OCT01 and newer Personality Modules -807640236

TM 9-2320-312-24-2

Troubleshooting Section

The ECM can also be configured to receive vehicle

This parameter configures an input for use as a

speed information from an Electronic Transmission

cruise control pause switch. This functionality is

Control Unit via the J1939 data link. The transmission

only available for use over a J1939 data link. This

must be capable of supporting the "J1939 ETC1

feature affects cruise control, elevated idle, and

Broadcast Message". The "Vehicle Speed Input"

PTO operation.

must be programmed to "J1939-Trans".

Table 92

The ECM can also be configured to receive vehicle

Alternative

Default

speed information from the ABS system via the

"J1939 Body Controller"

"NONE"

J1939 data link. The ABS system must be capable

"J1939 Cab Controller"

of supporting the "J1939 High Resolution Wheel

"J1939 Instrument Cluster"

Speed Broadcast Message". The "Vehicle Speed

Input" must be programmed to "J1939-ABS". The

"J1939-ABS" option is only available with OCT01

"A/C High Pressure Switch"

and newer Personality Modules .

OCT01 and newer Personality Modules.

Table 95

This parameter determines if the high pressure

Alternative

Default

switch for the air conditioning system will control the

"J1939-Trans"

"J1/P1:32 & 33"

output for the cooling fan. When this parameter is

"J1939-ABS"

programmed to "J1/P1:41", the ECM will turn on the

cooling fan when the high pressure switch opens.

"Fan Override Switch"

Table 93

OCT01 and newer Personality Modules.

Alternatives

Default

"None"

"J1/P1:41"

This parameter selects the J1939 source that will

broadcast a switch position in order to override

the fan control. When the fan override switch is

"A/C Fan Request Switch"

activated, the ECM will receive a J1939 message.

The ECM will disregard all other parameters for fan

Note: This feature is only available when "Truck

control and the ECM will turn on the fan.

Manufacturer" is programmed to "GMT-560".

Table 96

OCT01 and newer Personality Modules.

Alternative

Default

This parameter configures the cooling fan to start

"J1939 Body Controller"

"NONE"

when the clutch for the air conditioning compressor

"J1939 Cab Controller"

is engaged.

"J1939 Instrument Cluster"

Table 94

"Service Brake Pedal Position Switch #1"

Alternatives

Default

"J1/P1:41"

"J1/P1:62"

OCT01 and newer Personality Modules.

This switch input is required. A switch can be wired

"Vehicle Speed Input"

to this input or a J1939 message may be used as

an input.

The ECM has an input circuit that can be used to

receive vehicle speed information. The ECM input

Table 97

can receive the vehicle speed information in either

Alternative

Default

of the following ways:

"J1939 Body Controller"

"J1/P1:45"

A vehicle speed sensor can be connected to the

"J1939 Cab Controller"

input.

"J1939 Instrument Cluster"

A signal wire from an electronic control can be

"Clutch Pedal Position Switch"

connected to the input.

OCT01 and newer Personality Modules.

The "Vehicle Speed Input" parameter must be

programmed to "J1/P1:32 & 33" to use this option.