Test Step 1. Verify Activation of the Idle Shutdown Timer

285

TM 9-2320-312-24-2

Troubleshooting Section

The engine is not in Cold Mode or Dedicated

The idle shutdown timer can be temporarily

disabled by using ET. The idle shutdown timer

PTO Mode.

can be temporarily disabled through the "System

The engine is not under load.

Troubleshooting" screen which can be found by

selecting "Diagnostic Tests" under the "Diagnostics"

menu. Select "Idle Shutdown Timer" and click the

The timer can be reset by moving the vehicle or

"Change" icon. When the dialog box appears,

the timer can be reset by quickly depressing the

change the value to "OFF". Temporarily disabling

accelerator pedal and releasing the accelerator

this feature avoids engine shutdowns when you

pedal.

are troubleshooting other systems. Using this

method eliminates the need to temporarily alter

The check engine lamp will begin to rapidly flash

the Customer Specified Parameter "Idle Shutdown

90 seconds before the programmed time expires.

Timer".

During this 90 second time period, the following

conditions can disable the timer:

Note: If the following diagnostic code is active, the

The clutch pedal is depressed.

idle shutdown timer will not operate.

The service brake pedal is depressed.

84-08 Vehicle Speed Out Of Range (36)

Test Step 1. Verify Activation of the Idle

The following event code will be logged when the

Shutdown Timer.

driver overrides the timer by using the clutch pedal

or the brake pedal during the 90 second period:

A. Connect ET to the cab data link connector.

71-00 Idle Shutdown Override (01)

B. Access the Customer Parameters on ET.

If the parameter "Allow Idle Shutdown Override"

is programmed to "NO", the timer can not be

a. Access the following display screens in order:

overridden by using the clutch pedal or the brake

pedal during the final 90 second period. The factory

"Service"

default that is programmed for "Allow Idle Shutdown

Override" is "YES". This setting allows the timer to

"Configuration"

be overridden.

b. Record the programmed time for the "Idle

If the timer is activated and the timer is allowed to

Shutdown Time". The "Idle Shutdown Time"

shut down the engine the following event code will

must be between 3 and 1440 minutes. If the

be generated:

"Idle Shutdown Time" is programmed to 0,

then the timer is disabled.

71-01 Idle Shutdown Occurrence (47)

c. Record the current value of the parameter

Code 71-01 records the event and the code does

"Allow Idle Shutdown Override" and the

not indicate an electrical system malfunction or an

parameter "Idle RPM Limit".

electronic system malfunction. Disable the timer by

programming "Idle Shutdown Time" to 0 (Caterpillar

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

Factory Default).

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

Allow the engine to operate at the programmed

The ECM will shut down the engine but not the

low idle.

vehicle electrical system when the time that is

programmed in "Idle Shutdown Timer" expires. The

D. Ensure that all unnecessary loads are turned

"Engine Shutdown Output" can be used to shut

OFF.

down the vehicle electrical system after the time

has expired.

a. Park the vehicle.

b. Ensure that "Vehicle Speed" on the ET status

screen is 0 km/h (0 mph).

c. Ensure that "Engine Speed" on the ET status

screen is at "Low Idle".

d. Ensure that the clutch pedal and the brake

pedal are not depressed.

e. Ensure that the status of the "PTO On/Off

Switch" is OFF.