit to ground, short circuit to power, open circuit, high resistance	NOTE: DO NOT replace the adaptive cruise control module for this DTC Refer to the appropriate system wiring diagrams and check the high speed CAN bus (chassis) circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary
U0300-00	Internal Control Module Software Incompatibility - No sub type information	Adaptive cruise control module is not configured correctly	Using the Jaguar Land Rover approved diagnostic equipment, reconfigure the adaptive cruise control module with the latest level software. Clear the Diagnostic Trouble Code(s), cycle the ignition and retest If the fault persists, contact Jaguar Land Rover technical assistance
U0300-56	Internal Control Module Software Incompatibility - Invalid/incomplete configuration	Adaptive cruise control module internal failure	Cycle ignition. Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest. If the fault persists, install a new cruise control module Refer to the relevant article of the repair information and calibrate the adaptive cruise control system
U0305-00	Software Incompatibility with Cruise Control Module - No sub type information	Adaptive cruise control module is not configured correctly	Using the Jaguar Land Rover approved diagnostic equipment, reconfigure the adaptive cruise control module with the latest level software Cycle ignition. Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest. If the fault persists, install a new adaptive cruise control module Refer to the relevant article of the repair information and calibrate the adaptive cruise control system
U0305-54	Software Incompatibility with Cruise Control Module - Missing calibration	Car configuration file mismatch with vehicle specification Adaptive cruise control module is not configured correctly	Using the Jaguar Land Rover approved diagnostic equipment, reconfigure the adaptive cruise control module with the latest level software Cycle ignition. Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest. If the fault persists, install a new adaptive cruise control module Refer to the relevant article of the repair information and calibrate the adaptive cruise control system
U1A00-81	Private Communication Network - Invalid serial data received	Private CAN bus circuit short circuit to ground, short circuit to power, open circuit, high resistance Intelligent emergency braking system fault	NOTE: DO NOT replace the adaptive cruise control module for this DTC Refer to the appropriate system wiring diagrams and check the private CAN bus circuit between the image processing control module and the adaptive cruise control module for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary Using the Jaguar Land Rover approved diagnostic equipment, check the image processing module for related Diagnostic Trouble Code(s) and refer to the relevant DTC index
U1A00-82	Private Communication Network - Alive/sequence counter incorrect/not updated	Private CAN bus circuit short circuit to ground, short circuit to power, open circuit, high resistance Intelligent emergency braking system fault	Refer to the appropriate system wiring diagrams and check the private CAN bus circuit between the image processing control module and the adaptive cruise control module for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary Using the Jaguar Land Rover approved diagnostic equipment, check the image processing module for related Diagnostic Trouble Code(s) and refer to the relevant DTC index
U1A00-83	Private Communication Network - Value of signal protection calculation incorrect	Private CAN bus circuit short circuit to ground, short circuit to power, open circuit, high resistance Intelligent emergency braking system fault	Refer to the appropriate system wiring diagrams and check the private CAN bus circuit between the image processing control module and the adaptive cruise control module for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary Using the Jaguar Land Rover approved diagnostic equipment, check the image processing module for related Diagnostic Trouble Code(s) and refer to the relevant DTC index
U1A00-87	Private Communication Network - Missing message	Image processing module power or ground circuit open circuit, high resistance Private CAN bus circuit short circuit to ground, short circuit to power, open circuit, high resistance Intelligent emergency braking system fault	Refer to the appropriate system wiring diagrams and check the image processing module power and ground circuits for open circuit, high resistance. Repair the wiring harness as necessary Refer to the appropriate system wiring diagrams and check the private CAN bus circuit between the image processing control module and the adaptive cruise control module for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary Using the Jaguar Land Rover approved diagnostic equipment, check the image processing module for related Diagnostic Trouble Code(s) and refer to the relevant DTC index
