2010 JAGUAR XFR low oil pressure

Published: 25-Aug-2011
Automatic Transmission/Transaxle - TDV6 3.0L Diesel /V8 5.0L Petrol/V8 S/C 5.0L Petrol - Diagnostics
Diagnosis and Testing

Principle of Operation

For a detailed description of the automatic transmission/transaxle, refer to the relevant Description and Operation section n
the workshop manual. REFER to: (307-01B Automatic Transmission/Transaxle - TDV6 3.0L Diesel /V8 5.0L Petrol/V8 S/C 5.0L
Petrol)

Transmission Description (Description and Operation), Transmission Description (Description and Operation), Transmission Description (Description and Operation).
Fluid Level and Condition Check


CAUTION: The vehicle should not be driven if the fluid level is low as internal failure can result.


NOTE: The transmission fluid temperature must not be allowed to exceed 50°C (122°F) whilst checking level. Should the
temperature rise above this figure, abort the check and allow the transmission fluid to cool to below 30°C (86°F).

This vehicle is not equipped with a fluid level indicator. An incorrect level may affect the transmission operation and could
result in transmission damage. To correctly check and add fluid to the transmission.
REFER to: Transmission Fluid Level Check (307-01B Automatic Transmission/Transaxle - TDV6 3.0L Diesel /V8 5.0L Petrol/V8 S/C 5.0L Petrol, General Procedures).

High Fluid Level

A fluid level that is too high may cause the fluid to become aerated due to the churning action of the rotating internal parts.
This will cause erratic control pressure, foaming, loss of fluid from the vent tube and possible transmission damage. If an
overfill condition is identified, with the engine at idle ensure the fluid temperature is within the specified range and allow the
excess fluid to drain until a small thread of fluid runs from the filler/level plug hole.

Low Fluid Level

A low fluid level could result in poor transmission engagement, slipping, or damage. This could also indicate a leak in one of
the transmission seals or gaskets.
REFER to: Transmission Fluid Level Check (307-01B Automatic Transmission/Transaxle - TDV6 3.0L Diesel /V8 5.0L Petrol/V8 S/C 5.0L Petrol, General Procedures).

Adding Fluid


CAUTION: The use of any other type of transmission fluid other than that specified can result in transmission damage.

If fluid needs to be added, add fluid in 0.50 liter increments through the fill hole Opening. Do not overfill the fluid. For fluid
type, refer to the General Specification chart in this section.
REFER to: Specifications (307-01B Automatic Transmission/Transaxle - TDV6 3.0L Diesel /V8 5.0L Petrol/V8 S/C 5.0L Petrol, Specifications).

Fluid Condition Check

1. Check the fluid level.
REFER to: Transmission Fluid Level Check (307-01B Automatic Transmission/Transaxle - TDV6 3.0L Diesel /V8 5.0L Petrol/V8 S/C 5.0L Petrol, General Procedures).
2. Observe the color and the odor of the fluid. The color under normal circumstances should be Honey.

3. Allow the fluid to drip onto a facial tissue and examine the stain.
4. If evidence of solid material is found, the transmission fluid pan should be removed for further inspection.

NOTE: In the event of a transmission unit replacement for internal failure, the oil cooler and pipes must also be replaced.

