Jaguar X-Type Sedan and Estate (Wagon). Manual - part 97

1
2

1
2
3

Measure the resistance between JB89, pin 03 (GB) and JB185, pin 42 (GB).

Is the resistance greater than 5 ohms?
Yes

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams, test the system for normal
operation.

REPAIR the circuit between the brake pressure sensor and battery. This circuit includes the primary distribution box
(fuse 96), the ignition switch and the DSC control module. For additional information, refer to the wiring diagrams.

G3: CHECK THE GROUND TO THE BRAKE PRESSURE SENSOR

Turn the ignition switch to the OFF position.
Measure the resistance between JB89, pin 01 (B) and GROUND.

Is the resistance greater than 5 ohms?
Yes

GO to G4

GO to G5

G4: CHECK THE BRAKE PRESSURE SENSOR GROUND CIRCUIT FOR HIGH RESISTANCE

Disconnect the DSC module electrical connector, JB185.
Measure the resistance between JB89, pin 01 (B) and JB185, pin 25 (B).

Is the resistance greater than 5 ohms?
Yes

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams, test the system for normal
operation.

Please check part is not on any form of prior authorisation before replacement.

G5: CHECK THE BRAKE PRESSURE SENSOR SENSOR CIRCUIT FOR HIGH RESISTANCE

Disconnect the DSC module electrical connector, JB185.
Measure the resistance between JB89, pin 02 (W G) and JB185, pin 26 (W G).

Is the resistance greater than 5 ohms?
Yes

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams, test the system for normal
operation.

Check the brake light switch circuit. Please check part is not on any form of prior authorisation before replacement.

PINPOINT TEST H : CHECK THE BRAKE LIGHT SWITCH CIRCUIT

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

H1: CHECK THE POWER SUPPLY TO THE BRAKE LIGHT SWITCH

Disconnect the brake light switch electrical connector, PA03.
Turn the ignition switch to the ON position.
Measure the voltage between PA03, pin 03 (NR) and GROUND.

Is the voltage less than 10 volts?
Yes

REPAIR the circuit between the brake light switch and battery. This circuit includes the central junction box (fuse 90),
and the ignition switch. For additional information, refer to the wiring diagrams, test the system for normal operation.

GO to H2

H2: CHECK THE CIRCUIT BETWEEN THE BRAKE LIGHT SWITCH AND THE ABS/DSC MODULE FOR HIGH RESISTANCE

Turn the ignition switch to the OFF position.
Disconnect the ABS/DSC module electrical connector, JB45/JB185.
Measure the resistance between PA03, pin 03 (NR) and JB45/JB185, pin 32 (GO).

Is the resistance greater than 5 ohms?
Yes

REPAIR the high resistance circuit. This circuit includes the central junction box. For additional information, refer to
the wiring diagrams, test the system for normal operation.

GO to H3

H3: CHECK THE CIRCUIT BETWEEN THE BRAKE LIGHT SWITCH AND THE ABS/DSC MODULE FOR SHORT CIRCUIT TO BATTERY

Measure the voltage between PA03, pin 03 (NR) and GROUND.

Is the voltage greater than 3 volts?
Yes

REPAIR the short circuit. This circuit includes the central junction box. For additional information, refer to the wiring
diagrams, test the system for normal operation.

GO to H4

H4: CHECK THE FUNCTION OF THE BRAKE LIGHT SWITCH

Connect an ohmmeter across pins 01 and 03 of the brake light switch.
Operate the brake pedal.
Measure the resistance across the switch as the pedal is operated up and down.

Does the resistance switch between open and closed circuit as the pedal is operated?
Yes

Please check part is not on any form of prior authorisation before replacement.

INSTALL a new brake light switch. TEST the system for normal operation.

PINPOINT TEST I : PUMP MOTOR AND SOLENOIDS POWER OR GROUND CIRCUIT FAULT

• NOTE: Before beginning this test, check if the pump motor is running constantly. If the pump motor does run constantly, suspect an
ABS/DSC module fault.

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

I1: CHECK THE POWER SUPPLY TO THE PUMP MOTOR AND SOLENOIDS

Make sure the ignition switch is in the OFF position.
Disconnect the ABS/DSC control module electrical connector, JB45/JB185.
Measure the voltage between JB45/JB185, pin 02 (R) and GROUND.

1
2

Measure the voltage between JB45/JB185, pin 06 (R) and GROUND.

Is either voltage less than 10 volts?
Yes

REPAIR the circuit between the ABS/DSC module and battery. This circuit includes the battery junction box (fuse 03)
and harness splice, JBS27. For additional information, refer to the wiring diagrams.

GO to I2

I2: CHECK THE GROUND TO THE ABS/DSC MODULE

Measure the resistance between JB45/JB185, pin 01 (B) and GROUND.
Measure the resistance between JB45/JB185, pin 05 (B) and GROUND.

Is either resistance greater than 5 ohms?
Yes

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

RECHECK the DTCs. Please check part is not on any form of prior authorisation before replacement.

Published: 11-May-2011

Anti-Lock Control - Stability Assist - Anti-Lock Control - Stability AssistVIN Range:
J12992->V99999

Diagnosis and Testing

Principles of Operation

For a detailed description of the Anti-Lock Control - Stability Assist systems, refer to the relevant Description and Operation sections in the
workshop manual. REFER to:

Anti-Lock Control - Stability Assist

(206-09 Anti-Lock Control - Stability Assist, Description and Operation).