U2108-67	Adaptive Cruise Control - Signal incorrect after event	Invalid data received from another control module through the high speed CAN bus (chassis) - Fault in other system	NOTE: DO NOT replace the adaptive cruise control module for this DTC Using the Jaguar Land Rover approved diagnostic equipment, check the snapshot data to determine the invalid data source control module. Check the relevant control module for related Diagnostic Trouble Code(s) and refer to the relevant DTC index Using the Jaguar Land Rover approved diagnostic equipment, reconfigure the adaptive cruise control module with the latest level software Cycle ignition. Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest
U2300-54	Central Configuration - Missing calibration	Car configuration file mismatch with vehicle specification Adaptive cruise control module is not configured correctly	NOTE: DO NOT replace the adaptive cruise control module for this DTC Using the Jaguar Land Rover approved diagnostic equipment, reconfigure the adaptive cruise control module with the latest level software Cycle ignition. Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest Using the Jaguar Land Rover approved diagnostic equipment, check the gateway module for any related Diagnostic Trouble Code(s) and refer to the relevant DTC index
U2300-55	Central Configuration - Not configured	Car configuration file mismatch with vehicle specification Adaptive cruise control module is not configured correctly	NOTE: DO NOT replace the adaptive cruise control module for this DTC Using the Jaguar Land Rover approved diagnostic equipment, reconfigure the adaptive cruise control module with the latest level software Cycle ignition. Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest Using the Jaguar Land Rover approved diagnostic equipment, check the gateway module for any related Diagnostic Trouble Code(s) and refer to the relevant DTC index
U2300-56	Central Configuration - Invalid/incomplete configuration	Car configuration file mismatch with vehicle specification Adaptive cruise control module is not configured correctly	NOTE: DO NOT replace the adaptive cruise control module for this DTC Using the Jaguar Land Rover approved diagnostic equipment, reconfigure the adaptive cruise control module with the latest level software Cycle ignition. Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest Using the Jaguar Land Rover approved diagnostic equipment, check the gateway module for any related Diagnostic Trouble Code(s) and refer to the relevant DTC index
U2300-64	Central Configuration - Signal plausibility failure	Car configuration file mismatch with vehicle specification Adaptive cruise control module is not configured correctly	NOTE: DO NOT replace the adaptive cruise control module for this DTC Using the Jaguar Land Rover approved diagnostic equipment, reconfigure the adaptive cruise control module with the latest level software Cycle ignition. Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest Using the Jaguar Land Rover approved diagnostic equipment, check the gateway module for any related Diagnostic Trouble Code(s) and refer to the relevant DTC index
U3000-19	Control Module - Circuit current above threshold	Battery/charging system fault Over current power supply to the cruise control module Adaptive cruise control module not configured correctly Adaptive cruise control module internal failure	Refer to the relevant article of the repair information and check the battery and charging system. Rectify as necessary Refer to the appropriate system wiring diagrams and check the power supply circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary If the fault persists, using the Jaguar Land Rover approved diagnostic equipment, reconfigure the adaptive cruise control module with the latest level software, clear the Diagnostic Trouble Code(s), cycle ignition and retest If the fault persists, install a new adaptive cruise control module Refer to the relevant article of the repair information and calibrate the adaptive cruise control system
U3000-49	Control Module - Internal electronic failure	Adaptive cruise control module internal failure	Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s), cycle the ignition and retest If the fault persists, install a new adaptive cruise control module Refer to the relevant article of the repair information and calibrate the adaptive cruise control system
U3000-53	Control Module - Deactivated	Adaptive cruise control module internal failure	NOTE: DO NOT replace the adaptive cruise control module for this DTC Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest Using the Jaguar Land Rover approved diagnostic equipment, check the anti-lock braking system for related Diagnostic Trouble Code(s) and refer to the relevant DTC index If the fault persists, using the Jaguar Land Rover approved diagnostic equipment, reconfigure the anti-lock braking system module and adaptive cruise control module with the latest level software, clear the Diagnostic Trouble Code(s), cycle ignition and retest
U3000-63	Control Module - Circuit/component protection time-out	Adaptive cruise control module internal failure	NOTE: DO NOT replace the adaptive cruise control module for this DTC Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest Using the Jaguar Land Rover approved diagnostic equipment, check the anti-lock braking system for related Diagnostic Trouble Code(s) and refer to the relevant DTC index If the fault persists, using the Jaguar Land Rover approved diagnostic equipment, reconfigure the anti-lock braking system module and adaptive cruise control module with the latest level software, clear the Diagnostic Trouble Code(s), cycle ignition and retest
