Land Rover Discovery Ii Valeo Bcu Ecu Manual

 
 
 
The heart of the Discovery series 2 The Valeo BCU has been custom produced for this application and 
takes care of nearly everything not catered for by independent systems. There are actually different 
versions with slightly different capabilities and functionality, however this is handled totally 
transparently and cleverly with capability that has been built in that allows settings to be crossed from 
one ECU version to another. 
 
 
 
 
Vehicle makes models and variants known or believed to be...

 
Real time live display of the information the electronic control unit of the selected vehicle 
system is currently deriving from its input sensors. 
BODY 1 
 
LIGHTS 
 Sidelights: The sidelights input are used by the BCU to give, amongst other things a 
lights left on warning sound. 
 Main beam: When the lighting switch is moved to the flash or main position, the feed 
from fusible link 10 in the engine compartment fuse box passes through the switch 
contacts. The feed is connected to the passenger...

has been made. The BCU then sends a signal to the IDM in the passenger compartment 
fuse box. The signal is received by the IDM and interpreted as a request for hazard 
warning lamp operation. The IDM grants an earth path for the coils of the LH and RH 
direction indicator relays. The IDM controls the flasher operation by momentarily 
removing and restoring the earth for the relay coils, which opens and closes the contacts 
causing the indicator bulbs to flash on and off. The resistor is used by the IDM...

 Transfer box neutral: This is the supply voltage as measured by the BCU at its 
transistor switching circuit stages located within the BCU itself. 
 Park/neutral: 
BODY 2 
TRANSMISSION 
 Reverse idle: The status of the reverse switch input. When reverse gear is selected, a feed 
from fuse 25 in the passenger compartment fuse box is connected on a GY wire to the 
reverse lamp switch (manual transmission) or the starter inhibitor/reverse lamp switch 
(automatic transmission). 
 Transfer neutral...

 Front wash: When the switch stalk is pulled, a feed passes through the washer switch 
contacts and is connected, from the switch, to the washer pump and the BCU. If  the 
washer switch is held for longer than 0.4 seconds the BCU signals the IDM through 
the serial data bus to energies the front wiper relay. The IDM energizes the front 
wiper relay for 4 seconds allowing the screen to be cleared. After 4 seconds the IDM 
removes the earth path for the relay coil, causing the wipers to return to the park...

 Seat belt: The seat belt switch is connected to the BCU on a RW wire. The seat belt 
switch is earthed on a B wire. 
 Diff lock: When the differential lock unit switch is operated, an earth path is completed 
from the SLABS ECU to the differential lock unit switch. 
 Transfer neutral: The status of the Transfer in neutral input to the BCU. The 
transmission neutral sensor provides an earth signal to the BCU when the transfer box is 
in neutral. The earth signal causes the BCU to operate an audible...

 Check ACE: The ACE warning lamp is connected from the instrument pack to the ACE 
ECU. 
 Check HDC: The hill descent fail warning lamp is connected from the instrument pack 
to the SLABS ECU. 
 Check SLS: The SLS warning lamp is connected from the instrument pack to the SLABS 
ECU. The drivers door closed input is enabled by the SLABS ECU to illuminate the SLS 
warning lamp in some remote control operating modes. 
 Instr. mileage (km): This is an input which is internal to the instrument pack. 
...

 
LIGHTS WINDOWS - SEATS 
 Front fog lamp: The options are: 
 The vehicle is not fitted with front fog lamps (NONE). 
 The front fog lamps operate when the headlamps are dipped or are on main beam 
(MAIN). 
 The front fog lamps will not operate if the headlamps are on main beam (NO MAIN). 
 Daytime run lights: Legislation in some markets requires that the headlamps illuminate   
whilst the vehicle is moving, or the ignition is switched on. This function is referred to as 
daylight running lamps....

 
 Heated front screen: Sets whether the Heated Front screen is Fitted or Not Fitted 
 Electric front seats: This setting is used to configure the operation of the electric front 
seats available options are: 
 The vehicle is not fitted with electric front seats (NOT FITTED). 
 The electric seats are available if the ignition is on or the driver door is opened for a 
short time (FITTED). 
 The electric seats are available if the ignition is on (IGNITION II). 
 Programmed wash wipe: The front wash...

 
 Autographics: The BCU can be programmed to change the situations in which the 
automatic gearbox selector leaver illumination (AUTOGRAPHICS) is enabled. The 
automatic gearbox selector illumination can be on whenever the ignition is on (ALWAYS 
option) or it can be on when the ignition is on and the sidelights are on (SIDELIGHTS 
option). 
TRANSM-LOCK-WARN 
 
 Transmission: Configure the BCU for either Automatic or Manual. 
 Shift interlock: Certain market legislations require that an vehicle must...