Ignore Brake/Clutch Switch Circuit

294

TM 9-2320-312-24-2

Troubleshooting Section

Note: The wiring for your particular application may

If the problem still exists, temporarily connect

be slightly different. The circuits for the sensor

a test ECM. Remove all jumpers and replace

common are used interchangeably by the OEM

all connectors. Recheck the system for active

of the vehicle. The following circuits are common

diagnostic codes and repeat the test step. If the

within the ECM:

problem is resolved with the test ECM, reconnect

the suspect ECM. If the problem returns with the

The "Input Sensor Common 1" is terminal 18.

suspect ECM, replace the ECM.

The "Input Sensor Common 2" is terminal 3.

Verify that the repair eliminates the problem.

The "AP Sensor/Switch Sensor Common" is

STOP.

terminal 5.

i01608362

Ignore Brake/Clutch Switch

Circuit - Test

SMCS Code: 1900-081-ZS

System Operation Description:

Use this procedure under the following situation:

Use this procedure to determine if the circuit for the

Ignore Brake/Clutch Switch is operating correctly.

Note: This feature is available with MAR98 and

newer software. This feature is also available with

OCT01 and newer software. The parameter "Input

# 5" has been replaced with the parameter "Ignore

Brake/Clutch Switch". To use this feature, the

"Ignore Brake/Clutch Switch" parameter must be

programmed to "J1/P1:47".

The following background information is related

to this procedure:

The ECM can use various inputs in a number

of ways. The inputs depend on the parameter

programming. Certain features are available on

several different inputs. The configuration for the

switch must match the actual switch installation in

order for the switch to function properly.

Ignore Brake/Clutch Switch

The ignore brake/clutch switch is typically used

with a "Cab Switches PTO Configuration" which

requires mobile use of the vehicle during PTO

operation. When the ignore brake/clutch switch is

ON, depressing the brake or the clutch will NOT

disengage PTO operation or a set engine speed. If

the "Input # 5" parameter is programmed to "None"

(default), this feature is not used. If the "Input # 5"

parameter is programmed to "Ignore Brake/Clutch",

then the feature is available and the switch circuit

should be connected to terminal 47 of the J1/P1

ECM vehicle harness connector.