ECM Lifetime Totals

TM 9-2320-312-24-2

Troubleshooting Section

PTO time and PTO fuel are logged when engine rpm

In this situation, the system has no faults except

is set by using the cruise switches and the engine

when either of the following conditions exist:

is operating under some load. Also, PTO time and

There are several occurrences of the diagnostic

PTO fuel are logged when the PTO on/off switch is

in the ON position and vehicle speed is within the

code in a very short period of time.

range of the "PTO Vehicle Speed Limit" parameter.

The ECM is indicating an active code at the

Idle time and idle fuel can include operating time

present time.

when all of the following conditions are met:

Diagnostic Event Codes

When engine speed is set by using the cruise

switches and the vehicle speed is within the

Diagnostic event codes are used to indicate that

range of the "Idle Vehicle Speed Limit" parameter.

some operational problem has been detected in

the engine or in the truck by the ECM. Usually, this

The engine is not operating under a load.

does not indicate an electronic malfunction.

Fuel information can be displayed in US gallons

The ECM also provides an ECM date/time clock

or liters.

that is used to time stamp the following diagnostic

event codes:

"Average Load Factor" provides relative engine

operating information. Engine load factor compares

84-00 Vehicle Overspeed Warning (41)

actual engine operation information to the maximum

engine operation that is available. "Average Load

100-11 Very Low Oil Pressure (46)

Factor" is determined by using "Total Maximum

Fuel", "Idle Fuel", and Fuel Consumption. "Total

110-11 Very High Coolant Temperature (61)

Maximum Fuel" is the maximum amount of fuel

that is used by the engine during operation. All

111-11 Very Low Coolant Level (62)

of these parameters are available by using with

the electronic service tool. These parameters are

190-00 Engine Overspeed Warning (35)

available within the menu for current tools.

ECM Lifetime Totals

Trip Data that is Stored in the ECM

The ECM maintains total data of the engine for the

The Fleet Trip Data allows the tracking of engine

following parameters:

operation by the vehicle owner over intervals that

are defined by the vehicle owner (July 1999 and

Total Time (Engine Hours)

newer personality modules). All of the trip data is

stored in memory and the trip data is maintained

Total Distance

through the unswitched battery lines when the

ignition switch is off. An internal battery will maintain

PTO Time and PTO Fuel

this information while the unswitched battery lines

are disconnected.

Idle Time and Idle Fuel

Fleet Trip Data

Average Load Factor (Engine)

Total Fuel

Fleet Trip Data includes a "Fleet Trip Segment",

histograms, and custom data. The "Fleet

Total Maximum Fuel

Trip Segment" includes data for the following

parameters:

The total time is the engine's operating hours. The

Time (engine hours)

engine hours do not include operating time when

the ECM is powered ON but the engine is not

Driving Time

running.

Distance

Distance data requires a vehicle speed sensor or

an electronic vehicle speed source to be connected

Fuel

to the ECM. The same sensor is used for ECM

vehicle speed. Distance can be displayed in miles

Idle Time

or kilometers.

Idle Fuel