Genie with Ford engine (petrol/LPG): ECM engine controller codes
Genie error code 631 — External 5V DC Ref Lower than Expected
Message on the display: External 5V DC Ref Lower than Expected
Code 631 occurs in machines: Genie Z-80/60, S-80, S-85, GS-3384 RT, GS-3390, GS-4390, GS-5390.
warning / function limited
The Genie display shows code 631 with the message “External 5V DC Ref Lower than Expected”. It is a warning: some functions of the machine may be limited until the cause has been removed.
Possible causes
- Engine harness wiring and/or connections open or shorted to ground.
- there is a faulty engine sensor.
- ECM is faulty.
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.
Solution from the manual
Locate and repair any engine harness wiring damage or shorts OR locate and troubleshoot or repair faulty engine sensor OR replace ECM.
Source: Genie Service Manuals S-60/S-65 (65196), S-80/S-85 (111165), Z-80/60 (88619), GS-3384 (82259), GS-3390/4390/5390 (72863), Ford Engine ECM Fault Code Chart.
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 631 not go away?
RK Rental services Genie 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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