Page 537 of 3039

bus allows the DLM to communicate with other systems on the vehicle.
A certain amount of differential slip is required to allow the vehicle to turn corners and to remain stable under control of the
ABS. The ADM monitors the driver's demands through primary vehicle controls and automatically sets the slip torque in the differential. The system is completely automatic and does not require any special driver input.
The differential strategy in the ADM includes:
A pre-loading function, increasing locking torque with increased driving torque.
A slip controller to decrease locking torque for optimum comfort, e.g. parking.
The ADM memorizes the position of the motor when the ignition is switched off.
CAN bus messages used by the ADM include wheel speed, steering angle, automatic transmission speed, temperature information, car configuration, axle ratios and mode inputs.
The ADM also sends messages via the CAN bus to tell other control modules on the network the status of the electronic differential. The clutch torque and default mode status are some of the main signals sent out by the ADM.
If the DLM or ADM are replaced, a Jaguar approved diagnostic system must be connected to the vehicle and the differential
self-calibration procedure must be performed. This procedure must also be performed if the motor or electronic differential is
replaced.
If a fault occurs with the electronic differential, the ADM, the DLM, or one of the required input signals, the ADM records an
error code and displays a warning in the message center.
The following messages can be displayed:
Message Description Chime E-DIFF NOT
AVAILABLE Differential temperature has reached the overheat threshold. System deactivated until temperature
returns within limits. Single E-DIFF FAULT Fault has occurred with electronic differential. System deactivated until fault rectified. Single
Page 538 of 3039

Rear Drive Axle/Differential - Rear Drive Axle and Differential
Diagnosis and Testing
Principle of Operation Published: 12-May-2014
For a detailed description of the Rear Drive Axle and Differential, refer to the relevant Description and Operation section in the
workshop manual. REFER to: Rear Drive Axle and Differential (205-02 Rear Drive Axle/Differential, Description and Operation).
Inspection and Verification
CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not
guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle.
1. Verify the customer concern.
2. Visually inspect for obvious signs of damage and system integrity.
Mechanical Electrical
Fixings that secure Rear Differential Control Module (Heat path
for Module Heatsink)
Fuses/Relays
Damaged, Loose or Corroded Connector(s)
Damage to Wiring Loom/Incorrect Location,
Stretched or Taught
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to
the next step.
4. If the cause is not visually evident, check the system for any logged Diagnostic Trouble Codes (DTCs) and refer to the
DTC index.
DTC Index
For a list of diagnostic trouble codes that could be logged on this vehicle, please refer to Section 100-00. REFER to: Diagnostic Trouble Code (DTC) Index - DTC: Rear Differential Control Module (RDCM) (100-00 General Information, Description and Operation).
Page 539 of 3039
Rear Drive Axle/Differential - Differential Draining and Filling
General Procedures
Check Published: 11-May-2011
NOTE: Some variation in the illustrations may occur, but the essential information is always correct.
1. Refer to: Specifications - TDV6 3.0L Diesel /V8 5.0L Petrol/V8 S/C 5.0L Petrol (205-02 Rear Drive Axle/Differential, Specifications).
2. WARNING: Make sure to support the vehicle with axle stands.
Raise and support the vehicle.
3.
Clean the area around the lubricant filler plug.
Position container to collect fluid loss.
4.
Clean the area around the drain plug.
Remove the fluid drain plug.
Drain the differential lubricant. www.JagDocs.com
Page 540 of 3039
Adjustment
1.
Clean the drain plug.
Torque: 27 Nm
2. CAUTIONS:
Do not fill the differential with lubricant up to the
filler plug. The filler plug is only used to fill the differential
with lubricant, and not to act as a level indicator.
Make sure the correct specification and quanity of oil
is used.
Fill the differential with the correct amount of
lubricant.
Page 541 of 3039
Page 542 of 3039
Published: 11-May-2011
Rear Drive Axle/Differential - Differential Case TDV6 3.0L Diesel /V8 5.0L
Petrol/V8 S/C 5.0L Petrol
Removal and Installation
Removal
All vehicles
1. WARNING: Do not work on or under a vehicle supported only by a
jack. Always support the vehicle on safety stands.
Raise and support the vehicle.
2. Refer to: Rear Halfshaft - TDV6 3.0L Diesel /V8 5.0L Petrol/V8 S/C 5.0L Petrol (205-05 Rear Drive Halfshafts, Removal and Installation).
3. Refer to: Exhaust System (309-00C Exhaust System - V8 5.0L Petrol/V8 S/C 5.0L Petrol, Removal and Installation).
4. CAUTIONS:
Do not use the 5mm hole on the differential case
flange for the alignment mark.
Make sure that the driveshaft is supported with
suitable retaining straps.
NOTE: Using the 3mm hole on the differential case
flange, paint an alignment mark (as indicated) to aid
correct installation of the driveshaft to the differential case. 205-932
Remover, Driveshaft Special Tool(s)
Page 543 of 3039
5. NOTES:
On vehicles with diesel engine, note the illustrated
orientation of the special tool.
Make sure that the special tool is correctly installed to
the recess on the driveshaft.
Special Tool(s): 205-932
6. CAUTION: Care must be taken not to damage the
surrounding components when using the special tool.
NOTE: Using a suitable hammer and drift, make sure
that you only hit the corner edges of the special tool to
remove the driveshaft.
Special Tool(s): 205-932 www.JagDocs.com
Page 544 of 3039