Intermittent Cruise Control, Idle, or PTO Kickout

TM 9-2320-312-24-2

Troubleshooting Section

Air Inlet Restriction

2. Check for diagnostic codes that are related to

the coolant temperature circuit.

Check the Air Inlet System for restrictions. Refer

3. Monitor the status of the coolant temperature

to Testing and Adjusting, "Air Inlet and Exhaust

sensor on the status screen of the Caterpillar

System - Inspect".

Electronic Technician (ET). If an active open or

a short circuit diagnostic code is detected, refer

i01641989

to Troubleshooting, "Engine Temperature Sensor

Intermittent Cruise Control,

Open or Short Circuit - Test".

Idle, or PTO Kickout

Hydraulic Electronic Unit Injector

SMCS Code: 1900; 7569

1. Ensure that the Hydraulic Electronic Unit Injector

connector (J300/P300) is fully connected and

Probable Causes

ensure that the Hydraulic Electronic Unit Injector

connector (J300/P300) is free of corrosion.

The probable root causes are listed in order below:

2. Ensure that the ECM engine harness connector

Cruise control, idle control, and PTO control status

(J2/P2) is fully connected and ensure that the

engine harness connector (J2/P2) is free of

A clutch pedal position switch that is incorrectly

corrosion.

adjusted

3. Connect ET to the cab data link connector. Use

Malfunctioning on/off switch for cruise control and

the Cylinder Cutout Test. Access the Cylinder

idle control

Cutout Test by selecting the "Diagnostic Menu"

and the "Diagnostics Test Menu". Run the

Malfunctioning switch for service brake pedal

Cylinder Cutout Test in order to disable each

position

cylinder. Disabling each cylinder allows the

technician to isolate the misfiring cylinders.

Malfunctioning transmission neutral switch

If the misfiring cylinder can be isolated to

Vehicle speed circuit problem

a specific cylinder, refer to Troubleshooting,

"Injector Solenoid Circuit - Test".

Battery power or ground to the ECM

Combustion Problem

Recommended Actions

Check for combustion problems.

Perform the following diagnostic procedures in

order:

Examples of combustion problems are shown in the

following list:

ET Status Screen

Outside temperatures are too cold.

1. Connect Caterpillar Electronic Technician (ET) to

Mechanical problem

the cab data link connector. Check the status

screen for the last item that caused the kickout

Intake Air Heater

for the cruise control, the idle control or the PTO

control.

1. Inspect the wiring for the intake air heater for

Note: ET will only provide access to the last cause

damage or bad connections.

of the kickout. If the ECM is powered down and

the ECM is powered up, the display on ET will be

2. Connect ET to the cab data link connector.

blank. The ECM is powered down when the ignition

key switch is turned to the OFF position. It may

3. Check the coolant temperature sensor and

be necessary to take the vehicle for a test drive in

the intake air temperature sensor for proper

order to repeat the problem. Check ET before the

operation.

ECM is turned off by the keyswitch.

4. Check the element inside the intake air heater.

If ET indicates "Switch Turned Off", go to Step 2.

5. Check the inlet air heater relay for proper

If ET indicates "Brake", "Clutch", or "Neutral" go

operation.

to Step 3.