JLG 510AJ Service Manual - Manual (Page 152)

SECTION 3 - CHASSIS AND TURNTABLE
3-110 – JLG Lift – 3121181
DTC 219- RPM Higher Than Max Allowed Governed
Speed
• Max Govern Speed Override- Crankshaft Position Sensor
• Check Condition-Engine Running
• Fault Condition-Engine speed greater than the max gover-
nor override speed as defined in the diagnostic calibration
• Corrective Action(s): Sound audible warning or illuminate
secondary warning lamp, reduce throttle to limit speed.
Recommend closed loop and adaptive learn fueling correc-
tion remains active during fault.
• Non-emissions related fault
This fault will set anytime the engine RPM exceeds the limit set
in the diagnostic calibration for the latch time or more. This
speed overrides any higher max governor speeds pro-
grammed by the user. This fault is designed to help prevent
engine or equipment damage.
The throttle will be lowered in order to govern the engine to
the speed set in the diagnostic calibration.
DTC 219- RPM Higher Than Max Allowed Governed Speed
(continued)
Diagnostic Aids
NOTE: If any other DTCs are present, diagnose those first.
• Ensure that no programmed governor speeds exceed the
limit set in the diagnostic calibration for Max Gov Override
Speed
• Check mechanical operation of the throttle actuator
2
16
13
12
1
5V_ext
Vs=+5 VDC
5V_rtn
TPS1
TPS SER +
+
-
Motor
DBW-
DBW+
ECM
H-Bridge
19
TPS SER -
Serial
xmitter
Electronic Throttle Actuator w/Analog Position Feedback Electronic Throttle Actuator w/Serial Position Feedback