JLG 600SC_660SJC Service Manual - Manual (Page 206)

SECTION 6 - TURNTABLE
6-60 – JLG Lift – 3121157
DTC 1612- Microprocessor Failure - RTI 1
• Engine Control Module
• Check Condition- Key on
• Fault Condition- Internal microprocessor error
• MIL- On until code is cleared by technician
• Adaptive- Disabled for the remainder of the key-on
cycle
• Closed Loop- Enabled
• Power Derate (level 2 until fault is cleared manually)
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.
The ECM will reset itself in the event this fault is set, and
the MIL will be on until the code is cleared. This fault
should be erased after diagnosis by removing battery
power. It will not self-erase.
During this active fault, Power Derate (level 2) will be
enforced. When this is enforced, maximum throttle posi-
tion will be 20%. This is enforced until the fault is manually
cleared.
RAM
ECM
Microprocessor