Jaguar XJ (X350). Manual — part 112

C1891

Left-hand front height

sensor signal circuit

malfunction

•

Sensor signal circuit; short
to B+

•

Sensor failure

For left-hand front height

sensor signal circuit tests,

GO to Pinpoint Test

G256924p20

.

C1893

Left-hand rear height sensor

signal circuit malfunction

•

Sensor signal circuit; open
circuit, short to ground

•

Sensor failure

For left-hand rear height

sensor signal circuit tests,

GO to Pinpoint Test

G256924p21

.

C1895

Left-hand rear height sensor

signal circuit malfunction

•

Sensor signal circuit; short
to B+

•

Sensor failure

For left-hand rear height

sensor signal circuit tests,

GO to Pinpoint Test

G256924p21

.

C1991 Module calibration failure

•

Module calibration failure

Calibrate the control

module using the Jaguar

approved diagnostic

system.

C1993

Pressure sensor signal

circuit malfunction

•

Pressure sensor signal
circuit; open circuit, short
to ground

•

Pressure sensor failure

For pressure sensor signal

circuit tests, GO to

Pinpoint Test

G256924p22

.

C2302 Levelling plausibility error

•

Levelling plausibility error

Carry out mechanical

checks (air leaks, etc).

Refer to the service

bulletins.

C2303 Reservoir plausibility error

•

Reservoir plausibility error

Carry out mechanical

checks (air leaks, etc).

Refer to the service

bulletins.

C2304

Air spring supply circuit

malfunction

•

Air spring supply circuit;
short to ground

For air spring supply

circuit tests, GO to

Pinpoint Test

G256924p23

.

C2305

Air spring supply circuit

malfunction

•

Air spring supply circuit;
short to B+

For air spring supply

circuit tests, GO to

Pinpoint Test

G256924p23

.

C2779

Air spring solenoid

supply/drive circuit

malfunction

•

Air spring solenoid supply
circuit; short to ground,
short to B+

•

Left-hand front air spring
solenoid drive circuit; open
circuit, short to ground,
short to B+

•

Right-hand front air spring
solenoid drive circuit; open
circuit, short to ground,
short to B+

•

Left-hand rear air spring
solenoid drive circuit; open
circuit, short to ground,
short to B+

•

Right-hand rear air spring
solenoid drive circuit; open
circuit, short to ground,
short to B+

For air spring solenoid

supply/drive circuit tests,

GO to Pinpoint Test

G256924p24

.

C2780

Control module in

manufacturer sub-state

•

Control module
programming

Programme the control

module using the Jaguar

approved diagnostic

system.

U1900

CAN communication bus

fault

•

CAN communication error

For CAN circuit tests,

U2516

Air suspension module bus

off

•

CAN communication error

For CAN circuit tests,

U2518 RCCM CAN message missing

•

CAN communication error

For CAN circuit tests,

U2521 ABS CAN message missing

•

CAN communication error

For CAN circuit tests,

U2523 ECM CAN message missing

•

CAN communication error

For CAN circuit tests,

Pinpoint tests

CAUTION: When probing connectors to take measurements in the course of the pinpoint

tests, use the adaptor kit, part number 3548-1358-00.

www.

NOTE:

When performing electrical voltage or resistance tests, always use a digital multimeter (DMM)

accurate to 3 decimal places, and with an up-to-date calibration certificate. When testing

resistance, always take the resistance of the DMM leads into account.

NOTE:

Vehicles built before December 2003 have four suspension height sensors which are mounted

on the front and rear subframe assemblies, two front and two rear. Vehicles built after

December 2003 have only three (the right front sensor being deleted), although the functionality

of the system remains the same. There may be some early vehicles which will have four sensors

fitted, but which have the three-sensor module, making the right front sensor redundant. To

confirm the level of equipment, read the module part number from the special applications

menu in configuration on the Jaguar approved diagnostic system. Part numbers before 'BJ' are

four sensor, while 'BJ' and after are three sensor. If the Jaguar approved diagnostic system is not

available, remove the rear seat and sound deadening and read the part number from the

module.

NOTE:

Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

PINPOINT TEST G256924p1 : CHECK
FOR LEAKS FROM AIR HARNESS

G256924t1 : VISUALLY INSPECT THE AIR HARNESS CONNECTIONS

1. Make sure the system is pressurized, either from the reservoir, or by activating the compressor. 2.

Clean around the area of the suspected leak. 3. Using GOTEC LDS, spray around the air suspension

components until the source of the leak is found.

•

Was a leak found?

-> Yes

REPAIR the leak as necessary. For additional information,

Air Leaks

Test the system for normal operation.

-> No

Recheck system operation. Check for DTCs.

PINPOINT TEST G256924p2 : B1312,
B1471; HEADLAMP CIRCUIT
MALFUNCTION

G256924t2 : CHECK THE HEADLAMP TO ASU PWM SIGNAL CIRCUIT FOR
HIGH RESISTANCE

1. Disconnect the battery negative terminal. 2. Disconnect the ASU electrical connector, CR89. 3.

Disconnect the right-hand headlamp electrical connector, EC06. 4. Disconnect the left-hand

headlamp electrical connector, EC57. 5. Measure the resistance between CR89, pin 03 (Y) and EC06,

pin 02 (Y). 6. Measure the resistance between CR89, pin 03 (Y) and EC57, pin 02 (YB).

•

Is either resistance greater than 5 ohms?

-> Yes

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the

DTC. TEST the system for normal operation.

-> No

GO to Pinpoint Test

G256924t3

.

G256924t3 : CHECK THE HEADLAMP TO ASU PWM SIGNAL CIRCUIT FOR
SHORT TO GROUND

1. Reconnect the battery negative terminal. 2. Measure the resistance between CR89, pin 03 (Y) and

GROUND.

•

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

-> No

GO to Pinpoint Test

G256924t4

.

G256924t4 : CHECK THE HEADLAMP TO ASU PWM SIGNAL CIRCUIT FOR
SHORT TO B+

1. Measure the voltage between CR89, pin 03 (Y) and GROUND.

•

Is the voltage greater than 3 volts?

www.