HOSE AS 1340747 - Caterpillar

Probable Causes
The probable root causes are listed in order below:
Diagnostic codes
Customer specified parameters (normal operation)
Cold mode
Electronic system problem
Fuel supply
Air intake system or exhaust system
Leakage in air-to-air aftercooler coreRecommended Actions
Check for diagnostic codes.
Connect the Caterpillar Electronic Technician (ET) to the data link connector.
Turn the key switch to the ON position.
Check for active diagnostic codes and logged diagnostic codes. Certain diagnostic codes will limit the vehicle speed to 45 mph.
Troubleshoot all diagnostic codes before continuing with this procedure.
Check customer specified parameters.
Verify that the complaint is not due to normal operation (programmed parameter).
Access the "Configuration" screen on Cat ET.
Check the following parameters:
"Vehicle Speed Limit"
"Soft Vehicle Speed Limit"
"Lower Gears Engine RPM Limit"
"Intermediate Gears Engine RPM Limit"
"Gear Down Protection Engine RPM Limit"
"VSL Protection"
"Top Engine Limit"
Incorrect programming of the Vehicle Speed calibration (ppm).
"PTO Top Engine Limit" with the PTO On/Off Switch turned ON.
"Maximum PTO Vehicle Speed" with the PTO On/Off Switch turned ON.
Set each parameter to the parameter's maximum value one at a time and determine whether the problem is corrected. Note: The "Soft Vehicle Speed Limit" will not allow the vehicle to achieve the programmed VSL under all engine load conditions. Programming the "Soft Vehicle Speed Limit" to NO may be required to eliminate the complaint.
Check cold mode operation. Note: This is normal operation if the problem occurs only after start-up in cold weather.
Check the status screen on Cat ET. "Cold Mode" is indicated in the upper corner of any status screen when cold mode is active.
Check for an electronic system problem.
Monitor the fuel position, the "Rated Fuel Limit", and the "FRC Fuel Limit". While the vehicle is operating under full load, the parameters should meet the following conditions:
The fuel position is equal to the "Rated Fuel Limit".
The fuel position is less than the "FRC Fuel Limit".If the fuel position is equal to the "Rated Fuel Limit" and the fuel position is less than the "FRC fuel Limit", the electronics are operating correctly. Go to Step 6.
If the fuel position is not equal to the "Rated Fuel Limit" and/or the fuel position is not less than the "FRC Fuel Limit", perform the following tests in order:
When the engine is OFF, turn the key switch to the ON position. Check the boost pressure on Cat ET. When the engine is OFF, the boost pressure should be 0 kPa (0 psi).
Monitor the status of the accelerator pedal position sensor. Operate the engine at high idle with the vehicle in Neutral. If the engine can not reach the programmed "Top Engine Limit", check the duty cycle for the accelerator pedal position sensor in order to ensure that the duty cycle is within calibration (75 to 90 Percent at high idle).If the accelerator pedal position is unstable, check the duty cycle of the accelerator pedal position sensor. Check the duty cycle by slowly operating the accelerator pedal in order to verify that the duty cycle is within calibration. The accelerator pedal position sensor is within calibration when both of the following conditions are met:
10 to 22 percent