T-code Valid from serial number
403-414, 669-671, 716-718 713962-
Date Order number
2005-06-01 218920-040
43-  4 Service  Manual  REFLEX RR B,E RR B,E CC © BT Europe AB
Truck log system, code lock – 9420
I/O Module
If the truck does not start:
• Check there is 48 V on cable 21 measured with a minus on cable 40.
• Check that there is a minus on contact X3:9. This activates the TLS 
function
• In the event of error code 3 (shock sensor activated) and 4 (truck dis-
abled), see chapter “Warning codes without registration” C code 
5710 in this manual. 
For further information, see Davis Derby information.
43.4  I/O Module
The I/O module is used to communicate with the electronic card [A5]. 
The module has 2 outputs that can be loaded with a maximum of 
100mA, producing an output voltage of 48V. Communication with the I/
O module is via the CAN bus. The inputs are not used.
I/O
CAN
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