TM-9-2320-344-10
TRUCK, CARGO, GUIDED MISSILE TRANSPORTER (GMT), 8X8, M985A4GMT
TECHNICAL MANUAL; OPERATOR'S MANUAL
OCTOBER 2008
TM-9-2320-344-10 - Page 128 of 1012
4.
A backup EEPROM and microprocessor monitors and analyzes engine operation
should the main microprocessor fail and a throttle position sensor (2) input, which
is activated by the accelerator pedal.
TRAILER
AIR SUP LY
PARKING
BRAKE
TRAILER
AIR SUP LY
PARKING
BRAKE
AIR BRAKE
M
M
2
3
4
Figure 2.
The EUI allows precise metering and injection timing.
The engine sensors monitor key parts of the engine for performance and environmental
variables.
The ECM (1) features diagnostics which can sense electronic system malfunctions and
identify them by displaying a code.
A check engine indicator (3) on instrument panel will illuminate when a noncritical fault
occurs, but the vehicle can still be operated.
Diagnostic codes can be accessed by a PC based software program or a diagnostic data
reader connected to the vehicle at the electronic diagnostic receptacle (4).
TM 9-2320-344-10
0012
0012-2
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