Land Rover Freelander 2004my Electrical Library Rover Manual

DESCRIPTION AND OPERATION
4.62FREELANDER 04MY
EAT ECU
The EAT ECU monitors the operation of the automatic gearbox via four sensors:
zThe temperature of the automatic transmission fluid (ATF) is measured by the fluid 
temperature sensor. The fluid temperature sensor (C0243) receives a feed from the 
EAT ECU (C0932) on a WK wire. The temperature sensor return (C0243) to the EAT 
ECU (C0932) is via a KB wire. As the temperature of the ATF rises, so the resistance 
of the sensor decreases. The EAT ECU...

DESCRIPTION AND OPERATION
FREELANDER 04MY 4.63
Park
When park is selected, a main relay feed is able to flow from the transmission selector/inhibit 
switch (C0244) to the EAT ECU (C0932) and the selector indicator (C0675) on a KO wire. 
The P symbol on the selector housing will now illuminate.
NOTE: On Canadian specification vehicles, a feed is also provided to the Central Control 
Unit (CCU) (C0593) on a KO wire. This input is used by the CCU to extinguish the daylight 
running lamps.
Reverse
When...

DESCRIPTION AND OPERATION
4.64FREELANDER 04MY
1st Gear
To select first gear, shift solenoid B and shift solenoid C are operated. The EAT ECU 
(C0932) will provide a feed to shift solenoid B (C0243) on an O wire. Shift solenoid C 
(C0243) receives a feed from the EAT ECU (C0932) on an OU wire.
2nd Gear
To select second gear, shift solenoid A and shift solenoid B are operated. The EAT ECU 
(C0932) will provide a feed to shift solenoid A (C0243) on an R wire. Shift solenoid B 
(C0243) receives a feed from...

DESCRIPTION AND OPERATION
FREELANDER 04MY 4.65
Mode Selection
Sport Mode
The selector lever (C0410) is provided a main relay feed via fuse 4 of the engine 
compartment fuse box (C0575) on an NK wire. When the lever is moved across to the S/M 
position, the selector lever (C0410) provides a feed to the EAT ECU (C0932) on an LGK 
wire. The EAT ECU will now enter sport mode. In sport mode, the gearbox still operates as 
a conventional automatic transmission, but the unit becomes more responsive to driver...

DESCRIPTION AND OPERATION
4.66FREELANDER 04MY
Hill Descent Control (HDC) Mode
In HDC mode, the EAT ECU applies engine braking to assist the ABS ECU in controlling the 
vehicles descent. HDC mode is activated if all of the following conditions exist:
zThe gear selector lever is in position 1 or R.
zThe HDC switch is depressed.
zThe throttle pedal is released.
The EAT ECU (C0932) communicates with the ABS ECU (C0501) via the CAN-BUS on YB 
(High) and YN (Low) wires. For more information on the CAN-BUS,...

DESCRIPTION AND OPERATION
FREELANDER 04MY 4.67
Diagnostic Socket
If the EAT ECU detects a failure in an associated component, a fault code will be stored in 
its memory. TestBook or T4 can be used via the diagnostic socket to retrieve these fault 
codes to identify the cause of the failure. The diagnostic socket (C0040) is connected to the 
EAT ECU (C0932) by a K wire. 

DESCRIPTION AND OPERATION
4.68FREELANDER 04MY
ANTI-LOCK BRAKING SYSTEM (ABS)
DESCRIPTION
General
The ABS is a full time, four channel system that gives individual speed control to all four 
wheels to provide the vehicle with anti-lock braking (ABS), Electronic Traction Control 
(ETC), and Hill Descent Control (HDC). The systems are controlled by the ABS ECU, which 
is mounted on the rear of the ABS modulator. The ABS ECU also controls the front to rear 
brake balance by Electronic Braking force...

DESCRIPTION AND OPERATION
FREELANDER 04MY 4.69
Wheel Speed Sensors
The ABS ECU (C0501) supplies a feed to all four wheel speed sensors as follows:
zTo the LH front wheel speed sensor (C0516) on an R wire.
zTo the RH front wheel speed sensor (C0517) on a Y wire.
zTo the LH rear wheel speed sensor (C0502) on a G wire.
zTo the RH rear wheel speed sensor (C0503) on a W wire.
The wheel speed sensors provide the ABS ECU with a square wave form signal. By 
measuring the frequency of the wave form, the ABS ECU...

DESCRIPTION AND OPERATION
4.70FREELANDER 04MY
Brake Pedal Switch
The brake pedal switch is a double contact mechanical switch, mounted at the top of the 
brake pedal adjacent the brake pedal sensor. The switch (C0075) is provided an ignition 
feed from fuse 2 of the passenger compartment fuse box (C0582) on a G wire. When the 
brake pedal is at rest, the switch (C0075) provides a feed to the ABS ECU (C0501) on a GR 
wire. When the brake pedal is pressed, the switch (C0075) informs the ABS ECU (C0501) 
by...

DESCRIPTION AND OPERATION
FREELANDER 04MY 4.71
Hill Descent Control (HDC)
HDC Switch
The HDC switch (C0878) is mounted on the gear lever, and informs the ABS ECU (C0501) 
when HDC has been selected. When HDC is selected, the switch contacts close, and a feed 
is provided to the ABS ECU (C0501) on a PS wire. When the ABS ECU receives this feed, 
it energises the HDC relay.
NOTE: The ABS ECU will only initiate HDC if either 1st or reverse gear are selected, and 
brake temperature doesnt exceed 400 
°C (752...