Low Power/Poor or No Response to Throttle

TM 9-2320-312-24-2

Troubleshooting Section

4. Connect the electronic service tool to the cab

If no smoke is present, there may be a problem

data link connector and check for event code

with the fuel quality or there may be a problem

164-11 injection actuation pressure system fault

with the fuel supply.

. If an 164-11 event code has been logged

recently, refer to Troubleshooting, "Injection

2. Check the fuel quality. Refer to the Truck

Actuation Pressure -Test".

Performance and Driveability Diagnostic Guide,

LEBT3477.

i01857468

3. Check the fuel pressure. Refer to Testing and

Low Power/Poor or No

Adjusting, "Fuel System Pressure - Test".

Response to Throttle

4. Ensure that the fuel system has been primed.

Refer to Testing and Adjusting, "Fuel System -

SMCS Code: 7569

Prime".

5. Check for fuel supply lines that are restricted.

Probable Causes

6. Check the fuel filters.

The probable root causes are listed in order below:

7. If the temperature is below 0 C (32 F), check

Customer Specified Parameters (normal

for solidified fuel (wax).

operation)

8. Check for air in the fuel system. Refer to Testing

Cold Mode operation

and Adjusting, "Air in Fuel - Test".

Torque limit switch

Torque Limit Switch

Electronic system

1. Connect the electronic service tool to the cab

Vehicle speed signal

data link connector.

Power train data link

2. Check the setting for the Customer Parameter

for the "Torque Limit".

Fuel supply

If the "Torque Limit" is programmed below

Air Inlet and exhaust system

2712 Nm (2000 lb ft), check the status screen

for the torque limit switch. Ensure that the status

Malfunction of an individual cylinder

screen indicates that the torque limit switch is

off. If the status of the torque limit switch is

Low injection actuation pressure

on and a "Torque Limit" is programmed, the

system is operating correctly. If the switch that is

connected to this signal input is not switching on

Recommended Actions

and switching off, refer to Troubleshooting, "PTO

Switch Circuit - Test".

Perform the following tests in order:

Low Injection Actuation Pressure

Customer Specified Parameters

1. Check the engine oil level. Engine oil is used to

1. Check Customer Specified Parameters.

activate the high pressure hydraulic pump.

2. Verify that the complaint is not normal operation

2. Ensure that the engine oil meets the

(programmed parameter).

recommendations of the engine manufacturer.

Refer to Operation and Maintenance Manual for

3. Connect the electronic service tool to the cab

further details.

data link connector.

3. Crank the engine and monitor the injection

4. Check the following parameters:

actuation pressure and the output of the injection

actuation pressure control valve. The high

"Rating Number"

pressure oil system is operating properly if the

pressure output is a minimum of 6 MPa (870 psi).

"Top Engine Limit"