DTC Index

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 Jaguar XKR, 2009 Jaguar XK8, 2008 Jaguar XKR, 2008 Jaguar XK8, and 2007 Jaguar XKR. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number 3548-1358-00

NOTE: If a module or component is suspect, and the vehicle remains under the Manufacturers warranty, refer to the Warranty Policy and Procedure manual (section B1.2), 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 five digit codes. Match the five digits from the scan tool to the first five digits of the seven digit code listed to identify the fault (the last two 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 a current 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: 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.

DTC	Description	Possible Cause	Action
B1A8481	Car configuration data	RJB reporting invalid data	Re-configure RJB using manufacturer approved diagnostic system and re-test. If DTC remains suspect speed control module. Refer to the new module installation note at the top of DTC Index
C1A6754	Speed control sensor alignment angle - out of range	Speed control sensor out of alignment	Carry out speed control sensor adjustment procedure. See Speed Control Sensor Adjustment .
C1A6781	Speed control sensor - Yaw rate sensor	Yaw rate voltage - out of range	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
C1A6787	Speed control sensor - Missing data	Incorrect or missing data from speed control sensor	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
C1A6796	Speed control sensor - Internal sensor failure	Internal hardware failure	Install a new speed control sensor. See Speed Control Sensor .
C1A6797	Speed control sensor - reduced visibility	Sensor reduced visibility	This DTC will be cleared automatically when environmental conditions allow
C1A6798	Speed control sensor - temperature high	Speed control sensor internal temperature exceeded threshold	This DTC will be cleared automatically when environmental conditions allow
P174E81	ABS wheel speed correlation - active speed output error	Follow speed is mis-calculated to too high a value	Suspect speed control module. Refer to new module installation note at top of DTC Index
U000188	High speed CAN communication Bus	Vehicle CAN Bus off condition	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
U010000	Lost communications with ECM	ECM missing message	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
U010100	Lost communications with TCM	TCM missing message	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
U012100	Lost communication with ABS	ABS missing message	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
U012800	Lost communications with parking brake module	Parking brake missing message	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
U015500	Lost communications with instrument cluster	Instrument cluster missing message	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
U030000	Internal control module software incompatibility	Invalid configuration message is received	Re-configure the RJB using the manufacturer approved diagnostic system. Clear DTCs and re-test. If DTC still logged, suspect speed control module. Refer to new module installation note at top of DTC Index
U030055	Control module software incompatibility - module configuration failure	RJB - at least one of the car configuration parameters is not configured	Re-configure the RJB using the manufacturer approved diagnostic system. Clear DTCs and re-test. If DTC still logged, suspect speed control module. Refer to new module installation note at top of DTC Index
U040100	Invalid data received from ECM - ECM cancel fault	ECM did not respond properly to speed control cancel or auto brake cancel request	Check ECM for DTCs and refer to DTC Index . Refer to Electronic Engine Controls .
U040167	Invalid data received from ECM - ECM resume fault	ECM did not respond properly to speed control resume request	Check ECM for DTCs and refer to DTC Index . Refer to Electronic Engine Controls .
U040181	Invalid data received from ECM - speed control inhibited by ECM	Speed control inhibited by ECM	Check ECM for DTCs and refer to DTC Index . Refer to Electronic Engine Controls .
U041581	Invalid data received from ABS	Stability assist fault	Check ABS module for DTCs and refer to DTC Index . Refer to Anti-Lock Control - Stability Assist .
U041767	Invalid data received from parking brake module - parking brake apply acknowledge	Parking brake module did not respond properly to apply request	Check parking brake module for DTCs and refer to DTC Index . Refer to Parking Brake .
U041781	Invalid data received from parking brake module	Speed control inhibited by parking brake module	Check parking brake module for DTCs and refer to DTC Index . Refer to Parking Brake .
U042200	Invalid data received from CJB	CJB message not up-dated	Check CJB for DTCs and refer to DTC Index . Refer to Communications Network .
U042381	Invalid data received from instrument cluster	Instrument cluster not enabled for adaptive speed control	Check instrument cluster for DTCs and refer to DTC Index . Refer to Instrument Cluster .
U044300	Invalid data received from RJB	RJB message not up-dated	Check RJB for DTCs and refer to DTC Index . Refer to Communications Network .
U1A0088	Private CAN Bus circuit	Private CAN Bus off condition	Refer to appropriate SYSTEM WIRING DIAGRAMS article and test Private CAN Bus circuit between speed control module and speed control sensor for circuit faults
U1A1449	CAN initialization failure	Internal electronic failure	Install a new speed control module, refer to the new module installation note at the top of DTC Index . See Speed Control Module - Vehicles Without: Adaptive Speed Control .
U210100	Control module configuration incompatible	Data sent from RJB is invalid	Re-configure RJB using manufacturer approved diagnostic tool, clear DTC and re-test. If DTC remains check RJB for DTCs and refer to DTC Index . Refer to Communications Network .
U300041	Control module	Internal micro controller error Checksum fault	Install a new speed control module, refer to new module installation note at top of DTC Index
U300042	Control module	Internal RAM test fault	Install a new speed control module, refer to new module installation note at top of DTC Index
U300049	Control module	Internal control module failure	Install a new speed control module, refer to the new module installation note at the top of the DTC Index