Haulotte: Activ'Screen (HA/HT RTJ, PRO) and ZAPI controllers (Compact, Optimum)
Haulotte error code F04.34 — Front Axle Unlocking — YV101
Message on the display: Front Axle Unlocking — YV101
blocking fault
b0 • Digital output's failure : Oscillating axle unlocking with oscillating axle option--> YV101=FAIL & VAR[OscillatingAxleEnable]. • Check YV101 : Check connection to ground, check connection to U106 ECU digital output, check connection to electrical collector, check connection between electrical collector and electrovalve. b1 • Detection of incoherence between the state of control for oscillating axle and pressure in the oscillating axle control valve when drive control is above the third of maximum control : --> YV101=ON & D2000ms((WUI-SP109)<1500mV) & VAR[OscillatingAxleEnable]. • Check YV101 : Check connection to ground, check connection to U100 ECU digital output, check connection to electrical collector, check connection between electrical collector and electrovalve. • Check SP109 : Check connection to ground, check connection to U100 ECU digital input, check connection to electri
Description from the Haulotte service manual, in the original wording.
Possible causes
The manual does not list the causes for this code: the service technician establishes them during diagnosis of the machine.
What you can do
Switch the machine off with the emergency stop and switch it on again. If the code comes back, do not use the machine and call service.
What service does
A qualified service technician reads the code with the manufacturer's diagnostic tools, finds the cause, clears the code and carries out a function test.
Source: Haulotte Maintenance Book HA16 RTJ / RTJ O / RTJ PRO (4000865070) and Compact 8–14 (4001181580, ZAPI alarms).
The descriptions are quoted from the manufacturer's service documentation and are for guidance only. Clearing codes, calibrations and repairs are carried out by a qualified service technician according to the manual for the specific serial number. A machine with an active blocking code must not be used until the cause has been removed.
Does code F04.34 not go away?
RK Rental services Haulotte lifts at our workshop or on site at the customer's premises (construction site, factory, warehouse). We read the code, remove the cause and select the parts by serial number.
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