Inspection and Verification

1. Verify the customer concern.

2. Visually inspect for obvious signs of damage and system integrity.

DTC Description Possible Cause Action P0781-07
1-2 Shift - Mechanical
Failures
Gear Ratio Monitoring.
Mechanical Failures Check and correct oil level. Clear DTC. If code
re-detects suspect Transmission (Gearbox) internal
fault. Install a new Transmission as required, refer to
the new module/component installation note at the top of the DTC Index P0781-77
2-1 Shift - commanded
position not reachable
Gear Ratio Monitoring.
Mechanical Failures Check and correct oil level. Clear DTC. If code
re-detects suspect Transmission (Gearbox) internal
fault. Install a new Transmission as required, refer to
the new module/component installation note at the top of the DTC Index P0782-07
2-3 Shift - commanded
position not reachable
Gear Ratio Monitoring.
Mechanical Failures Check and correct oil level. Clear DTC. If code
re-detects suspect Transmission (Gearbox) internal
fault. Install a new Transmission as required, refer to
the new module/component installation note at the top of the DTC Index P0782-77
3-2 Shift - commanded
position not reachable
Gear Ratio Monitoring.
Mechanical Failures Check and correct oil level. Clear DTC. If code
re-detects suspect Transmission (Gearbox) internal
fault. Install a new Transmission as required, refer to
the new module/component installation note at the top of the DTC Index P0783-07
3-4 Shift - Mechanical
Failures
Gear Ratio Monitoring.
Mechanical Failures Check and correct oil level. Clear DTC. If code
re-detects suspect Transmission (Gearbox) internal
fault. Install a new Transmission as required, refer to
the new module/component installation note at the top of the DTC Index P0783-77
3-4 Shift - commanded
position not reachable
Gear Ratio Monitoring.
Mechanical Failures Check and correct oil level. Clear DTC. If code
re-detects suspect Transmission (Gearbox) internal
fault. Install a new Transmission as required, refer to
the new module/component installation note at the top of the DTC Index P0784-07
4-5 Shift - Mechanical
Failures
Gear Ratio Monitoring.
Mechanical Failures Check and correct oil level. Clear DTC. If code
re-detects suspect Transmission (Gearbox) internal
fault. Install a new Transmission as required, refer to
the new module/component installation note at the top of the DTC Index P0784-77
4-5 Shift - commanded
position not reachable
Gear Ratio Monitoring.
Mechanical Failures Check and correct oil level. Clear DTC. If code
re-detects suspect Transmission (Gearbox) internal
fault. Install a new Transmission as required, refer to
the new module/component installation note at the top of the DTC Index P0798-1A
Pressure Control Solenoid C
Electrical - Circuit Resistance
Below Threshold
Pressure control solenoid
C Circuit resistance
below threshold Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the
top of the DTC Index P0798-1E
Pressure Control Solenoid C
Electrical - Circuit Short to
Ground
Pressure control solenoid
C electrical circuit short
to ground Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the
top of the DTC Index P0798-21
Pressure Control Solenoid C
Electrical - signal amplitude
< minimum
Pressure Control Solenoid
C Electrical signal
amplitude < minimum Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the
top of the DTC Index P0814-62 Transmission Range Display
Circuit - signal compare
failure
Transmission Range
Display Circuit signal
compare failure Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the
top of the DTC Index P0826-08
Up and Down Switch circuit -
Bus Signal Message Failures
Invalid CAN signal from
BCM/Instrument cluster
Stuck switch
CAN bus circuit fault Check Central junction box and Instrument cluster for
stored DTCs. Check gear change switches for correct
operation. Refer to circuit diagrams and check CAN bus
for a circuit fault P0826-81
Up and Down Switch Circuit -
invalid serial data received
Invalid Can signal from
BCM / Instrument cluster
Stuck switch
CAN Bus Circuit fault Check Central junction box and Instrument cluster for
stored DTCs. Check Gear Change Switches for correct
operation. Refer to Circuit diagrams and check CAN
Bus for Circuit fault P0826-88
Up and Down Switch Circuit -
Bus off
SWM to BCM /
Instrument cluster LIN
Bus failure Check Central junction box and Steering Wheel Ice
Switches for stored DTCs. Refer to Circuit diagrams
and check LIN Bus for Circuit fault

