Linde 350 Series Service Training page 94

Section 2
Page 68
35 Travel direction signal encoding is not OK
The controller can not sense if it is a single-pedal or two-pedal vehicle.
Possible causes: encoding plug (near key switch); travel direction switch not connected or faulty,
cable loom (negative signals to LHC box not present, check)
--> Window 4)
Truck responses: W – B – L
36 Signal from travel direction switch
A signal expected from the travel direction switch can not be detected.
Possible causes: travel direction switch, cable loom (check negative signals coming from travel
direction switch to LHC box ) --> window 4
Truck responses: W – B – L
37 Brake switch 1 (1S5) breaker and maker have the same signal.
The brake switch does not change its outputs from 0 to 1 and from 1 to 0. --> window 4
Possible causes: brake switch defective, open connection (check negative signals coming from
brake switch to LHC module)
Truck responses: W – B
38 Switching sequence of brake switch 1 (1S5) and brake switch 2 (S14) is not OK.
The controller first expects (operation of brake pedal) brake switch 1 (1S5), before brake switch
2 (S14) becomes active. --> window 4
Possible causes: both brake switch connectors interchanged; brake switch 1 (1S5) not
connected, brake switch 1 defective; cable loom from brake switch 1 to LHC module
Truck responses: W – B
39 Seat switch breaker and maker have the same signal
The seat switch is activated --> window 72 and both output signals of the seat switch show the
same value 00 or 11. --> window 4
Possible causes: seat switch is switched active but not connected; seat switch defective; open
connection (seat switch - LHC module); cable loom
Truck responses: W – B – L
41 vs is under 8 Volt although vr is over 11 Volt
Supply voltage vs for the traction potentiometer is under 8 Volt, although supply voltage vr for the
LHC module is over 11 Volt. --> window 6
Possible cause: voltage regulator in LHC module
Truck responses: W – B – L
43 Controller without power
The LHC module is without supply voltage vr . --> window 6
Possible causes: fuse 1F18 defective; cable loom at LHC module not connected to positive and
negative terminals.
Truck responses: W – B – L
44 Safety relay in the controller can no longer be switched off
Safety relay K1 in the LHC module (switched off briefly when the ignition key is turned) is sticking.
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Service Training