Actuator JAGUAR XFR 2010 1.G Workshop Manual
[x] Cancel search | Manufacturer: JAGUAR, Model Year: 2010, Model line: XFR, Model: JAGUAR XFR 2010 1.GPages: 3039, PDF Size: 58.49 MB
Page 8 of 3039

Parking Brake Module
Parking Brake Switch
Parking Brake Release Actuator206-06: Hydraulic Brake ActuationSpecificationDescription and OperationComponent Location
Overview
System Operation and Component DescriptionDiagnosis and TestingHydraulic Brake ActuationRemoval and InstallationBrake Fluid Reservoir (70.30.16)
Brake Master Cylinder (70.30.08)206-07: Power Brake ActuationSpecificationDescription and OperationComponent Location
OverviewDiagnosis and TestingPower Brake SystemRemoval and InstallationBrake Booster (70.50.17)
Brake Vacuum Pump - V8 5.0L Petrol/V8 S/C 5.0L Petrol206-09: Anti-Lock Control - Stability AssistSpecificationDescription and OperationComponent Location
Overview
System Operation and Component DescriptionDiagnosis and TestingAnti-Lock Control - Stability AssistRemoval and InstallationAnti-Lock Brake System (ABS) Module (70.60.02)
Front Wheel Speed Sensor
Hydraulic Control Unit (HCU) (70.60.18) (70.60.19)
Rear Wheel Speed Sensor (70.60.04)
Steering Wheel Rotation Sensor
Yaw Rate Sensor and Accelerometer211: Steering System
211-00: Steering System - General InformationSpecification
Page 10 of 3039

211-05: Steering Column Switches
Description and OperationComponent Location
Overview
System Operation and Component DescriptionDiagnosis and TestingSteering Column SwitchesRemoval and InstallationHazard Flasher Switch
Steering Column Multifunction Switch LH
Steering Column Multifunction Switch RH
Steering Column Lock Actuator3: Powertrain
303: Engine
303-00: Engine System - General Information
Diagnosis and TestingEngine - 5.0LGeneral ProceduresBearing Inspection
Camshaft Bearing Journal Diameter
Camshaft End Play
Camshaft Lobe Lift
Camshaft Surface Inspection
Connecting Rod Cleaning
Connecting Rod Large End Bore
Crankshaft End Play
Cylinder Bore Out-of-Round
Exhaust Manifold Cleaning and Inspection
Leakage Test Using Smoke Test Equipment
Piston Inspection
Piston Pin Diameter
Piston Pin to Bore Diameter
Piston Ring End Gap
Piston Ring-to-Groove Clearance
Valve Spring Free Length
Valve Stem Diameter
Cylinder Head Distortion
Cylinder Compression Test - V8 S/C 5.0L Petrol303-01D: Engine - V8 S/C 5.0L PetrolSpecificationDescription and OperationComponent Location
Page 19 of 3039

Blower Motor Control Module
Center Registers
Climate Control Assembly
Climate Control Module
Defrost Vent/Register Blend Door Actuator
Driver Side Register
Evaporator
Floor Console Register
Footwell Vent/Duct Blend Door Actuator
Heater Core
Heater Core and Evaporator Core Housing
Instrument Panel Register Trim Panel
In-Vehicle Temperature Sensor
Passenger Side Register
Pollen Filter
Recirculation Blend Door Actuator
Sunload Sensor
Thermostatic Expansion Valve
Desiccant Bag - V6 3.0L Petrol/V8 5.0L Petrol/V8 S/C 5.0L Petrol412-02: Auxiliary Climate ControlSpecificationDescription and OperationComponent Location
System Operation and Component DescriptionRemoval and InstallationAuxiliary Coolant Flow Pump
Electric Booster Heater412-03: Air ConditioningSpecificationDiagnosis and TestingAir ConditioningRemoval and InstallationAir Conditioning (A/C) Compressor - V8 5.0L Petrol/V8 S/C 5.0L Petrol
Condenser Core - V8 S/C 5.0L Petrol
Pressure Cutoff Switch (82.10.32)413: Instrumentation and Warning Systems
