PTO Switch ON Lamp Circuit

361

TM 9-2320-312-24-2

Troubleshooting Section

Repair: Perform the following diagnostic

I. While the status of the Remote PTO Resume

procedure:

Switch is being observed on ET, install the

jumper into the breakout T in order to connect

1. Temporarily connect a test ECM.

terminal 60 (input 3) to terminal 3 (input sensor

common #2). Also, while the switch status is

2. Ensure that the "PTO Configuration" of the test

being observed on ET remove the jumper from

ECM matches the "PTO Configuration" of the

the breakout T in order to disconnect terminal 60

suspect ECM.

(input 3) from terminal 3 (input sensor common

#2).

3. Remove all jumpers and replace all connectors.

The input 2 is the set switch for the PTO and the

4. Recheck the system for Active diagnostic

input 3 is the resume switch for the PTO.

codes.

Refer to Illustration 158.

5. Repeat the test step.

Expected Result:

6. If the problem is resolved with the test ECM,

reconnect the suspect ECM.

The switch status of the Remote PTO Set Switch on

ET behaves in the following manner:

7. If the problem returns with the suspect ECM,

The switch status of the Remote PTO Set Switch

replace the ECM.

is "OFF" when the jumper is removed.

8. Verify that the repair eliminates the problem.

The switch status of the Remote PTO Set Switch

STOP.

changes from "OFF" to set switch "ON" when the

jumper is connected from terminal 58 (input 2) to

terminal 3 (input sensor common #2).

i01613057

PTO Switch ON Lamp Circuit

The switch status of the Remote PTO Resume

Switch on ET behaves in the following manner:

- Test

The switch status of the Remote PTO Resume

SMCS Code: 7431-081

Switch is "OFF" when the jumper is removed.

System Operation Description:

The switch status of the Remote PTO Resume

Switch changes from "OFF" to resume switch

Use this procedure under the following situation:

"ON" when the jumper is connected from terminal

60 (input 3) to terminal 3 (input sensor common

Use the following information in order to determine

#2).

if the PTO Switch ON Lamp is operating incorrectly.

Results:

Terminal 30 (Output 1)

Yes The input 2 (Remote PTO Set Switch) and

Output 1 can be used as a PTO Switch On Lamp

the input 3 (Remote PTO Resume Switch) of the

output. If the "PTO Configuration" is programmed

ECM are functioning correctly. The problem is in

to "Cab Switches", "Remote Switches", or "Remote

the switches of the vehicle or the problem is in

Throttle", the output will turn on the lamp whenever

the wiring of the vehicle.

the PTO Switch Circuit is turned on.

Repair: Inspect the wiring. Select one of the

Electrical Connection of Lamps

following options:

One terminal of the lamp must be connected to

Repair the wiring or replace the wiring.

battery voltage through the vehicle wiring. The other

terminal is connected to the ECM at the vehicle

Send the vehicle to the OEM dealer for repair.

harness connector J1/P1 at terminal 30.

Verify that the repair eliminates the problem.

The ECM provides a path to ground in order to turn

on the lamp.

STOP.

No The ECM is not reading the switch status

change.