1994 JAGUAR XJ12

Jaguar XJ12 1994 - BUZZERS, RELAYS & TIMERS

Jaguar XJ12 1994 BUZZERS, RELAYS & TIMERS

Component	Component Location
ABS Main Relay	Under left side of dash. See Fig. 1 .
ABS Pump Relay	Under left side of dash. See Fig. 1 .
A/C Clutch Relay	Under right side of dash. See Fig. 1 .
Air Injection Relay	At center of firewall. See Fig. 1 .
Antenna Down Relay	On relay module K.
Antenna Up Relay	On relay module K.
Auxiliary Power Relay	On relay module H.
Auxiliary Side Lights Relay	On relay module H.
Cigar Lighter Relay	On relay module H.
Door Guard Lights Relay	On relay module F.
Door Lock Relay	On relay module G.
Door Unlock Relay	On relay module G.
Front Accessory Relay	Behind radio, on left bracket.
Fuel Injection Main Relay	At right rear of engine compartment. See Fig. 1 .
Fuel Pump Relay 1	At right rear of luggage compartment. See Fig. 1 .
Fuel Pump Relay 2	On relay module L.
Gearshift Solenoid Relay	On relay module M.
Heated Rear Window Relay	On relay module K.
High/Low Power Wash Relay	On relay module D.
High Mount Stoplight Relay	On relay module L.
Horn Relay	On relay module D.
Ignition On Relay	Under center of dash, behind radio. See Fig. 1 .
Interior Lights Relay	On relay module F.
Key Lock Solenoid Relay	On relay module M.
Left Headlight Flash Relay	On relay module L.
Left Seat Heater Relay	On relay module M.
Left Windshield Heater Relay	On relay module F.
Mirror Heaters Relay	On relay module G.
Oxygen Sensor Heater Relay	At right rear of engine compartment. See Fig. 1 .
Rear Accessory Relay	Next to antenna, on bracket.
Right Headlight Flash Relay	On relay module D.
Right Seat Heater Relay	On relay module M.
Right Windshield Heater Relay	On relay module F.
Seat Back Lights Relay	On relay module E.
Security Sounder	At left front of engine compartment.
Side Lights Positive Relay	On relay module H.
Starter Relay	On relay module G.
Trunk Release Relay	On relay module L.
Windshield Washer Relay	On relay module D.
Wiper Motor Relay	On relay module E.
Wiper Slow/Fast Relay	On relay module E.

Jaguar XJ12 1994 - CIRCUIT PROTECTION DEVICES

Jaguar XJ12 1994 CIRCUIT PROTECTION DEVICES

Component	Component Location
Center Fuse Panel	At center console, inside glove box.
Cooling Fans Control Relay Module	At left front inner fender. See Fig. 1 .
Left Fuse Panel	At base of left "A" pillar.
Right Fuse Panel	At base of left "A" pillar.
Relay Module D	At right front of engine compartment. See Fig. 1 .
Relay Module E	At left front of engine compartment. See Fig. 1 .
Relay Module F	Under right side of dash. See Fig. 1 .
Relay Module G	At right kick panel. See Fig. 1 .
Relay Module H	Under center of dash. See Fig. 1 .
Relay Module K	At right front of luggage compartment. See Fig. 1 .
Relay Module L	At right front of luggage compartment. See Fig. 1 .
Relay Module M	Under right side of right front seat. See Fig. 1 .

Jaguar XJ12 1994 - CONTROL UNITS

Jaguar XJ12 1994 CONTROL UNITS

Component	Component Location
ABS Electronic Control Unit	At left front of luggage compartment. See Fig. 2 .
Central Microprocessor	Behind right side of dash. See Fig. 2 .
Climate Control Electronic Control Unit	On right side of evaporator case.
Cruise Control Electronic Control Unit	Behind right side of dash. See Fig. 2 .
Mirrors Electronic Control Unit	Under left front seat. See Fig. 2 .
Fuel Injection Engine Control Module	Under right side of dash. See Fig. 2 .
Fuel Pump Control Module	At right front of luggage compartment. See Fig. 2 .
Ignition Engine Control Module	Under right side of dash. See Fig. 2 .
Intrusion Electronic Control Unit	On floor, in front of left front seat.
Left Front Bulb Failure Unit	At left front of engine compartment. See Fig. 2 .
Left Rear Bulb Failure Unit	At left rear of luggage compartment. See Fig. 2 .
Passenger Seat Control Unit	Under right front seat. See Fig. 2 .
Power Modules (2)	At right side of firewall.
Right Front Bulb Failure Unit	At right front of engine compartment. See Fig. 2 .
Right Rear Bulb Failure Unit	At right rear of luggage compartment. See Fig. 2 .
Suppression Module	At left front of engine compartment.
Security System Electronic Control Unit	At left front of luggage compartment. See Fig. 2 .
Transmission Control Module	At right rear of luggage compartment, above wheelwell. See Fig. 2 .