413-01: Instrument ClusterSpecificationDescription and OperationComponent Location
Overview
System Operation and Component Description
Page 28 of 3039

Instrument Panel Console
Instrument Panel Lower Trim Panel
Overhead Console501-14: Handles, Locks, Latches and Entry SystemsSpecificationDescription and OperationComponent Location
Overview
System Operation and Component DescriptionDiagnosis and TestingLocks, Latches and Entry SystemsRemoval and InstallationDoor Lock Cylinder Cover
Exterior Front Door Handle
Exterior Luggage Compartment Lid Release Switch
Exterior Rear Door Handle
Front Door Latch
Front Door Lock Cylinder
Interior Front Door Handle
Luggage Compartment Lid Latch Actuator
Luggage Compartment Lid Lock Cylinder
Rear Door Latch501-16: Wipers and WashersSpecificationDescription and OperationComponent Location
Overview
System Operation and Component DescriptionDiagnosis and TestingWipers and WashersRemoval and InstallationHeadlamp Washer Jet
Headlamp Washer Pump
Rain Sensor
Windshield Washer Reservoir
Windshield Wiper Motor
Windshield Wiper Pivot Arm
Windshield Washer Pump501-17: Roof Opening PanelSpecificationDescription and OperationComponent Location
Page 30 of 3039

System Operation and Component DescriptionDiagnosis and TestingAir Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS)General ProceduresAir Bag DisposalRemoval and InstallationB-Pillar Side Impact Sensor
Clockspring
C-Pillar Side Impact Sensor
Crash Sensor
Driver Air Bag Module
Occupant Classification Sensor
Passenger Air Bag Module
Restraints Control Module (RCM)
Side Air Bag Module (76.73.47)
Side Air Curtain Module501-20C: Pedestrian Protection System
Description and OperationComponent Location
Overview
System Operation and Component DescriptionDiagnosis and TestingPedestrian Protection SystemRemoval and InstallationPedestrian Impact Sensor
Pedestrian Protection Hood Actuator LH
Pedestrian Protection Hood Actuator RH
Pedestrian Protection Module501-25A: Body Repairs - General Information
Description and OperationBody Repairs501-25B: Body Repairs - Corrosion Protection
Description and OperationCorrosion Protection501-25C: Body Repairs - Water Leaks
Description and OperationWater Leaks501-26: Body Repairs - Vehicle Specific Information and Tolerance Checks
Description and OperationBody and Frame501-27: Front End Sheet Metal Repairs
Description and OperationFront End Sheet Metal
Page 114 of 3039

DTC Description Possible Causes Action sensor partial short to
ground
Wiring to height
sensor short to other
cable
Height sensor
electrical fault
Height sensor linkage
bent
Incorrect height
sensor fitted height sensor connector (sensor not connected), with respect
to vehicle body. • Voltage to sensor ground connection should
be ~0v • Voltage to sensor signal connection should be ~0v •
Voltage to sensor supply connection should be ~5v All
voltages should be within ± 0.15v. To check sensor operation
on the vehicle: Check for water ingress around the height
sensors, electrical connectors or shaft end. Check for
excessive movement in the shaft in all directions. Raise
vehicle (ideally on wheels-free ramp) until suspension on
corner under investigation is at rebound to gain access to
height sensor. Access may be improved by removing road
wheel. Carefully disconnect the height sensor link from the
upper suspension arm. Monitor the height sensor signal
voltage output for the height sensor under investigation.
