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TM 9-2320-360-20-1
(21)
Historical Codes - All codes kept in ECM memory (may not turn the CHECK ENGINE indicator). These
codes can be cleared by using the Diagnostic Data Reader.
(22)
OPS - Oil Pressure Sensor: monitors oil pressure at the main oil gallery.
(23)
OTS - Oil Temperature Sensor: monitors oil temperature in the turbo oil supply line.
(24)
PCB - Protective Control Box: Located on the firewall above the brake pedal.
(25)
PW - Pulsewidth: the amount of time in crank degrees that the ECM is requesting the injectors to be turned
on.
(26)
SEL - CHECK GAUGES Indicator: mounted on the dash, it lights to warn the driver when a potential
engine damaging condition has been detected (low oil pressure, low coolant, or engine over temperature).
As a light bulb check and system check, the CHECK GAUGES indicator will come on for about five seconds
when ignition takes place.
(27)
SRS - Synchronous Reference Sensor: detects when the first cylinder in the firing order is about to be
fired.
(28)
STE/ICE - R - Simplified Test Equipment for Internal Combustion Engines - Reprogrammable: A testing
system used for performing tests and measurements on the vehicle. In addition to acting as a conventional
digital multimeter to measure voltage, current and resistance, it is also capable of measuring pressure,
speed, compression unbalance, engine power, and some specialized battery and starter evaluations. It is
powered from the vehicle batteries. The complete system includes a vehicle test meter (VTM), a
transducer kit (TK), cables, transit case, and technical publications. STE/ICE tests are referenced.
(29)
System: A collection of devices which are all related to each other because they depend on each other to
do some function or job. For example, the function of the fuel system is to inject fuel into the cylinders at
the correct time in the correct quantity. The collection of devices that are required to do this include the fuel
pump, fuel lines, lift pump, fuel filter, injection pump, and injectors.
(30)
TBS - Turbo Boost Sensor: used to monitor turbo boost pressure. The sensor generates a voltage (from 0
to 5 volts) which is proportional to pressure.
(31)
Test Chain: A series of tests to be followed in a particular order or sequence(numbered).
(32)
TPS - Throttle Position Sensor: used to detect throttle request.
(33)
Troubleshooting: The process of making measurements and observing the operation of the vehicle to find
out if and where any problems exist.
(34)
TRS - Timing Reference Sensor: detects whenever any cylinder is about to be fired.
(35)
VIN - Vehicle Identification Number
(36)
VTM - Vehicle Test Meter: A box which performs the measurement and analysis functions of the STE/ICE-
R systems.
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