Test Step 2. Use Cat ET to Verify the Driver Alert Function of the PTO Shutdown

350

TM 9-2320-312-24-2

Troubleshooting Section

"Service"

B. Access the Customer Parameters on Cat ET.

Access the following display screens in order:

"Configuration"

"Service"

b. Record the programmed PTO shutdown time.

"Configuration"

The PTO shutdown time must be between 3

and 1440 minutes. If the PTO shutdown time

is programmed to 0, the timer is disabled.

a. Record the programmed PTO shutdown time.

The PTO shutdown Time must be between 3

c. Reprogram the PTO shutdown time to 3

and 1440 minutes. If the PTO shutdown time

minutes for this test.

is programmed to 0, the timer is disabled.

C. Observe the following items during the 90 second

C. Start the engine. Allow the engine to warm up

period before the programmed shutdown time:

until the coolant temperature is 38 C (100 F).

Allow the engine to operate at the programmed

Check engine lamp

low idle and turn off any unnecessary accessory

devices.

Status of the PTO shutdown timer

D. Ensure that all unnecessary loads are turned off.

PTO switch on lamp

E. Use the following procedure in order to check

the operation of the PTO shutdown:

During the 90 second period before the

scheduled shutdown, the status should change

a. Park the vehicle.

from "COUNTING" to "DRIVER ALERT" and the

check engine lamp and the PTO switch on lamp

b. Ensure that the PTO configuration is

should flash rapidly.

programmed to "Cab Switches", "Remote

Switches" or "Remote Throttle".

Note: A PTO switch on lamp is an optional feature

and the PTO switch on lamp may not be installed.

c. Ensure that the status of the PTO on/off switch

is on.

D. Reprogram the PTO shutdown timer to the value

that was recorded earlier for this test.

d. Observe the status of the "PTO Shutdown".

Expected Result:

Result 1 The driver alert function of the PTO

Result 1 The status of the parameter for "PTO

shutdown operates in the manner that is described

Shutdown" indicates "COUNTING".

above.

Result 2 The ECM is not reading the proper

Result 2 The PTO switch on lamp did not flash.

conditions for activation of the timer.

Result 3 The check engine lamp did not flash.

Results:

Result 1 The ECM is reading the proper

Result 1 The PTO shutdown timer is operating

conditions for the activation of the PTO shutdown

timer. Proceed to Test Step 2.

properly. Clear all diagnostic codes. STOP.

Result 2 Proceed to Test Step 3.

Result 2 The PTO switch on lamp did not flash

during the driver alert.

Test Step 2. Use Cat ET to Verify

the Driver Alert Function of the PTO

Repair: Perform the following diagnostic

Shutdown

procedure: Troubleshooting, "PTO Switch ON

Lamp Circuit - Test"

A. Connect Cat ET to the cab data link connector.

STOP.

B. Use the following procedure in order to activate

Result 3 The check engine lamp did not flash

the PTO shutdown timer:

during the driver alert.

a. Access the "Customer Parameters" on Cat ET.

Access the following display screens in order: