Freelander System Description and Operation
AUTOMATIC GEARBOX - JATCO
44-36
DESCRIPTION AND OPERATION
Main Relay
The main relay is located in the engine compartment fusebox and supplies battery voltage to the EAT ECU, in addition
to other vehicle components. The main relay is energised by the ECM when the ignition is switched on.
When the ignition is switched off, the ECM will maintain the main relay in an energised state for several minutes. This
allows for cooling fan operation to continue after the engine has been switched off and allows other vehicle ECU's to
remain active. The EAT ECU remains active for a short period after the ignition is switched off to allow EEPROM fault
code data to be stored.
In the event of a main relay failure, any of the following symptoms may be observed:
l
The gearbox will be locked in 4th gear (limp home mode)
l
No CAN communications will be available.
38
Earth
Input
39
Fluid temperature sensor
Input
40
Not used
-
41
Sport / Manual hold switch
Input
42
Not used
-
43
Brake switch signal
Input
44
Not used
-
45
Selector 4th range switch
Input
46
Not used
-
47
Not used
-
48
Shift lock solenoid fault
Input
49
Cruise control engaged signal
Input
50
Shift lock solenoid earth
Input
51
Not used
-
52
Shift solenoid valve C
Output
53
Low clutch timing solenoid valve
Output
54
12V battery voltage from main relay
Input
Pin No.
Description
Input/Output