JLG ES series scissor lifts (1930ES, 2030ES, 2630ES, 2646ES, 3246ES)
JLG error code 663 — CANBUS FAILURE - LOAD SENSING SYSTEM MODULE
Message on the display: CANBUS FAILURE - LOAD SENSING SYSTEM MODULE
blocking fault
With load sensing system enabled, the control system failed to receive messages from the load sensing system module.
Description from the JLG 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.
Checks from the manual
- Check ANALYZER -> MACHINE SETUP -> MODEL NUMBER is correct.
- Check ANALYZER -> MACHINE SETUP -> MARKET is correct.
- Check ANALYZER -> MACHINE SETUP -> LOAD is correct.
- Check for 24V between load sense system module connector J11 and J1-2.
- Turn on machine in platform mode. If DTC 662 is present, troubleshoot that DTC before continuing.
- Refer to Section 2.3: Troubleshooting in the LSS manual, 3124288.
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: JLG Service and Maintenance Manual, ES series (Diagnostic Trouble Codes section).
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 663 not go away?
RK Rental services JLG 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.