Position the sensor arm so it is in the mid position and
confirm that the voltage is around 2.5 volts. Move the sensor
arm over the range ±40° around the mid position and confirm
that the voltage changes smoothly between around 0.2 volts
and 4.8 volts. If voltages are incorrect or do not change
smoothly then replace sensor. NOTE: For angles of movement
beyond ±40°, the sensor signal will clamp to a voltage of
~0.15v or ~4.85v, depending on position of sensor lever. This
is normal. When investigation is complete, refit height sensor
link to upper arm. If any fixings to the height sensor body or
mounting bracket were slackened or found to be loose or if a
height sensor was changed, the vehicle ride height MUST be
re-calibrated. Refer to the relevant section of the workshop
manual for the calibration procedure C1A06-76
Right Rear
Height Sensor -
Wrong mounting position
Incorrect height
calibration
Refer to the workshop manual and perform the height sensor
calibration procedure. Clear the DTC and retest the system C1A06-78
Right Rear
Height Sensor -
Alignment or
adjustment
incorrect
Incorrect height
calibration
Refer to the workshop manual and perform the height sensor
calibration procedure. Clear the DTC and retest the system C110C-01
Left Front
Damper
Solenoid -
General
electrical failure
Left front damper
solenoid circuit fault
Refer to the electrical circuit diagrams and check Front Left
damper solenoid circuit for faults, If no faults are evident
suspect a faulty control module, refer to the new module
installation note at the top of the DTC Index C110C-18
Left Front
Damper
Solenoid -
Circuit current
below threshold
Front Left Damper
Actuator open circuit
at startup
Refer to the electrical circuit diagrams and check Front Left
Damper Solenoid circuit resistance. Damper solenoid circuit
should lie in range of 2 to 3.5 ohms C110C-19
Left Front
Damper
Solenoid -
Circuit current
above threshold
Front Left Damper
Solenoid circuit
current above
threshold
Refer to the electrical circuit diagrams and check Front Left
Damper Solenoid circuit resistance. Damper solenoid circuit
should lie in range of 2 to 3.5 ohms C110C-14
Left Front
Damper
Solenoid - Short
to ground, open
circuit
Left front damper
solenoid circuit - short
to ground, open circuit
Left front damper
failure
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system. Refer to the
electrical circuit diagrams and check left front damper solenoid
circuit for short to ground, open circuit. Check and install a
new damper as required. Refer to the warranty policy and
procedures manual if a module/component is suspect C110C-1D
Left Front
Damper
Solenoid -
Circuit current
out of range
Left front damper
solenoid circuit - short
to ground/power, open
circuit
Left front damper
failure
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system. Refer to the
electrical circuit diagrams and check left front damper solenoid
circuit for short to ground, power, open circuit. Check and
install a new damper as required. Refer to the warranty policy
and procedures manual if a module/component is suspect C110C-64
Left Front
Damper
Solenoid -
Signal
plausibility
failure
Front Left Damper
Solenoid Measured
Current control loop
failed
Front Left Damper
Solenoid open circuit
Refer to the electrical circuit diagrams and check Front Left
Damper Solenoid circuit resistance. Damper solenoid circuit
should lie in range of 2 to 3.5 ohms
Page 115 of 3039

DTC Description Possible Causes Action C110D-01
Right Front
Damper
Solenoid -
General
electrical failure
Right front damper
solenoid circuit fault
Refer to the electrical circuit diagrams and check Front Right
damper solenoid circuit for faults, If no faults are evident
suspect a faulty control module, refer to the new module
installation note at the top of the DTC Index C110D-18
Right Front
Damper
Solenoid -
Circuit current
below threshold
Front Right Damper
Actuator open circuit
at startup
Refer to the electrical circuit diagrams and check Front Right
Damper Solenoid circuit resistance. Damper solenoid circuit
should lie in range of 2 to 3.5 ohms C110D-19
Right Front
Damper
Solenoid -
Circuit current
above threshold
Front Right Damper
Solenoid circuit
current above
threshold
Refer to the electrical circuit diagrams and check Front Right
Damper Solenoid circuit resistance. Damper solenoid circuit
should lie in range of 2 to 3.5 ohms C110D-14
Right Front
Damper
Solenoid - Short
to ground, open
circuit
Right front damper
solenoid circuit - short
to ground, open circuit
Right front damper
failure
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system. Refer to the
