Diagnostic aids – JLG 510AJ Service Manual User 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

5V_ext

Vs=+5 VDC

5V_rtn

TPS1

TPS SER +

Motor

DBW-

DBW+

ECM

H-Bridge

TPS SER -

Serial

xmitter

Electronic Throttle Actuator w/Analog Position Feedback

Electronic Throttle Actuator w/Serial Position Feedback