DTC Description Possible Cause Action P0829-07
5-6 Shift - Mechanical
Failures
Gear Ratio Monitoring.
Mechanical Failures Check and correct oil level. Clear DTC. If code
re-detects suspect Transmission internal fault. Install
a new Transmission as required, refer to the new
module/component installation note at the top of the
DTC Index P0829-77
6-5 Shift - Commanded
Position Not Reachable
Gear Ratio Monitoring.
Mechanical Failures Check and correct oil level. Clear DTC. If code
re-detects suspect Transmission internal fault. Install
a new Transmission as required, refer to the new
module/component installation note at the top of the
DTC Index P084F-01
Park / Neutral Switch Input
Circuit - General Electrical
Failure
Wrong voltage level
detected on Park/No Park
signal Check for correct output at Transmission control
module park signal pin (check in all positions) 12 volts
in Park, 0 volts in all other positions. If fault
identified, suspect the Transmission control module.
Install a new Transmission control module as required,
refer to the new module/component installation note
at the top of the DTC Index. If no fault identified,
check Park signal circuit to Transmission Shift Module
for short, open circuit. P0850-01
Park / Neutral Switch Input
Circuit - General Electrical
Failure
General electrical failure Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the top of the DTC Index P0850-02
Park / Neutral Switch Input
Circuit - General signal
failure
General signal failure Check park lock mechanism. If park lock operation is
correct, suspect the transmission control module.
Check and install a new transmission control module
as required. Refer to the warranty policy and
procedures manual, or determine if any prior approval
programme is in operation, prior to the installation of
a new module/component P0850-29
Park / Neutral Switch Input
Circuit - signal invalid
Signal invalid Check park lock mechanism. If park lock operation is
correct, suspect the transmission control module.
Check and install a new transmission control module
as required. Refer to the warranty policy and
procedures manual, or determine if any prior approval
programme is in operation, prior to the installation of
a new module/component P850-1C
Park / Neutral Switch Input
Circuit - circuit voltage out
of range
Circuit voltage out of
range Check park lock mechanism, if park lock operation
correct suspect the Transmission control module.
Install a new Transmission control module as required,
refer to the new module/component installation note
at the top of the DTC Index P0919-93
Gear Shift Position Control
Error - no operation
No shifting despite driver
request Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the top of the DTC Index P0919-94
Gear Shift Position Control
Error - unexpected operation
Shifting without driver
request Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the top of the DTC Index P0938-29
Hydraulic Oil Temperature
Sensor Range/Performance -
signal invalid
Transmission fluid
temperature compared
with module temperature
fault Clear DTC. Carry out cold start road test, continue
driving vehicle until normal operating temperature is
achieved. Read DTCs, if DTC returns, suspect the
Transmission control module. Install a new
Transmission control module as required, refer to the
new module/component installation note at the top of
the DTC Index P0963-12
Pressure Control Solenoid A
Control Circuit High - Circuit
Short to Battery
Pressure control solenoid
1 Circuit Short to Power Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the top of the DTC Index P0964-13
Pressure Control Solenoid B
Control Circuit / Open -
Circuit Open
Pressure Control Solenoid
B Control Circuit Open Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the top of the DTC Index P0964-14
Pressure Control Solenoid B
Control Circuit / Open -
Circuit Short to Ground or
Open
Pressure Control Solenoid
B Control Circuit Short to
Ground or Open Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the
top of the DTC Index P0966-11
Pressure Control Solenoid B
Control Circuit Low - Circuit
Short to Ground
Pressure control solenoid
2 Circuit Short to Ground Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the top of the DTC Index www.JagDocs.com

DTC Description Possible Cause Action P1707-77 Transfer Case Neutral or
Park/Neutral Indication
Circuit - commanded
position not reachable
Commanded position not
reachable Clear the DTC. Test drive the Vehicle, engaging and
disengaging the parking lock several times. If the DTC
recurs, check parking lock components and replace as
required. If no faulty park lock component is found
Clear DTC and the DTC returns suspect the
Transmission control module. Install a new
Transmission control module as required, refer to the
new module/component installation note at the top of
the DTC Index P2700-07 Transmission Friction
Element A Apply Time
Range/Performance -
Mechanical Failures
Gear Ratio Monitoring.
Mechanical Failures Check and correct oil level. Clear DTC. If code
re-detects suspect Transmission (Gearbox) internal
fault. Install a new Transmission as required, refer to
the new module/component installation note at the top of the DTC Index P2701-07 Transmission Friction
Element B Apply Time
Range/Performance -
Mechanical Failures
Gear Ratio Monitoring.
Mechanical Failures Check and correct oil level. Clear DTC. If code
re-detects suspect Transmission (Gearbox) internal
fault. Install a new Transmission as required, refer to
the new module/component installation note at the top of the DTC Index P2702-07 Transmission Friction
Element C Apply Time
Range/Performance -
Mechanical Failures
Gear Ratio Monitoring.
Mechanical Failures Check and correct oil level. Clear DTC. If code
re-detects suspect Transmission (Gearbox) internal
fault. Install a new Transmission as required, refer to
the new module/component installation note at the top of the DTC Index P2703-07 Transmission Friction
Element D Apply Time
Range/Performance -
Mechanical Failures
Gear Ratio Monitoring.
Mechanical Failures Check and correct oil level. Clear DTC. If code
re-detects suspect Transmission (Gearbox) internal
fault. Install a new Transmission as required, refer to
the new module/component installation note at the top of the DTC Index P2704-07 Transmission Friction
Element E Apply Time
Range/Performance -
Mechanical Failures
Gear Ratio Monitoring.
Mechanical Failures Check and correct oil level. Clear DTC. If code
re-detects suspect Transmission (Gearbox) internal
fault. Install a new Transmission as required, refer to
the new module/component installation note at the top of the DTC Index P2713-04 Pressure Control Solenoid D
- System Internal Failures
System internal failures Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the top of the DTC Index P2713-48 Pressure Control Solenoid D
- Supervision Software
Failure
Supervision software
failure Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the top of the DTC Index P2716-22
Pressure Control Solenoid D
Electrical - signal amplitude
> maximum
Pressure Control Solenoid
D Electrical signal
amplitude > maximum Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the
top of the DTC Index P2716-1A
Pressure Control Solenoid D
Electrical - Circuit Resistance
Below Threshold
Pressure control solenoid
D circuit resistance below
threshold Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the
top of the DTC Index P2716-1E
Pressure Control Solenoid D
Electrical - Circuit Resistance
Out Of Range
Pressure control solenoid
D circuit resistance out
of range Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the
top of the DTC Index P2718-14
Pressure Control Solenoid D
Control Circuit / Open -
Circuit Short to Ground or
Open
Pressure control solenoid
D Circuit Short to Ground
or Open Circuit Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the
top of the DTC Index P2720-11
Pressure Control Solenoid D
Control Circuit Low - Circuit
Short to Ground
Pressure control solenoid
D Circuit Short to Ground Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the top of the DTC Index P2721-12
Pressure Control Solenoid D
Control Circuit High - Circuit
Short to Battery
Pressure control solenoid
D Circuit Short to Power Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the top of the DTC Index P2722-04 Pressure Control Solenoid E
- System Internal Failures
Pressure Control Solenoid
E system internal failures Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the top of the DTC Index