electrical circuit diagrams and check Right front damper
solenoid circuit for short to ground, open circuit. Check and
install a new damper as required. Refer to the warranty policy
and procedures manual if a module/component is suspect C110D-1D
Right Front
Damper
Solenoid -
Circuit current
out of range
Right front damper
solenoid circuit - short
to ground/power, open
circuit
Right front damper
failure
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system. Refer to the
electrical circuit diagrams and check Right front damper
solenoid circuit for short to ground, power, open circuit. Check
and install a new damper as required. Refer to the warranty
policy and procedures manual if a module/component is
suspect C110D-64
Right Front
Damper
Solenoid -
Signal
plausibility
failure
Front Right Damper
Solenoid Measured
Current control loop
failed
Front Right Damper
Solenoid open circuit
Refer to the electrical circuit diagrams and check Front Right
Damper Solenoid circuit resistance. Damper solenoid circuit
should lie in range of 2 to 3.5 ohms C110E-01
Left Rear
Damper
Solenoid -
General
electrical failure
Left Rear damper
solenoid circuit fault
Refer to the electrical circuit diagrams and check Rear Left
damper solenoid circuit for faults, If no faults are evident
suspect a faulty control module, refer to the new module
installation note at the top of the DTC Index C110E-18
Left Rear
Damper
Solenoid -
Circuit current
below threshold
Rear Left Damper
Actuator open circuit
at startup
Refer to the electrical circuit diagrams and check Rear Left
Damper Solenoid circuit resistance. Damper solenoid circuit
should lie in range of 2 to 3.5 ohms C110E-19
Left Rear
Damper
Solenoid -
Circuit current
above threshold
Rear Left Damper
Solenoid circuit
current above
threshold
Refer to the electrical circuit diagrams and check Rear Left
Damper Solenoid circuit resistance. Damper solenoid circuit
should lie in range of 2 to 3.5 ohms C110E-14
Left Rear
Damper
Solenoid - Short
to ground, open
circuit
Left Rear damper
solenoid circuit - short
to ground, open circuit
Left Rear damper
failure
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system. Refer to the
electrical circuit diagrams and check left Rear damper solenoid
circuit for short to ground, open circuit. Check and install a
new damper as required. Refer to the warranty policy and
procedures manual if a module/component is suspect C110E-1D
Left Rear
Damper
Solenoid -
Circuit current
out of range
Left Rear damper
solenoid circuit - short
to ground/power, open
circuit
Left Rear damper
failure
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system. Refer to the
electrical circuit diagrams and check left Rear damper solenoid
circuit for short to ground, power, open circuit. Check and
install a new damper as required. Refer to the warranty policy
and procedures manual if a module/component is suspect C110E-64
Left Rear
Damper
Solenoid -
Signal
Rear Left Damper
Solenoid Measured
Current control loop
Refer to the electrical circuit diagrams and check Rear Left
Damper Solenoid circuit resistance. Damper solenoid circuit
should lie in range of 2 to 3.5 ohms www.JagDocs.com
Page 116 of 3039

DTC Description Possible Causes Action plausibility
failure failed
Rear Left Damper
Solenoid open circuit C110F-01
Right Rear
Damper
Solenoid -
General
Electrical Failure
Right Rear damper
solenoid circuit fault
Refer to the electrical circuit diagrams and check Rear Right
damper solenoid circuit for faults, If no faults are evident
suspect a faulty control module, refer to the new module
installation note at the top of the DTC Index C110F-18
Right Rear
Damper
Solenoid -
Circuit current
below threshold
Rear Right Damper
Actuator open circuit
at startup
Refer to the electrical circuit diagrams and check Rear Right
Damper Solenoid circuit resistance. Damper solenoid circuit
should lie in range of 2 to 3.5 ohms C110F-19
Right Rear
Damper
Solenoid -
Circuit current
above threshold
Rear Right Damper
Solenoid circuit
current above
threshold
Refer to the electrical circuit diagrams and check Rear Right
Damper Solenoid circuit resistance. Damper solenoid circuit
should lie in range of 2 to 3.5 ohms C110F-14
Right Rear
Damper
Solenoid - Short
to ground, open
circuit
Right Rear damper
solenoid circuit - short
to ground, open circuit
Right Rear damper
failure
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system. Refer to the
electrical circuit diagrams and check Right Rear damper
solenoid circuit for short to ground, open circuit. Check and
