Driver Questionnaire Response

TM 9-2320-312-24-2

Troubleshooting Section

i01641542

Driver Questionnaire

Response

SMCS Code: 1000; 7569

Table 143

1. If the Check Engine Lamp turned on there will be a logged diagnostic code. Refer to Troubleshooting, "Possible

Performance Effect of Active Diagnostic Codes" in order to determine if the driver's indicated symptoms agree with

the symptoms that are associated with the diagnostic code. If the driver's symptoms do not match the symptoms of the

diagnostic code, troubleshooting the diagnostic code will not correct the problem. Review the snapshots that are associated

with each diagnostic code in order to determine the operating conditions of the engine during the occurrence of the problem.

Try to duplicate these conditions. If there are not any logged diagnostic codes, check the ECM battery connections. Refer to

Troubleshooting, "Ignition Key Switch Circuit and Battery Supply Circuit - Test".

2. If the problem is easily repeatable, take the vehicle for a test drive while ET is connected to the cab data link connector. Note

the conditions when the problem occurs. The operator should be prepared to take snapshot data by using ET or the Cruise

Control Set/Resume switches. Ensure that you operate the vehicle after correcting the problem. During vehicle operation,

duplicate the operating conditions before releasing the vehicle in order to verify that the problem has been corrected.

3. If the vehicle has been to other shops for the same problem, call the other shops in order to determine the type of work that

has been done. Avoid replacing the same components again, unless you are absolutely sure that the components are the

problem. If a component has recently been changed, it is unlikely that the component will fail again.

4. Troubleshoot the reason that the engine will not start. Repair the reason that the engine does not start. When you

repair the reason that the engine did not start you should repair the reason that the engine shut down. If the engine shut

down completely, check the ECM battery connections, the ground connections, the fuel system, the fuel, the crankshaft

position sensor and the camshaft position sensor. If the engine will not restart, refer to Troubleshooting, "Engine Cranks

but Will Not Start".

5. If the problem is easily repeatable, refer to Troubleshooting, "Engine Misfires, Runs Rough or Is Unstable".

If the problem is not easily repeatable, refer to Troubleshooting, "Intermittent Low Power or Power Cutout".

6. If other devices on the vehicle are affected, something is wrong with the vehicle wiring. Refer to Troubleshooting, "Ignition

Key Switch Circuit and Battery Supply Circuit Test" for information on inspecting the ECM battery connections.

7. Operate the engine under similar load conditions. Check the low pressure fuel lines for restrictions. Also check the

fuel/water separator and the fuel tanks for foreign objects that are blocking the fuel supply.

8. Operate the engine at this temperature. Attempt to duplicate the problem.

9. When possible, troubleshoot the problem in this temperature range.

10. If the problem seems to occur during the rain or a washing, thoroughly inspect the connectors for moisture. Refer to

Troubleshooting, "Electrical Connectors - Inspect".

11. If the problem occurs at a specific vehicle speed, check the parameters that affect vehicle speed in order to verify that the

parameters are programmed close to the vehicle speed of the occurrence of the problem. Check the following parameters:

"Vehicle Speed Limit"

"VSL Protection"

"Low Cruise Control Speed Set Limit"

"High Cruise Control Speed Set Limit"

"Idle Vehicle Speed Limit"

"PTO Vehicle Speed Limit"

"Engine/Gear Speed Limit"

Set each parameter to the maximum value one at a time and verify that the problem is corrected.

12. If the vehicle kicks out of cruise control mode, idle mode or PTO mode and it can be duplicated, check the ET status

screen. Check the status of the Cruise Kickout, the Idle Kickout or the PTO Kickout. If the problem can not be duplicated,

inspect the vehicle speed circuit, the service brake circuit and the clutch switch circuit and switch adjustment, the circuit for

the neutral switch and the circuits for the cruise/idle/pto switches, as required.

13. Check for logged diagnostic codes that are associated with the accelerator pedal position sensor. Refer to

Troubleshooting, "Accelerator Pedal (Throttle) Position Sensor Circuit - Test".

14. If the problem occurs at a specific engine rpm, check the "VSL Protection", the "Idle rpm Limit", the "Top Engine Limit", the

"PTO Top Engine Limit" and the Progressive Shift Parameters. These parameters are programmable. Set each parameter

to the maximum value one at a time and verify that the problem is corrected.