C7 Engines for Combat and Tactical Vehicles Caterpillar

Input Selections

Usage:

C7 FML

"Fan Override Switch"

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 activated, the ECM will receive a J1939 message. The ECM will disregard all other parameters for fan control and the ECM will turn on the fan.

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Table 1
Alternative	Default
"J1939 Body Controller" "J1939 Cab Controller" "J1939 Instrument Cluster"	"None"

"Transmission Neutral Switch"

This parameter is used to specify the input that will be used by the ECM to receive the status information from the neutral switch. The default J1/P1:62 configures the ECM to monitor pin 62 of the vehicle harness connector for a connection for the neutral switch circuit.

The ECM can also be configured to receive the status of the neutral switch via the J1939 data link. The transmission control module must be capable of supporting the required protocol of the broadcast announcement message.

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Table 2
Alternatives	Default
"J1939" "None"	"J1/P1:62"

"Exhaust Brake Switch"

The exhaust brake can be controlled by connecting an on/off switch into the ECM circuit for the output of the exhaust brake. The "Exhaust Brake Switch" parameter must be programmed to "None" if a switch is installed in the output circuit. A switch that is installed in the output circuit will disable the brake by opening the output circuit.

The exhaust brake can also be controlled by connecting a switch circuit to the ECM switch input. This parameter must be programmed to "J1/P1:16", "J1939 Body Controller", "J1939 Cab Controller", or "J1939 Instrument Cluster" if a switch is connected to the ECM at the dedicated input for the exhaust brake.

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Table 3
Alternative	Default
"J1/P1:16" "J1939 Body Controller" "J1939 Cab Controller" "J1939 Instrument Cluster"	"None"

"Ignore Brake/Clutch Switch"

This parameter configures an input for a brake/clutch disable switch. The "Ignore Brake/Clutch Switch" is used for applications that require the mobile use of the vehicle with a set engine rpm that does not require the brake or the clutch to disengage the engine rpm set speed. This parameter must be programmed to "J1/P1:47" for this feature to be enabled.

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Table 4
Alternative	Default
"J1/P1:47"	"None"

"Two Speed Axle Switch"

This parameter configures an input for a two-speed axle switch. When a two-speed axle is used, the change in gear ratios from the main drive axle ratio to the two-speed axle ratio alters the calibration of the vehicle speed signal. When the parameter is programmed to "J1/P1:6" and the switch is in the ON position the ECM automatically adjusts the vehicle speed calibration. This will ensure that the ECM driven speedometer and the information that is stored in the ECM correctly reflect the actual vehicle speed.

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Table 5
Alternative	Default
"J1P1:6"	"None"

"Vehicle Speed Input"

The ECM has an input circuit that can be used to receive vehicle speed information. The ECM input can receive the vehicle speed information in either of the following ways:

A vehicle speed sensor can be connected to the input.
A signal wire from an electronic control can be connected to the input.

The "Vehicle Speed Input" parameter must be programmed to "J1/P1:32 & 33" to use this option.

The ECM can also be configured to receive vehicle speed information from the transmission control module via the J1939 data link. The transmission must be capable of supporting the "J1939 ETC1 Broadcast Message". The "Vehicle Speed Input" must be programmed to "J1939-Trans".

The ECM can also be configured to receive vehicle speed information from the Anti-lock Brake System (ABS) via the J1939 data link. The ABS must be capable of supporting the "J1939 High Resolution Wheel Speed Broadcast Message". The "Vehicle Speed Input" must be programmed to "J1939-ABS".

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Table 6
Alternative	Default
"J1939-Trans" "J1939-ABS"	"J1/P1:32 & 33"

"PTO Engine Shutdown Switch"

This parameter configures an input to use for a PTO engine shutdown switch. The switch will shut down the engine when the engine is in PTO mode and there is no vehicle speed.

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Table 7
Alternatives	Default
"J1/P1:7" "J1P1:23"	"None"

"Torque Limit Switch"

This parameter configures an input for a torque limit switch. The torque limit switch is used to limit the engine torque. Only use this feature for temporary protection of equipment. This parameter must be programmed to J1/P1:7 or J1/P1:23 in order to enable this feature.