install a new damper as required. Refer to the warranty policy
and procedures manual if a module/component is suspect C110F-1D
Right Rear
Damper
Solenoid -
Circuit current
out of range
Right Rear damper
solenoid circuit - short
to ground/power, open
circuit
Right Rear damper
failure
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system. Refer to the
electrical circuit diagrams and check Right Rear damper
solenoid circuit for short to ground, power, open circuit. Check
and install a new damper as required. Refer to the warranty
policy and procedures manual if a module/component is
suspect C110F-64
Right Rear
Damper
Solenoid -
Signal
plausibility
failure
Rear Right Damper
Solenoid Measured
Current control loop
failed
Rear Right Damper
Solenoid open circuit
Refer to the electrical circuit diagrams and check Rear Right
Damper Solenoid circuit resistance. Damper solenoid circuit
should lie in range of 2 to 3.5 ohms C1B14-1C
Sensor Supply
Voltage A - Out
of range
Left Front Height
Sensor or Right Front
Height Sensor or Left
Rear Height Sensor or
Right Rear Height
Sensor supply partial
short to other circuit
or ground
Left Front Height
Sensor or Right Front
Height Sensor or Left
Rear Height Sensor or
Right Rear Height
Sensor internal failure
Internal control
module failure
Refer to the electrical circuit diagrams and check sensor
supply for circuit fault. Check all height sensors. Check
module sensor supply output voltage measured voltage
should be between 4.995 volts and 4.85 volts C1B15-1C
Sensor Supply
Voltage B - Out
of range
Left Front Vertical
Acceleration Sensor or
Right Front Vertical
Acceleration Sensor or
Left Rear Vertical
Acceleration Sensor or
Right Rear Vertical
Acceleration Sensor
supply partial short to
other circuit or
ground. Left Front
Vertical Acceleration
Sensor or Right Front
Vertical Acceleration
Refer to the electrical circuit diagrams and check sensor
supply for circuit fault. Check all Vertical Acceleration Sensors.
Check control module sensor supply output voltage Measured
voltage should be between 4.995 volts and 4.85 volts
Page 143 of 3039

DTC Description Possible Causes Action B11F0-11
Air Intake Damper
Position Sensor -
Circuit short to
ground
RECIRC servo motor air
intake feedback and 5
volt supply circuits -
short to ground
Refer to the electrical circuit diagrams and check RECIRC
servo motor air intake feedback and 5 volt supply circuits
for short to ground B11F0-15
Air Intake Damper
Position Sensor -
Circuit short to
battery or open
RECIRC servo motor air
intake feedback and
ground circuits - short
to power, open circuit
Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system. Refer to the electrical circuit diagrams and check RECIRC servo motor air intake feedback and ground circuits for short to power, open circuit B11F8-00
Left Outer Vent -
No sub type
information
Left outer IP vent
actuator internal or
external fault
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system B11F8-49
Left Outer Vent -
Internal electronic
failure
Left outer IP vent
actuator internal
electronic failure
Suspect the left outer IP vent actuator. Check and install a
new actuator as required, refer to the new
module/component installation note at the top of the DTC
Index B11F9-00
Left Inner Vent -
No sub type
information
Left inner IP vent
actuator internal or
external fault
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system B11F9-49
Left Inner Vent -
Internal electronic
failure
Left inner IP vent
actuator internal
electronic failure
Suspect the left inner IP vent actuator. Check and install a
new actuator as required, refer to the new
module/component installation note at the top of the DTC
Index B11FA-00
Right Inner Vent -
No sub type
information
Right inner IP vent
actuator internal or
external fault
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system B11FA-49
Right Inner Vent -
Internal electronic
failure
Right inner IP vent
actuator internal
electronic failure
Suspect the right inner IP vent actuator. Check and install a
new actuator as required, refer to the new
module/component installation note at the top of the DTC
Index B11FB-00
Right Outer Vent -
No sub type
information
Right outer IP vent
actuator internal or
external fault
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system B11FB-49
Right Outer Vent -
Internal electronic
failure
Right outer IP vent
actuator internal
electronic failure
Suspect the right outer IP vent actuator. Check and install a
new actuator as required, refer to the new
module/component installation note at the top of the DTC
Index B11FF-84
A/C Refrigerant
Pressure - Signal