Jaguar XJ12 1994 - MOTORS

Jaguar XJ12 1994 MOTORS

Component	Component Location
Air Injection Pump	On left side of engine, below air filter assembly.
Antenna Motor Assembly	At right rear of luggage compartment.
Aspirator	At lower right A/C discharge vent.
Fuel Pump A	In fuel tank.
Fuel Pump B	In fuel tank.
Headlight Washer Pump	In headlight washer fluid reservoir.
Left Blower Motor	At left side of firewall.
Lower Servo	At right upper side of evaporator case.
Right Blower Motor	At right side of firewall.
Trunk Release Actuator	In luggage compartment lid.
Upper Servo	At right lower side of evaporator case.
Vacuum Pump & Control Valve	At left front of engine compartment.
Windshield Washer Pump	In washer fluid reservoir.
Wiper Motor	On left side of firewall.

Jaguar XJ12 1994 - SENDING UNITS & SENSORS

Jaguar XJ12 1994 SENDING UNITS & SENSORS

Component	Component Location
Air Temperature Sensor	At left air intake elbow.
Ambient Temperature Sensor	At right front of vehicle.
Barometric Pressure Sensor	At right front of luggage compartment. See Fig. 2 .
Coolant Temperature Sensor	On thermostat housing.
Crankshaft Position Sensor	On front of engine, by crankshaft pulley.
Engine Coolant Level Sensor	On coolant reservoir.
Engine Speed Sensor	At bottom left rear of engine.
Evaporator Temperature Sensor	On right side of evaporator case.
Fuel Level Sensor	In fuel tank.
In-Car Temperature Sensor	At right lower A/C discharge vent.
Inclination Sensor	Above left rear wheelwell.
Left Intrusion Sensor	At top of left "B" pillar.
Lower Feedback Potentiometer	At left lower side of evaporator case.
Oil Pressure Sensor	On left side of engine, below intake manifold.
Ride Height Sensor	Above right rear axle.
Right Intrusion Sensor	At top of right "B" pillar.
Shock Sensor	At left rear wheelwell.
Solar Sensor	At center of dash.
Upper Feedback Potentiometer	At left upper side of evaporator case.
Washer Fluid Level Sensor	On washer fluid reservoir.

Jaguar XJ12 1994 - SOLENOID & SOLENOID VALVES

Jaguar XJ12 1994 SOLENOID & SOLENOID VALVES

Component	Component Location
Air Injection Solenoid Vacuum Valve	Below right throttle body.
Climate Control Solenoid Block	Below left side of evaporator case.
Dump Valve	At left front of engine compartment.
Gear Shift Solenoid	Under center console trim, near gear shift assembly.
Hot Start Vacuum Solenoid Valve	In front of right throttle valve.
Key Lock Solenoid	Above ignition switch.
Main Recirculation Solenoid	Under right side of evaporator case.
Purge Valves	At left front of engine.
Supplementary Air Valves	Below right throttle body.
Solenoid Valve Block	Above right front brake disc air duct.

Jaguar XJ12 1994 - SWITCHES

Jaguar XJ12 1994 SWITCHES

Component	Component Location
Brake Switch	Above brake pedal.
Coolant Temperature Switch	At left heater core, on pipe.
Dual Pressure Cut-Out Switch	At front of engine compartment, on high pressure A/C line.
Hood Switch	Above left headlight.
Idle Switch	On throttle linkage.
Inertia Switch	In upper left side of left front footwell.
Linear Gear Position Switch	At right side of gear shift assembly.
Park Microswitch	On gearshift interlock module.
Radiator Thermal Switch	At lower left of radiator.
Trunk Release Isolation Switch	In luggage compartment lid.
Trunk Release Switch	In glove box.
Trunk Switch	In right luggage compartment hinge.

Jaguar XJ12 1994 - MISCELLANEOUS

Jaguar XJ12 1994 MISCELLANEOUS

Component	Component Location
Diode (LBD2)	Under center console, below radio.
Diode (LSD4)	At left inner kick panel.
Diode (LSD5)	At left inner kick panel.
Diode (LSD6)	At right inner kick panel.
Diode (RSD1)	Behind right headlight, in right front harness.
Diode (VED1)	At front of engine.
Diode (VED2)	At right firewall, under harness pass-through.
Diode (VED3)	At right firewall, under harness pass-through.
RFI Filters	Above fuel tank.
Security Antenna	In rear window glass.
Shorting Plug	In right front footwell, taped to harness by fuel injection electronic control unit.
Strategy Selection Link	In right front footwell, below cruise control electronic control unit.
Transit Isolation Device	On battery.