0128-04 Secondary Fuel Level Sensor Short Circuit (44)

129

TM 9-2320-312-24-2

Troubleshooting Section

If the parameter "Primary Fuel Tank Size" is not

i01765720

programmed and a diagnostic code is active for the

0164-00 Injection Actuation Pr

primary fuel level sensor, the ECM will broadcast

Out of Range (17)

an error code over the J1939 data link. The ECM

will also broadcast the fuel level as 0 over the ATA

data link.

SMCS Code: 1925-038

Service Tool Display or Lamps The Caterpillar

Conditions Which Generate This Code:

Electronic Technician (ET) will display "DIAG" next

to "Secondary Fuel Level"on the status screen while

The ECM detected all of the following conditions:

the diagnostic code is active.

The ECM has been powered for at least three

Perform the following diagnostic procedure: "Fuel

seconds.

Level Sensor Circuit - Test"

The diagnostic fault codes for the +5 V sensor

Results:

supply are not active.

OK STOP.

The diagnostic fault codes for the injection

actuation pressure sensor are not active.

i01616895

Cold Mode is not active.

0128-04 Secondary Fuel Level

The injection actuation pressure is greater than

Sensor Short Circuit (44)

26.5 MPa (3844 psi) for 6 seconds.

SMCS Code: 1408-081; 7483-038-NS

Note: The diagnostic code indicates a mechanical

problem. The ECM and the electronic control system

Conditions Which Generate This Code:

is operating correctly.

This diagnostic code is used only by GMT-560

System Response:

applications.

Electronic System Response The ECM limits

The Secondary Fuel Level signal voltage is below

power output to 89.5 kW (120.0 hp) and the vehicle

the acceptable range for more than 10 seconds.

speed is limited to 73 km/h (45 mph).

System Response:

Service Tool Display or Lamps Caterpillar

Electronic Technician (Cat ET) will display "0%" next

Electronic System Response If the parameter

to "Injector Output %" on the status screen while

"Primary Fuel Tank Size" is programmed and a

the diagnostic code is active. The check engine

diagnostic code for the primary fuel level sensor is

lamp will illuminate.

not active, the ECM will use the primary fuel level

sensor to determine the fuel level.

Engine Response The engine will be low on power

and the vehicle speed will be limited.

If the parameter "Primary Fuel Tank Size" is not

programmed and a diagnostic code is active for the

Note: The problem may only exist at operating

primary fuel level sensor, the ECM will broadcast

temperature.

an error code over the J1939 data link. The ECM

will also broadcast the fuel level as 0 over the ATA

Troubleshooting:

data link.

Perform the following diagnostic procedure:

Service Tool Display or Lamps The Caterpillar

"Injection Actuation Pressure - Test"

Electronic Technician (ET) will display "DIAG" next

to "Secondary Fuel Level"on the status screen while

Results:

the diagnostic code is active.

OK STOP.

Perform the following diagnostic procedure: "Fuel

Level Sensor Circuit - Test"

Results:

OK STOP.