What should I do when a JLG shows code 84154?

Checks given in the manual: Check wiring and hardware Replace sensor and recalibrate.. Diagnosis by service. Clearing the code and calibrations are carried out by service according to the manual for the machine's serial number.

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

JLG error code 84154 — BOOM LENGTH SENSOR 2 FAULTY - REPLACE/RECALIBRATE SENSOR

Q: What does code 84154 mean on a JLG lift?

BOOM LENGTH SENSOR 2 FAULTY - REPLACE/RECALIBRATE SENSOR. There are three ways (a, b, c) that these faults can be set: (a) If the length sensor voltage changes more than 0.0168 volts within 40 milliseconds a counter for the respective length sensor shall be incremented to aid service in diagnosing bad sensor performance. The counter below shall be incremented anytime the description above is met. It is cleared/reset by a power cycle BmLenSnsr(1/2)Fault-Counter PowerCycle > _ 20 (b) The counter below shall be incremented every time BmLenSnsr(1/2)FaultCounter _ PowerCycle (described above) reached its threshold. This value is stored in EEPROM in order to track the history of the issue. (A successful Boom Sensor Calibration will reset this counter - t

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

Code 84154 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 0.0168 volts within 40 milliseconds a counter for the respective length sensor shall be incremented to aid service in diagnosing bad sensor performance. The counter below shall be incremented anytime the description above is met. It is cleared/reset by a power cycle BmLenSnsr(1/2)Fault-Counter PowerCycle > _ 20 (b) The counter below shall be incremented every time BmLenSnsr(1/2)FaultCounter _ PowerCycle (described above) reached its threshold. This value is stored in EEPROM in order to track the history of the issue. (A successful Boom Sensor Calibration will reset this counter - t

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 84154 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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JLG error code 84154 — BOOM LENGTH SENSOR 2 FAULTY - REPLACE/RECALIBRATE SENSOR

Possible causes

Checks from the manual

What service does

Neighbouring JLG codes