Land Rover Range Rover Electrical Library Lm 2nd Edition Rover Manual

DESCRIPTION AND OPERATION
4.36RANGE ROVER
OPERATION
Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fuse 25 and fuse 53 of the 
passenger compartment fuse box (C0632) on an R wire. Fuse 53 (C0583) is connected to 
the ignition switch (C0028) by an RU wire. When the ignition switch is turned to the ignition 
position, current flows across the switch (C0028) to fuse 5 of the passenger compartment 
fuse box (C0585) on a G wire. Fuse 5 (C0587) provides an ignition feed to...

DESCRIPTION AND OPERATION
RANGE ROVER 4.37
Charging
The battery (C0192) provides a permanent feed to the alternator (C0183) on an R wire. Fuse 
5 of the passenger compartment fuse box (C0587) provides an ignition feed to the alternator 
(C0053) on a GW wire. 
When the engine is cranked, the alternator (C0053) supplies the ECM (C0606) a Pulse 
Width Modulated (PWM) signal on a U wire. The ECM uses this PWM signal to calculate the 
electrical load on the alternator, and controls engine idle speed...

DESCRIPTION AND OPERATION
4.38RANGE ROVER
CRUISE CONTROL
DESCRIPTION
General
The cruise control system is enabled by pressing the non-latching master switch located on 
the LH steering wheel switch pack. The system is controlled by the Engine Control Module 
(ECM), which receives commands from the SET+ and RES switches, which are also 
located on the LH steering wheel switch pack. The ECM interprets the messages sent from 
the steering wheel switches and then controls the speed of the vehicle using...

DESCRIPTION AND OPERATION
RANGE ROVER 4.39
Brake Pedal Switch
Fuse 9 of the passenger compartment fuse box (C0586) provides an auxiliary ignition feed 
to the brake pedal switch (C0075) on a PY wire. When the brake pedal is pressed, the switch 
(C0075) provides the ECM (C0331) a voltage of between 6 V and battery voltage on an NS 
wire. When the pedal is released, the switch provides the ECM a voltage of between 
approximately 0 and 2 V. Once the ECM registers the brake pedal has been pressed, it will...

DESCRIPTION AND OPERATION
4.40RANGE ROVER
ELECTRONIC AUTOMATIC TRANSMISSION (EAT) – GM5
DESCRIPTION
General
The GM 5L40-E transmission is an electrically controlled, five speed unit and is mated with 
the Td6 diesel engine. The transmission is controlled by an Electronic Automatic 
Transmission (EAT) ECU which contains software to provide operation as a semi-automatic 
Steptronic transmission. This allows the transmission to be operated as a conventional 
automatic unit by selecting P, R, N, or D on the...

DESCRIPTION AND OPERATION
RANGE ROVER 4.41
ECM Relay
The ECM (C0604) provides an earth path for the ECM relay coil (C1895) on an N wire. The 
energised relay (C1895) provides a feed to fuse 2 of the engine compartment fuse box 
(C0570) on an RW wire. Fuse 2 (C0570) is connected to the EAT ECU (C0932) by a pair of 
RU wires.
For more details on ECM relay operation, refer to the  Engine Management System – Td6  
section of the System Description and Operation Workshop Manual.
EAT ECU
The EAT ECU controls...

DESCRIPTION AND OPERATION
4.42RANGE ROVER
Transmission Temperature Sensor
The temperature of the Automatic Transmission Fluid (ATF) is measured by the Negative 
Temperature Coefficient (NTC) transmission temperature sensor. The EAT ECU (C1835) 
provides a feed to the temperature sensor (C0244) on a BR wire. By measuring the voltage 
returned on a WR wire, the EAT ECU can determine ATF temperature.
Inhibitor Switch
The inhibitor switch is mounted on the LH side of the transmission, and enables the EAT...

DESCRIPTION AND OPERATION
RANGE ROVER 4.43
ELECTRONIC AUTOMATIC TRANSMISSION  (EAT) – ZF
DESCRIPTION
General
The ZF 5HP24 transmission is an electronically controlled, five speed unit and is mated with 
the V8 petrol engine. The transmission is controlled by an Electronic Automatic 
Transmission (EAT) ECU, which contains software to provide operation as a semi-automatic 
Steptronic transmission. This allows the transmission to be operated as a conventional 
automatic unit by selecting P, R, N, or D on...

DESCRIPTION AND OPERATION
4.44RANGE ROVER
When the ignition switch is turned to the ignition position, current flows across the switch 
(C0099) to fuse 5, fuse 33, and fuse 35 of the passenger compartment fuse box (C0585) on 
a G wire. Fuse 5 (C0587) provides an ignition feed to the EAT ECU (C1835) on a GW wire. 
Fuse 33 (C0587) provides an ignition feed to the transfer box ECU (C1319) on a GP wire. 
Fuse 35 (C0587) provides an ignition feed to the Hill Descent Control (HDC) switch (C0365) 
on a GBY...

DESCRIPTION AND OPERATION
RANGE ROVER 4.45
Shift Interlock Solenoid
To lock the selector lever assembly, the EAT ECU (C0193) provides a feed to the shift 
interlock solenoid (C0673) on a BP wire. An earth path is provided by the EAT ECU (C0193) 
on an NP wire.
Steptronic
When manual (Steptronic) mode is selected, the EAT ECU selects gears according to inputs 
received from the Steptronic switch. The EAT ECU (C0193) provides two feeds to the 
Steptronic switch (C1664); one on a UY wire, one on a US wire....