Fuel Temperature Sensor

TM 9-2320-312-24-2

Troubleshooting Section

Idle Shutdown Time This programmable

Fuel Temperature Sensor This sensor detects

parameter indicates a designated idle time in

the fuel temperature. The ECM monitors the fuel

minutes that is allowed before shutdown.

temperature and the ECM adjusts the calculated

fuel rate accordingly.

Idle/PTO Bump rpm This programmable parameter

indicates the amount of change to the engine rpm

Full Load Setting (FLS) The FLS is the number

that will occur when the switch for acceleration is

that represents the fuel system adjustment. This

toggled or the switch for deceleration is toggled.

adjustment is made at the factory in order to help

ensure the maximum fuel delivery of the fuel system.

Injector Codes The injector codes or injector trim

The correct value for this parameter is stamped on

codes are numeric codes or alphanumeric codes

the engine information ratings plate. This parameter

that are etched or stamped on individual injectors.

must be programmed. If the parameters are not

programmed 253-02 Check Customer Parameters

Injection Actuation Pressure Control Valve This is a

will be generated or 56 Check System Parameters

dump valve that is controlled by an electrical signal

will be generated.

that maintains high pressure for the high pressure

oil manifold. The ECM controls the pressure in

Full Torque Setting (FTS) The FTS is similar to

the high pressure oil manifold by inputs from the

the FLS. This parameter must be programmed. If

other sensors. The control valve regulates the high

the parameters are not programmed 253-02 Check

pressure oil to the hydraulic electronic unit injector

Customer Parameters will be generated or 56

through the high pressure oil manifold. Proper fuel

Check System Parameters will be generated.

injection pressure is necessary for desired engine

operation.

Gear Down Protection This feature consists of the

high gear limits that are programmable. High gear

Injection Actuation Pressure Sensor An electrical

limits are used in order to promote driving in higher

sensor on the high pressure oil manifold converts

gears for increased fuel economy.

oil pressure into an electrical signal for the ECM.

Harness The harness is the bundle of wiring

Inlet Manifold Air Temperature Sensor This sensor

(loom) that connects all components of the

detects the air inlet temperature. The ECM monitors

electronic system.

the inlet air temperature and other data in order

to adjust injection timing and other performance

Hertz (Hz) Hertz is the measure of electrical

functions.

frequency in cycles per second.

Integrated Electronic Controls The engine is

High Pressure Oil Manifold The high pressure

designed with the electronic controls as a necessary

oil manifold is an oil gallery that is added to the

part of the system. The engine will not operate

cylinder head in order to supply the unit injectors

without the electronic controls.

with high pressure oil.

J1939 Data Link This data link is an SAE

High Pressure Oil Pump The high pressure oil

diagnostic communications data link that is used to

pump is an axial piston pump that is driven by

communicate between the electronic engine, the

gears. The high pressure oil pump is used to raise

transmission, and/or the power train controls.

the engine oil pressure in order to activate the unit

injectors. The amount of oil pressure that is required

Kickout Switch This term refers to the service

to activate the unit injectors is called the actuation

brake switch and the clutch switch. These switches

pressure.

are used as an exit or a kickout for the cruise

control set speed, the idle speed setting, or the

Histogram The histogram is a bar graph which

PTO/idle set speed.

may indicate the relative frequency of vehicle

operation in specific operating ranges. A histogram

Latch Mode This is a programmable parameter

can be used to show many relationships.

for control of the exhaust brake. The exhaust

brake engages when the service brake pedal is

Hydraulic Electronic Unit Injector (HEUI) The unit

depressed. The exhaust brake remains engaged

injector is an injection pump which is a hydraulically

until the control detects a change in a control input.

actuated, electronically controlled unit injector. This

unit combines the pumping, electronic fuel metering

Logged Diagnostic Codes Logged diagnostic

and injecting elements in a single unit.

codes are codes which are stored in memory.

These codes are meant to be an indicator of

Idle rpm Limit This is a programmable parameter

possible causes for intermittent problems. Refer to

which indicates the maximum allowable engine rpm

the Diagnostic Fault Code for more information.

that is allowed when the engine rpm is set with the

cruise set/resume switch.