1 Magnetic foil 2 Spacer 3 Ceramic surface 4 Magnet 5 Resistance film The film resistors are arranged in a linear arc with resistance ranging from 51.2 to 992.11 Ohms. The electrical output signal is
proportional to the amount of fuel in the tank and the position of the float arm. The measured resistance is processed by the
instrument cluster to implement an anti-slosh function. This monitors the signal and updates the fuel gauge pointer position
at regular intervals, preventing constant pointer movement caused by fuel movement in the tank due to cornering or braking.
A warning lamp is incorporated in the instrument cluster and illuminates when the fuel level is low.

The fuel level sender signal is converted into a CAN message by the instrument cluster as a direct interpretation of the fuel tank contents in liters. The ECM uses the CAN message to store additional OBD (on-board diagnostic) 'P' Codes for misfire detection when the fuel level is below a predetermined capacity.

JET PUMP

The fuel system incorporates two jet pumps. One jet pump is integrated into the fuel pump and draws fuel from the RH side of the fuel tank. The other jet pump is located on the fuel delivery module on the RH side of the tank. There is a pipe that is located in the LH side of the tank that allows fuel to be drawn over from the LH side of the tank, delivering fuel into the swirl pot. The jet pumps operate on a venturi effect created by the fuel at pump output pressure passing through the jet pump. This
draws additional fuel from the LH side of the tank through ports in the jet pump body, delivering additional fuel to the swirl pot.

FUEL VENT VALVE

The fuel level vent valve is located in the upper half of the tank and is connected into a separator which is connected to the
Roll Over Valve (ROV) tank breather. The main purpose of the fuel level vent valve is to control the fill volume of the tank.
During filling, air trapped inside the tank and a small amount of vapor is passed via the fuel level vent valve to the tank
breather. The air and vapor mix then vents to atmosphere through the breather. During filling, when the tank reaches its full
level, the fuel level vent valve closes and prevents air/vapor passing through to the tank breather. The resulting back pressure
causes refueling to stop automatically.

The fuel level vent valve is always open when the fuel tank is below full, providing an unrestricted air/vapor outlet to the tank
breather.
www.JagDocs.com

8. WARNING: Refrigerant must always be recycled before re-use to ensure
that the purity of the refrigerantis high enough for safe use in the air
conditioning system. Recycling should always be carried out with
equipment which is design certified by Underwriter Laboratory Inc. for
compliance with SEA J1991. Other equipment may not recycle refrigerant
to the required level of purity. R143a Refrigerant Recover Recycling
Recharging station must not be used with any other type of
refrigerant.Refrigerant R134a from domestic and comercial sources must
not be used in motor vehicles air conditioning systems.
Allow the system to recover the refrigerant from the system.

9. Close the valves on the refrigerant station.

10. Turn the main switch 'OFF'.

11. Close the valves on the connections.

12. Disconnect the high and low pressure connections.

13. Install the dust covers to the connectors.

14. Open the tap at the rear of the station to drain the refrigerant oil.

15. Measure and record the quantity of refrigerant oil recovered from the
system.

16. Close the tap at the rear of the station.

17. Evacuation.

18. Remove the dust covers from the high and low pressure connections.

19. Connect the high and low pressure lines to the appropriate connections.

20. Open the valves on the connections.

21. Turn the valves on the station to the correct positions.

22. Turn the process switch to the correct position.

23. Turn the main switch to 'ON'.

24. Allow the station to evacuate the A/C system.


25. CAUTION: The system must be evacuated immediatley before
recharging commences. Delay between evacuation and recharging is not
permitted
Recharging

26. Close the valves on the refrigerant station.

27. Close the valve on the oil charger.

28. Disconnect the yellow line from the refrigerant station.

29. Remove the cover from the oil charger.

30. Pour the correct quantity of refrigerant oil into the oil charger.

31. Install the cover to the oil charger.

32. Connect the yellow line to the refrigerant station.

33. Open the valve on the oil charger.

34. Move the pointer on the refrigerant gauge to mark the position of the
refrigerant drop.

35. Slowly open the correct valve on the refrigerant to allow the vacuum to
pull the refrigerant into the system.

36. Close the valve on the refrigerant station when the correct amount of
refrigerant has been drawn into the air conditioning system.

