Linde 350 Series Service Training page 138

Section 2
Page 112
62 Sudden change in RPM signal from over 800 to 0 rpm
The vehicle no longer detects any engine speed, although the engine was not shut down with the
ignition key.
Possible causes: speed sensor 1B1 defective, cable loom to the speed sensor has an open
connection
Truck response: W
65 Tilt pressure signal of 6 bar without RPM
The controller senses an active (closed) pressure switch 1S1 although no engine RPM exists
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Possible causes: pressure switch 1S1 defective, cable loom from pressure switch 1S1 is shorted
66 Lift pressure signal of 14 bar without RPM
The controller senses an activated (closed) pressure switch 1S2, although no engine RPM
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Possible causes: pressure switch 1S2 defective, cable loom from pressure switch 1S2 shorted
Truck response: W
67 Lift and tilt signals incompatible (14 bar before 6 bar)
The normal switching sequence, first 1S1 then 1S2, is out of sequence.
Possible causes: connectors of both pressure switches 1S1 and 1S2 are interchanged, pressure
switch 1S1 defective, cable loom from pressure switch 1S1 has an open connection.
Truck responses: W
70 - 79 Mutual monitoring of both processors
The internal communication between the master and the safety processor is faulty.
Possible cause: LHC-module 1N2 defective
Truck responses: W – E – L – F – S
80 - 99 Safety processor error messages
The safety processor is detecting errors in LHC module 1N2.
Possible cause: LHC module 1N2 defective
Truck responses: W – E – L – F – S
NOTE: If there is a single error code between 70 - 99, the LHC module can be assumed to be defective.
If further codes under 70 are detected, these must be considered first.
NOTE: If there is no diagnostic output of module LHC 1N2 and/or the vehicle can not be started, and/
or the warning lamp is not on, LHC module 1N2 can be assumed to be defective if the following
conditions are fulfilled:
- Fuse 1F17 and 1F18 are OK
- Power supply, positive and negative signals present
- Diagnostic cable (communications to the test module/ laptop) is OK
02.01
Service Training
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