Rear Junction Box (RJB)

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.

DTC	Description	Possible Cause	Action
B100A51	Fuel pump authorization target ID not stored	RJB fault Low speed CAN fault Instrument cluster fault	Check power and ground supplies to RJB. Check CAN communications between RJB and instrument cluster. Check power and ground supplies to instrument cluster
B100A62	Fuel pump authorization signal compare failure	Low speed CAN fault RJB fault Instrument cluster fault Incorrect module installed (RJB/Instrument cluster) Write target SID synchronization error following re-programming Noise/EMC related error	Check CAN communications between RJB and instrument cluster. Check power and ground supplies to RJB and instrument cluster. Confirm correct module installed. Re-synchronize ID by re-configuring the RJB as a new module. Check CAN network for interference/EMC related issues
B100A63	Fuel Pump Authorization Time Out	RJB fault Low speed CAN fault Instrument cluster fault Low battery voltage <9V	Check power and ground supplies to RJB and instrument cluster. Check CAN communications between RJB and instrument cluster. Check battery is in fully charged and serviceable condition, refer to the battery care manual
B102612	Steering column lock ground circuit short to power	Steering column lock ground circuit - short to power	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test steering column lock ground circuit for short to power
B10AF12	Blower fan relay short to power	Blower fan relay circuit - short to power	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test blower fan relay circuit for short to power
B10AF14	Blower fan relay open load or short to ground	Blower fan relay circuit - short to ground, high resistance	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B10DD12	Air bag deployed circuit short to ground	Air bag deployed circuit - short to ground	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test air bag deployed circuit for short to ground
B10DD15	Air bag deployed circuit open circuit, short to power or no signal	Air bag deployed circuit - short to power, high resistance	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B10DD38	Air bag deployed circuit signal out of specification	Signal frequency incorrect	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test air bag deployed circuit between RCM, ECM and RJB for short to power, ground and open circuit
B111211	Parking aid ignition supply short to ground or over temperature	Parking aid ignition supply circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B111213	Parking aid ignition supply open load	Parking aid ignition supply circuit - high resistance	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test parking aid ignition supply circuit for high resistance
B111311	Left front comfort solenoid short to ground or over temperature	Left front comfort solenoid circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B111313	Left front comfort solenoid open load	Left front comfort solenoid circuit - high resistance	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test left front comfort solenoid circuit for high resistance
B111411	Right front comfort solenoid short to ground or over temperature	Right front comfort solenoid circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B111413	Right front comfort solenoid open load	Right front comfort solenoid circuit - high resistance	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test right front comfort solenoid circuit for high resistance
B111511	High mounted stop lamp control short to ground or over temperature	High mounted stop lamp control circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B111513	High mounted stop lamp control open load	High mounted stop lamp control circuit - high resistance	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test high mounted stop lamp control circuit for high resistance
B111611	Left rear lamp assembly control circuit short to ground or over temperature	Left rear lamp assembly control circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B111613	Left rear lamp assembly control circuit open load	Left rear lamp assembly control circuit - high resistance	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test left rear lamp assembly control circuit for high resistance
B111711	Right rear lamp assembly control circuit short to ground or over temperature	Right rear lamp assembly control circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B111713	Right rear lamp assembly control circuit open load	Right rear lamp assembly control circuit - high resistance	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test right rear lamp assembly control circuit for high resistance
B111811	Left rear side marker control circuit short to ground or over temperature	Left rear side marker control circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B111813	Left rear side marker control circuit open load	Left rear side marker control circuit - high resistance	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test left rear side marker control circuit for high resistance
B111911	Right rear side marker control circuit short to ground or over temperature	Right rear side marker control circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B111913	Right rear side marker control circuit open load	Right rear side marker control circuit - high resistance	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test right rear side marker control circuit for high resistance
B111A11	License plate lamps control circuit short to ground or over temperature	License plate lamps control circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B111A13	License plate lamps control circuit open load	License plate lamps control circuit - high resistance	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test license plate lamps control circuit for high resistance
B111D11	Luggage compartment lid open motor control circuit short to ground or over temperature	Luggage compartment lid open motor control circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B111D13	Luggage compartment lid open motor control circuit open load	Luggage compartment lid open motor control circuit - high resistance	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B111E11	Luggage compartment lid lamps power supply circuit short to ground or over temperature	Luggage compartment lid lamps power supply circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B111E13	Luggage compartment lid lamps power supply circuit open load	Luggage compartment lid lamps power supply circuit - high resistance	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test luggage compartment lid lamps power supply circuit for high resistance
