Normally open switch – JLG 510AJ Service Manual User Manual
Page 160
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SECTION 3 - CHASSIS AND TURNTABLE
3-118
– JLG Lift –
3121181
Normally Open Switch
• Key-On, Engine On
• System Mode= “Running”
• Warm engine at idle to normal
operating temperature
• Increase RPM above limit set
in diagnostic calibration
Does DTC 524
reset ?
Intermittent Problem
No
• Key Off
• Disconnect harness from Oil Pressure switch
• Clear DTC 524
• Key On, Engine On
• System Mode= “Running”
• Operate engine et idle for at least one minute
• Increase RPM above limit set in diagnostic calibration
Yes
Does DTC 524
reset?
• Oil Pressure circuit shorted-to-ground in harness
• Faulty ECM
• Faulty Oil Pressure Switch (short circuit)
• Faulty engine oiling system (verify with
mechanical gauge)
No
Yes
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