Inspection and Verification

• NOTE: An intermittent fault may allow the warning light to go off. This does not necessarily mean the fault is not present. Some warnings
will appear to clear when the ignition is cycled. This is often because the warning has flagged as a result of one of the vehicle's on-board
diagnostic routines having run to detect the fault. If the same routine is not run when the ignition is switched ON, the warning will not
reflag until the routine does run.

1. Verify the customer concern.

2. Visually inspect for obvious signs of mechanical or electrical damage.

Visual inspection

Mechanical

Electrical

Check the tire sizes, condition, and inflation
Brake fluid level or leakage
W heel speed sensor fitment
W heel speed sensor air gap
W heel speed sensor toothed wheels (missing teeth/contamination)
W heel bearings

W arning light operation
Fuses
Anti-lock Brake System (ABS)
Traction Control System (TCS)
Dynamic Stability Control (DSC)
Hydraulic Control Unit (HCU)
Steering wheel rotation sensor
W heel Speed Sensors (W SS)
W heel speed sensor link leads
Connectors/terminals
Harnesses
Grounds

3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step

DTC index

CAUTION: W hen probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number

3548-1358-00.

• NOTE: If the control module/HCU is suspect and the vehicle remains under manufacturer warranty, refer to the Warranty Policy and
Procedures manual (section B1.2), or determine if any prior approval programme is in operation, prior to the installation of a new
module/HCU.

• 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 additional information read by the manufacturer
approved diagnostic system).

• NOTE: When performing electrical voltage or resistance tests, always use a digital multimeter (DMM) accurate to three decimal places,
and with an up-to-date 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: Inspect connectors for signs of water ingress, and pins for damage and/or corrosion.

• 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

C006308 Yaw Rate Sensor

Bus signal / message
failures which cannot
be assigned to a
specific signal or
message
Yaw rate sensor signal
is in a valid range but
is implausible
Yaw rate sensor not
correctly mounted
Yaw rate sensor not
correctly connected
Ignition supply to yaw
rate sensor open
circuit, short to power,
short to ground
Ground line to yaw
rate sensor open
circuit, short to power,
short to ground
Yaw rate sensor
internal failure

Check yaw rate sensor for correct mounting. Check yaw rate sensor connector for
corrosion and correct installation. Refer to the electrical guides and check yaw rate
supply, ground circuits for short to ground, power and open circuit. Install yaw rate
sensor as required. Road test vehicle to ensure DSC lamp is extinguished.

DTC

Description

Possible cause

Action

C007298 Brake

Temperature Too
High

Component or system
over temperature. The
HCU has detected that
the temperature is too
high for the correct
operation of
component or system
Overheating of at
least one hydraulic
braking circuit

Check brake system for binding, dragging brakes.

C110964 Vehicle Dynamics

Control Switch

Signal plausibility
failure. The HCU has
detected a plausibility
failure
Traction switch has
been operated to
frequently, greater
than 15 times within
30 seconds
Traction switch has
been operated for too
long
Traction switch is
stuck closed
Traction off circuit
short to ground
Damage or corrosion
to traction off circuit
wiring or connectors

Verify with customer that switch has not been depressed for greater than 10
seconds or repeatedly pressed. Using the manufacturer approved diagnostic
system check datalogger signal 2B05 electronic traction control / dynamic stability
control input/output, for sticking switch. Refer to the electrical guides and check
traction off circuit for short to ground. Check for damage or corrosion to traction
off circuit wiring and connectors. Install traction switch as required.

C1A0000 Control Module

Internal failure control
module

Clear DTCs using the manufacturer approved diagnostic system, confirm fault is
still present. Suspect the HCU, check and install a new unit as required, refer to
the new module/component installation note at the top of the DTC Index. After
replacement the new HCU must be configured, by carrying out the following
procedure. Ignition ON for 30 seconds, brake warning lamps will remain
illuminated. Ignition OFF. Ignition ON, brake warning lamps will extinguish after 3
seconds.

C1A0001 Electronic Control

Unit

General Electrical
Failure
Implausible HCU valve
actuation
Internal failure

C1A0016 System Voltage

Low

Circuit voltage below
threshold. The HCU
has measured a
voltage below a
specified range but
not necessarily a short
to ground
HCU supply voltage
less than 9.3 volts,
pump running or less
than 9.6 volts, pump
not running
Low or discharged
battery
Ground circuit to
module high
resistance, poor
connection, corroded
terminals
Motor ground circuit to
module high
resistance, poor
connection, corroded
terminals
Ignition circuit to
module intermittent
open circuit, poor
connection, corroded
terminals
Pump supply circuit to
module intermittent
open circuit, poor
connection, corroded
terminals
Solenoid supply circuit
to module intermittent
open circuit, poor
connection, corroded
terminals

Check vehicle battery is at correct voltage and is not low or discharged. Check
vehicle charging system is correctly charging the battery. Refer to the electrical
guides and check ground circuit to module for high resistance, poor connection,
corroded terminals. Motor ground circuit to module for high resistance, poor
connection, corroded terminals. Ignition circuit to module intermittent for open
circuit, poor connection, corroded terminals. Pump supply circuit to module for
intermittent open circuit, poor connection, corroded terminals. Solenoid supply
circuit to module for intermittent open circuit, poor connection, corroded terminals.

C1A0017 System Voltage

High

Circuit voltage above
threshold. The HCU
has measured a
voltage above a
specified range but
not necessarily a short

Using the manufacturer approved diagnostic system check other control modules
for similar DTCs. Check vehicle battery is at correct voltage and is not above or
overcharged condition. Check vehicle charging system is correctly charging the
battery.

Content .. 95 96 97 98 ..