JLG 460SJ Service Manual - Manual (Page 236)

SECTION 3 - CHASSIS & TURNTABLE
3-184 – JLG Lift – 3120895
DTC 606- Microprocessor Failure - COP
• Engine Control Module
• Check Condition- Key on
• Fault Condition- Internal microprocessor error
• Corrective Action(s) - Illuminate MIL and/or sound
audible warning or illuminate secondary warning lamp,
disable adaptive fueling correction for remainder of key
cycle, recommend power derate 2 and low rev limit to
reduce possible engine damage and/or overspeed
condition
• Non-emissions related fault
The ECM has checks that must be satisfied each time an
instruction is executed. Several different things can hap-
pen within the microprocessor that will cause this fault.
If this fault sets, the ECM will reset itself and log the code.
The fault should be configured to never forget and will not
self-erase and will not clear until a technician performs
diagnostics and manually clears the code. This fault
should be configured to set a power derate 2 and low rev
limit to reduce possible engine damage and reduce possi-
bility of an overspeed condition.