Functions and parameters
Functions
Publication No. Date Valid from serial number T-code
261828-040 2008-08-21 6051502 815, 816
© BT Repair Manual RRE140/160/180/200/250 4 – 43
4.8 Functions
4.8.1 General overview
Key
[ ] = reference to electrical component in the wiring diagram.
{high} = refers to a voltage level of around 48 V.
{low} = refers to a voltage level of around 0 V.
Components
ACT = Traction transistor regulator [T1] (AC Traction)
ACH = Lift transistor regulator [T2] (AC Hydraulic)
CAN = Communication network (Controller Area Network)
CID = Central display [A1] (Central Information Display)
EPS = Steering servo [A2] (Electronic Power Steering)
ESD = Static discharge (Electrostatic Discharge)
GFU = Universal unit (General Function Unit) [A8]
LID = Upper display [P6] (Load Information Display) (option)
MCU = Main processor [A5] (Main Control Unit)
All these components intercommunicate via two CAN buses with the
MCU connected to each. The CID and LID use the first CAN bus and
the EPS, ACT and ACH use the second.
In its closed position, the main contactor [Q10] supplies the power
stage of the truck, e.g. ACT and ACH.
In its closed position, the key contactor [K20] supplies other electronic
units
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