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Table 8
Alternative	Default
"J1/P1:7" "J1/P1:23"	"None"

"PTO Engine RPM Set Speed Input A"

This parameter configures an input for a PTO engine rpm set speed A switch. This switch is used to control engine speed during PTO operation. The "PTO Configuration" parameter must be programmed to "Cab Switches", to "Remote Switches" or to "Remote Throttle" and the "PTO Engine RPM Set Speed A" parameter must be programmed to a valid speed.

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Table 9
Alternative	Default
"J1P1:46"	"None"

"PTO Engine RPM Speed Input B"

This parameter configures an input for a PTO engine rpm set speed B switch. This switch is used to control engine speed during PTO operation. The "PTO Configuration" parameter must be programmed to "Cab Switches", to "Remote Switches" or to "Remote Throttle" and the "PTO Engine RPM Set Speed B" parameter must be programmed to a valid speed.

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Table 10
Alternatives	Default
"J1/P1:7" "J1P1:23"	"None"

"Diagnostic Enable"

This parameter configures an input for a diagnostic enable switch. The diagnostic enable switch is used to retrieve diagnostic flash codes. Set this parameter to "J1/P1:46" if a switch is wired to this input. Set this parameter to "J1939 Body Controller", to "J1939 Cab Controller", or to "J1939 Instrument Cluster" if a J1939 message is used.

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Table 11
Alternative	Default
"J1/P1:46" "J1939 Body Controller" "J1939 Cab Controller" "J1939 Instrument Cluster"	"None"

"Cruise Control On/Off Switch"

This parameter configures an input for a cruise control on/off switch. Set this parameter to "J1/P1:59" if a switch is wired to this input. Set this parameter to "J1939 Body Controller", to "J1939 Cab Controller", or to "J1939 Instrument Cluster" if a J1939 message is used.

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Table 12
Alternative	Default
"J1939 Body Controller" "J1939 Cab Controller" "J1939 Instrument Cluster"	"J1/P1:59"

"Cruise Control Set/Resume Switch"

This parameter configures an input for a cruise control set/resume switch. Set this parameter to "J1/P1:35 & 44" if a switch is wired to this input. Set this parameter to "J1939 Body Controller", to "J1939 Cab Controller", or to "J1939 Instrument Cluster" if a J1939 message is used.

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Table 13
Alternative	Default
"J1939 Body Controller" "J1939 Cab Controller" "J1939 Instrument Cluster"	"J1/P1:35 & 44"

"Cruise Control Pause Switch"

This parameter configures an input for use as a cruise control pause switch. This functionality is only available for use over a J1939 data link. This feature affects cruise control, elevated idle, and PTO operation.

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Table 14
Alternative	Default
"J1939 Body Controller" "J1939 Cab Controller" "J1939 Instrument Cluster"	"None"

"Clutch Pedal Position Switch"

This switch input is required for some transmission styles. A switch can be wired to this input or a J1939 message may be used as an input.

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Table 15
Alternative	Default
"J1939 Body Controller" "J1939 Cab Controller" "J1939 Instrument Cluster"	"J1/P1:22"

"Service Brake Pedal Position Switch #1"

This switch input is required. A switch can be wired to this input or a J1939 message may be used as an input.

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Table 16
Alternative	Default
"J1939 Body Controller" "J1939 Cab Controller" "J1939 Instrument Cluster"	"J1/P1:45"

"Accelerator Pedal Position"

The Input for the "Accelerator Pedal Position" is available for the connection of an accelerator pedal position sensor. Connect the sensor's signal line to ECM connector J1/P1:66. This parameter must be programmed to J1/P1:66. The input is used to determine the position of the accelerator pedal.

Note: This parameter is not programmable at this time.

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Table 17
Alternative	Default
"None"	"J1/P1:66"

"A/C High Pressure Switch"

This parameter determines if the high pressure switch for the air conditioning system will control the output for the cooling fan. When this parameter is programmed to "J1/P1:41", the ECM will turn on the cooling fan when the high pressure switch opens.

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