Test Step 4. Check the PTO On/Off Switch Circuit with ET

357

TM 9-2320-312-24-2

Troubleshooting Section

Test Step 5. Check Status of the

Repair the connectors or wiring and/or replace

Set/Resume Input on ET.

the connectors or wiring. Ensure that all of the

seals are properly in place and ensure that the

connectors are completely coupled.

Note: The set/resume input increases the engine

rpm and the set/resume input decreases the engine

Verify that the repair eliminates the problem.

rpm.

STOP.

A. Find the PTO set/resume switch. If the "PTO

Configuration" is programmed to "Cab Switches",

Test Step 4. Check the PTO On/Off Switch

the cruise control set/resume switch will be

Circuit with ET.

used. If the "PTO Configuration" is programmed

to "Remote Switches" or "Remote Throttle", a

dedicated PTO set/resume switch will be used.

A. Turn the ignition key switch to the ON position.

B. For the input 1 (PTO on/off switch), access the

The "PTO Configuration" is programmed to

ET status screens that display the following

Cab Switches.

status parameters:

Look at the status for the "Cruise Control

"PTO Config"

Set/Resume Switch" parameter on ET. The

parameter is located on the same status screen

"PTO ON/OFF Switch"

as the cruise/idle switch.

B. While the ET status screen for the switch is being

C. Verify that each of the PTO interlocks are set.

monitored, perform the following procedure in

Then, while the ET status screen is being

order:

monitored turn on the PTO on/off switch and turn

off the PTO on/off switch.

Put the cruise control set/resume switch in the

An example of a PTO interlock would be a

Set position.

parking brake that is intended to allow PTO

Release the cruise control set/resume switch

engine control under specific conditions.

from the Set position.

Expected Result:

Put the cruise control set/resume switch in the

Result 1 The status of the PTO on/off switch on ET

Resume position.

changes from "OFF" to "ON" when the PTO on/off

Release the cruise control set/resume switch

switch is turned to the OFF position and the ON

position, but the set/resume switch is not operating

from the Resume position.

correctly.

The "PTO Configuration" is programmed to

Result 2 The status of the PTO on/off switch on ET

Remote Switches or Remote Throttle.

changes from "OFF" to "ON" when the PTO on/off

switch is turned to the OFF position and the ON

View the status parameter on ET for the "Remote

position. However, the remote accelerator is not

PTO Set Switch" and the "Remote PTO Resume

operating correctly.

Switch".

Result 3 The status of the PTO on/off switch on ET

C. While the ET status screen for the switch is being

does not change from "OFF" to "ON" when the PTO

monitored, perform the following procedure in

on/off switch is turned to the OFF position and the

order:

ON position.

Put the remote PTO set/resume switch in the

Results:

Set position.

Result 1 Proceed to Test Step 5.

Release the remote PTO set/resume switch

from the Set position.

Result 2

Put the remote PTO set/resume switch in the

Repair: Perform the following diagnostic

Resume position.

procedure: Troubleshooting, "Remote PTO

Release the remote PTO set/resume switch

Accelerator Position Sensor Circuit - Test"

from the Resume position.

STOP.

Result 3 Proceed to Test Step 6.