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

JLG error code 84152 — TOWER LENGTH SENSOR 2FAULTY - REPLACE/RECALIBRATE SENSOR

Message on the display: TOWER LENGTH SENSOR 2FAULTY - REPLACE/RECALIBRATE SENSOR

Code 84152 occurs in machines: JLG 1250AJP.

blocking fault

There are three ways (a, b, c) that these faults can be set: (a) If the length sensor voltage changes more than 1.44 inches within 40 milliseconds a counter for the respective length sensor shall be incremented to aid service in diagnosing

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 wiring and hardware Replace sensor and recalibrate.

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 84152 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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