LR3/Disco 3
DIAGNOSTICS
Car Configuration File
The Car Configuration File (CCF) contains all relevant data about the specification and market condition of the applicable
vehicle, immobilisation codes and driver personal settings. This information is retained in the Central Junction Box (CJB),
the Engine Control Module (ECM) and the instrument cluster enabling each system module to detect which systems and
components are fitted to the vehicle. The information is continuously transferred between the three system modules to
ensure that the data is constantly backed-up between the modules.
When a new instrument cluster is installed, T4 is used to transfer the CCF data from the CJB to the replacement cluster.
Vehicle coding data such as engine type, market etc is retrieved and used to update the replacement instrument cluster.
The CCF will also need to be updated using T4 if the vehicle is modified in service from its original factory specification.
This can include fitting non-standard wheels and/or tyres, optional accessory dealer fit components with an electrical
interface, i.e. park distance control.
7
Alarm LED indicator
Input
8
Park brake - direct drive to indicator
Input
9
Brake pad wear sensors
Input
10
Not used
-
11
Not used
-
12
Fuel tank level sensor 1
Input
13
Fuel tank level sensor ground
Input
14
Ground
Input
15
Power supply - Ignition switch position II
Input
16
Power supply - 12V Permanent
Input
17
Medium Speed CAN + Positive
Input/Output
18
Medium Speed CAN - Negative
Input/Output
19
Low engine coolant level sensor
Input
20
Rear fog lamp active
Input
21
Brake fluid level sensor
Input
22
Trip computer button
Input
23
Not used
Input
24
Front fog lamp active
Input
25
Park brake LED indicator
Input
26
Not used
-
27
Fuel tank level sensor 2
Input
28
Not used
-
29
Not used
-
30
Not used
-
31
Power supply - Ground
Input
32
Power supply - Ground
Input
CAUTION : When a new instrument cluster is to be installed, T4 must be connected to the vehicle and
the instrument cluster renewal procedure followed to replace the cluster. This will ensure that vehicle coding
data is correctly installed in the new instrument cluster. T4 will also record the current service interval data and
restore the settings in the new instrument cluster.