37. Turn the main switch 'OFF'.

38. Close the valves on the connections.

39. Disconnect the high and low pressure connections.

control switch on the integrated control panel or the + and - soft buttons on the touch screen display (TSD). The ATC module also adjusts blower speed to compensate for the ram effect on inlet air produced by forward movement of the vehicle. As
vehicle speed and ram effect increases, blower motor speed is reduced, and vice versa.

Air Distribution Control

Two air distribution doors are used to direct air into the passenger compartment. The doors are operated by stepper motors,
which are controlled by the ATC module using LIN bus messages.
When the A/C system is in automatic mode, the ATC module automatically controls air distribution into the passenger compartment in line with its 'comfort' algorithm. Automatic control is overridden if any of the TSD air distribution soft buttons
are selected. Air distribution in the passenger compartment will remain as selected until the 'Auto' switch is pressed or a
different manual selection is made.

A/C Compressor Control

When A/C is selected the ATC module maintains the evaporator at an operating temperature that varies with the passenger compartment cooling requirements. If the requirement for cooled air decreases, the ATC module raises the evaporator operating temperature by reducing the flow of refrigerant provided by the A/C compressor. The ATC module closely controls the rate of temperature increase to avoid introducing moisture into the passenger compartment.

If the requirement for cooled air increases, the ATC module lowers the evaporator operating temperature by increasing the flow of refrigerant provided by the A/C compressor.
When A/C is off, the compressor current signal supplied by the ATC module holds the A/C compressor solenoid valve in the minimum flow position, effectively switching off the A/C function.
The ATC module incorporates limits for the operating pressure of the refrigerant system. If the system approaches the high pressure limit, the compressor current signal is progressively reduced until the system pressure decreases. If the system falls
below the low pressure limit, the compressor current signal is held at its lowest setting so that the A/C compressor is maintained at its minimum stroke. This avoids depletion of the lubricant from the A/C compressor.
A/C Compressor Torque

The ATC module transmits refrigerant pressure and A/C compressor current values to the ECM (engine control module) over the medium speed then high speed CAN bus, using the CJB as a gateway. The ECM uses these values to calculate the torque being used to drive the A/C compressor. The ECM compares the calculated value with its allowable value and if necessary forces the ATC module to inhibit the A/C compressor by transmitting the 'ACClutchInhibit' CAN message. This forces the ATC module to reduce the drive current to the A/C compressor solenoid valve, which reduces refrigerant flow. This in turn reduces the torque required to drive the A/C compressor.
By reducing the maximum A/C compressor torque, the ECM is able to reduce the load on the engine when it needs to maintain vehicle performance or cooling system integrity.

Cooling Fan Control

The ATC module determines the amount of condenser cooling required from the refrigerant pressure sensor, since there is a direct relationship between the temperature and pressure of the refrigerant. The cooling requirement is broadcast to the ECM on the medium speed CAN bus. The ECM then controls the temperature of the condenser using the cooling fan.
Programmed Defrost

The programmed defrost DEF switch is located on the integrated control panel. When the switch is pressed, the ATC module instigates the programmed defrost function. When selected, the ATC module configures the system as follows:
Automatic mode off.
A/C on. Selected temperature unchanged.
Air inlet set to fresh air.
Air distribution set to windshield.
Blower speed set to level 6.
Windshield heater (where fitted) and rear window heater on.
The programmed defrost function can be cancelled by one of the following:
Selecting any air distribution switch on the TSD.
Pressing the AUTO switch on the integrated control panel.
A second press of the DEF button.
Switching the ignition OFF.
The blower speed can be adjusted without terminating the programmed defrost function.

Rear Window Heater

Rear window heater operation is only enabled when the engine is running. The ATC module controls operation of the rear window heater using a relay in the RJB. When rear window heater operation is required, the ATC module broadcasts a message to the RJB on the medium speed CAN bus. On receipt of the message, the RJB energizes the relay by providing a ground path for the relay coil. This allows a battery feed to flow across the relay to power the rear window heater element.