below allowable
range
Signal below allowable
range. A/C System
Refrigerant Pressure
too low
This DTC can be logged by the system due to low ambient
temperature soak (below 3°C) reducing the pressure in the
refrigerant gas system. If the cabin temperature logged
along with the DTC at the time is below 10°C this could
indicate low temperature. If the air conditioning
performance is satisfactory and the in-cabin temperature is
below 10°C then it is likely that the system contains a
suitable amount of gas and the DTC is being recorded as
an effect of the low ambient temperature. If this is not the
case carry out any pinpoint tests associated with this DTC
using the manufacturer approved diagnostic system. Refer
to the electrical circuit diagrams and check air conditioning
pressure sensor circuits for short, open circuit. Check for
correct charge weight B11FF-85
A/C Refrigerant
Pressure - Signal
above allowable
range
Signal above allowable
range. A/C System
Refrigerant pressure
too high
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system. Refer to the
electrical circuit diagrams and check air conditioning
pressure sensor circuits for short, open circuit
Page 149 of 3039

DTC Description Possible Causes Action B1163-15
Left Mirror Heater
Output Short To Power -
Circuit short to battery
or open
Short to power or open circuit
Refer to the electrical circuit diagrams and
test left mirror heater output circuit for short
to power or open circuit B1164-11
Right Mirror Heater
Output Short To Ground
- Circuit short to ground
Short to ground
Refer to the electrical circuit diagrams and
test right mirror heater output circuit for
short to ground B1164-15
Right Mirror Heater
Output Short To Power -
Circuit short to battery
or open
Short to power or open circuit
Refer to the electrical circuit diagrams and
test right mirror heater output circuit for
short to power or open circuit B1165-11
Left Front Puddle Lamp
Output Short To Ground
- Circuit short to ground
Short to ground
Refer to the electrical circuit diagrams and
test left front puddle lamp output circuit for
short to ground B1165-15
Left Front Puddle Lamp
Output Open Load Or
Short To Power - Circuit
short to battery or open
Short to power or open circuit
Refer to the electrical circuit diagrams and
test left front puddle lamp output circuit for
short to power or open circuit B1166-11
Right Front Puddle Lamp
Output Short To Ground
- Circuit short to ground
Short to ground
Refer to the electrical circuit diagrams and
test right front puddle lamp output circuit for
short to ground B1166-15
Right Front Puddle Lamp
Output Open Load Or
Short To Battery - Circuit
short to battery or open
Short to power or open circuit
Refer to the electrical circuit diagrams and
test right front puddle lamp output circuit for
short to power or open circuit B117C-07
Rear Power Window Up -
Mechanical Failures
Set when window is reversed
during window up due to
mechanical problems, window
channel restriction preventing
window closure or Window
mechanism fault
Check for mechanical problems with the
window operation. Check for obstructions in
the window channels and that the glass is
not restricted in the full range of travel B117C-72
Rear Power Window Up -
Actuator stuck open
Door module internal relay
sticking open
Renew the relevant rear door module. Refer
to the warranty policy and procedures
manual if a module is suspect B117C-73
Rear Power Window Up -
Actuator stuck closed
Door module internal relay
sticking closed
Renew the relevant rear door module. Refer
to the warranty policy and procedures
manual if a module is suspect B117C-92
Rear Power Window Up -
Performance or incorrect
operation
Set when auto window up was
interrupted (e.g. by pressing
local switch)
Check the window operation. Clear the DTC
and retest B117D-72
Rear Power Window
Down - Actuator stuck
open
Door module internal relay
sticking open
Renew the relevant rear door module. Refer
to the warranty policy and procedures
manual if a module is suspect B117D-73
Rear Power Window
Down - Actuator stuck
closed
Door module internal relay
sticking closed
Renew the relevant rear door module. Refer
to the warranty policy and procedures
manual if a module is suspect B117E-07 Front Power Window Up
- Mechanical Failures
Set when window is reversed
during window up due to
mechanical problems, window
channel restriction preventing
window closure or Window
mechanism fault
Check for mechanical problems with the
window operation. Check for obstructions in
the window channels and that the glass is
not restricted in the full range of travel