Dtc 2111- unable to reach lower tps, Dtc 2111- unable to reach lower tps -166 – JLG 450A_AJ Series II Service Manual User Manual
Page 206
SECTION 3 - CHASSIS & TURNTABLE
3-166
– JLG Lift –
3121290
DTC 2111- Unable to Reach Lower TPS
• Throttle Position Sensor
• Check Condition-Cranking or Running
• Fault Condition-Throttle command is 20% less than throttle
position for 200ms or longer
• MIL-On during active fault
• Engine Shut Down
On a diesel engine, an actuator controls a fuel injection pump,
directly affecting the fueling level into the cylinders. This may
be by direct manipulation of the fuel injection pump rack or
by manipulation of the mechanical governor control level or
“throttle arm.” In the DGC ECM and EDIS, references to the
throttle and throttle position sensor refer to these fuel injec-
tion pump control actuators and their position feedback sen-
sors. When the fuel injection pump is electronically controlled
it can control idle stability and limit engine speed based on
operating conditions.
The Throttle Position Sensor uses either 1) a variable resistor
and voltage divider circuit or 2) a non-contact hall-effect sen-
sor to determine throttle actuator position, and is located
within the throttle actuator.
There are two types of throttle actuators, 1) actuator with ana-
log position feedback and 2) actuator with digital position
feedback. The first type, with analog position feedback, pro-
vides an analog return signal between 0 and 5 volts that is pro-
portional to the throttle actuator position. The second type,
with digital position feedback, provides a serial data signal to
the ECM with the throttle actuator position voltage level
encoded in the data stream.
Fault sets if throttle command is 20% less than actual throttle
position. During active fault, MIL light is on and engine shuts
down.
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le
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5
V
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5
V
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B
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-
D
B
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9
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Electronic Throttle
Actuator w/Serial
Position Feedback
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