U3000-67	Control Module - Signal incorrect after event	Adaptive cruise control module internal failure	Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s), cycle the ignition and retest If the fault persists, install a new adaptive cruise control module Refer to the relevant article of the repair information and calibrate the adaptive cruise control system
U3000-92	Control Module - Performance or incorrect operation	Adaptive cruise control module internal failure	NOTE: Check to see if this DTC only sets at specific locations, this could be due to environmental factors interfering with the radar signals Allow the system temperature to return to normal. Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest If the fault persists, using the Jaguar Land Rover approved diagnostic equipment, reconfigure the cruise control module with the latest level software, clear the Diagnostic Trouble Code(s), cycle the ignition and retest If the fault persists, contact Jaguar Land Rover technical assistance
U3000-93	Control Module - No operation	Adaptive cruise control module internal failure	NOTE: Check to see if this DTC only sets at specific locations, this could be due to environmental factors interfering with the radar signals Allow the system temperature to return to normal. Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest Using the Jaguar Land Rover approved diagnostic equipment, check the live data signal - Main ECU Voltage Supply (0xD020) If the fault persists, using the Jaguar Land Rover approved diagnostic equipment, reconfigure the cruise control module with the latest level software, clear the Diagnostic Trouble Code(s), cycle the ignition and retest If the fault persists, install a new cruise control module Refer to the relevant article of the repair information and calibrate the cruise control system
U3000-94	Control Module - Unexpected operation	Adaptive cruise control module internal failure	Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s), cycle the ignition and retest If the fault persists, using the Jaguar Land Rover approved diagnostic equipment, reconfigure the adaptive cruise control module with the latest level software, clear the Diagnostic Trouble Code(s), cycle ignition and retest If the fault persists, install a new adaptive cruise control module Refer to the relevant article of the repair information and calibrate the adaptive cruise control system
U3000-98	Control Module - Component or system over temperature	NOTE: The minimum temperature threshold is -40°C. The maximum temperature threshold is 140°C. Adaptive cruise control module internal temperature less than minimum threshold Adaptive cruise control module internal temperature greater than maximum threshold	Allow the system temperature to return to normal. Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and retest Using the Jaguar Land Rover approved diagnostic equipment, check the live data signal - Main ECU Voltage Supply (0xD020) If the fault persists, using the Jaguar Land Rover approved diagnostic equipment, reconfigure the cruise control module with the latest level software, clear the Diagnostic Trouble Code(s), cycle the ignition and retest If the fault persists, install a new cruise control module Refer to the relevant article of the repair information and calibrate the cruise control system
U3006-17	Control Module Input Power "A" - Circuit voltage above threshold	NOTE: This DTC may be induced by boost starting or battery charging Battery/charging system fault Over voltage power supply to the adaptive cruise control module Adaptive cruise control module not configured correctly Adaptive cruise control module internal failure	Refer to the relevant article of the repair information and check the battery and charging system. Rectify as necessary Refer to the appropriate system wiring diagrams and check the power supply circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary If the fault persists, using the Jaguar Land Rover approved diagnostic equipment, reconfigure the cruise control module with the latest level software, clear the Diagnostic Trouble Code(s), cycle the ignition and retest If the fault persists, install a new adaptive cruise control module Refer to the relevant article of the repair information and calibrate the adaptive cruise control system
U3006-19	Control Module Input Power "A" - Circuit current above threshold	NOTE: This DTC may be induced by boost starting or battery charging Adaptive cruise control module power or ground circuit open circuit, high resistance Battery/charging system fault	Refer to the relevant article of the repair information and check the battery and charging system. Rectify as necessary Refer to the appropriate system wiring diagrams and check the power supply circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary If the fault persists, using the Jaguar Land Rover approved diagnostic equipment, reconfigure the cruise control module with the latest level software, clear the Diagnostic Trouble Code(s), cycle the ignition and retest If the fault persists, install a new adaptive cruise control module Refer to the relevant article of the repair information and calibrate the adaptive cruise control system