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JLG boom lifts (450AJ, 600AJ, 800AJ, 460SJ, 660SJ, 860SJ, 1250AJP, M450AJ, M600JP)

JLG error code 227 — STEER SWITCHES FAULTY

Message on the display: STEER SWITCHES FAULTY · flash code 2/2

Code 227 occurs in machines: JLG 860SJ, 800S, 600AJ, 600S, 660SJ, 800AJ, 800A, 460SJ, 400S, 1250AJP, M450AJ, E450AJ, M600JP, E600JP, 1100S, 1100SJP, 340AJ, 600SC, 600SJC, 660SJC, 450AJ SII, 510AJ.

blocking fault

Both Steer Left and Steer Right inputs are closed simultaneously.

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

  • The UGM shall prohibit Steer; The UGM shall limit Drive to Creep The Steer Left switch input = Low; The Steer Right switch input = Low; Steer and full Drive speed permitted after controls are initialized.

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 Manuals: 600AJ (3121201), 800AJ (3120858), 460SJ, 860SJ, 1250AJP (3122581800), M450AJ (3121829), M600JP (3121711), Diagnostic Trouble Codes tables.

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 227 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.

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