B112311	Restraints ignition relay short to ground	Restraints ignition relay circuit - short to ground	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test restraints ignition supply relay circuit for short to ground
B112312	Restraints ignition relay short to power	Restraints ignition relay circuit - short to power	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test restraints ignition supply relay circuit for short to power
B113E23	External luggage compartment lid release switch stuck	Signal stuck low	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A751C	Fuel sender No.1 fault	Fuel sender No.1 circuit - voltage out of range	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A761C	Fuel sender No.2 fault	Fuel sender No.2 circuit - voltage out of range	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A7911	Right fog lamp control circuit short to ground or over temperature	Right fog lamp control circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1A7913	Rear fog lamp control circuit open load	Rear fog lamp control circuit - high resistance	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test rear fog lamp control circuit for high resistance
B1C5512	Horn relay short to power	Horn relay circuit - short to power	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test horn control relay circuit for short to power
B1C5514	Horn relay open load or short to ground	Horn relay circuit - short to ground, high resistance	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1C8312	Heated rear window relay coil short to power	Heated rear window relay circuit - short to power	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test heated rear window relay circuit for short to power
B1C8314	Heated rear window relay coil open load or short to ground	Heated rear window relay circuit - short to ground, high resistance	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1C9111	Fuel filler door lock motor control circuit short to ground or over temperature	Fuel filler door lock motor control circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1C9113	Fuel filler door lock motor control circuit open load	Fuel filler door lock motor control circuit - high resistance	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1D0611	Left turn signal lamp control circuit short to ground or over temperature	Left turn signal lamp control circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1D0613	Left turn signal lamp control circuit open load	Left turn signal lamp control circuit - high resistance	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test left turn signal lamp control circuit for high resistance
B1D0711	Right turn signal lamp control circuit short to ground or over temperature	Right turn signal lamp control circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B1D0713	Right turn signal lamp control circuit open load	Right turn signal lamp control circuit - high resistance	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test right turn signal lamp control circuit for high resistance
B1D3523	Hazard switch stuck	Signal stuck low	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
B2A9016	Battery low	Circuit voltage below threshold	Check battery is in fully charged and serviceable condition, refer to the battery care manual
B2A9116	Battery discharged	Circuit voltage below threshold	Check battery is in fully charged and serviceable condition, refer to the battery care manual
C111A11	Right stoplamp short to ground or over temperature	Right stoplamp control circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
C111A13	Right stoplamp control circuit open load	Right stoplamp control circuit - high resistance	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test right stoplamp control circuit for high resistance
C111B11	Left stoplamp control circuit short to ground or over temperature	Left stoplamp control circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
C111B13	Left stoplamp control circuit open load	Left stoplamp control circuit - high resistance	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test left stoplamp control circuit for high resistance
C112011	Reversing lamp control circuit short to ground or over temperature	Reversing lamp control circuit - short to ground	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
C112013	Reversing lamp control circuit open load	Reversing lamp control circuit - high resistance	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test reversing lamp control circuit for high resistance
P123011	Fuel pump relay short to ground	Fuel pump relay circuit - short to ground	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test fuel pump relay circuit for short to ground
P123012	Fuel pump relay short to power	Fuel pump relay circuit - short to power	Refer to the appropriate SYSTEM WIRING DIAGRAMS and test fuel pump relay circuit for short to power
U001088	Medium Speed CAN Communication Bus	bus off	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
U014000	Lost communication CJB	Lost communication CJB	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
U015500	Lost communication with instrument cluster	Lost communication with instrument cluster	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
U016400	Lost communication with climate control module	Lost communication with climate control module	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
U020600	Lost communication with convertible top module	Lost Communication with HDM	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
U021400	Lost communication with remote keyless entry module	Lost communication with remote keyless entry module	Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
U030046	Internal control module software incompatibility	Calibration parameter failure	Re-configure the RJB using the manufacturer approved diagnostic system. Clear DTC and re-test, if DTC remains, suspect the RJB, refer to the new module installation note at the top of the DTC Index
U1A1449	CAN initialization failure	Internal electronic failure	Install a new RJB, refer to the new module installation note at the top of the DTC Index
U300049	Control module	Internal electronic failure	Install a new RJB, refer to the new module installation note at the top of the DTC Index
U300055	Stored vehicle configuration data does not match	Incorrect car configuration data received	Re-configure the RJB using the manufacturer approved diagnostic system. Clear DTC and re-test. If the DTC remains suspect the RJB, refer to the new module installation note at the top of the DTC Index
U300281	Vehicle Identification Number (VIN)	Vehicle/component mis-match. Corrupt VIN data being transmitted, module previously installed to other vehicle	Install original module, check for DTCs and refer to relevant DTC Index