CAT

The ECM detects the following conditions:

•The vehicle speed signal changes more than 5 MPH on eight consecutive readings in three seconds.
•The engine speed is greater than the programmed “VSL Protection” minus 100 rpm.
•The “VSL Protection” parameter is programmed to a value that is less than 2120 rpm.

Probable Causes:

1) Fuel system restriction (Uncommon, but possible)
2) If speedometer is not accurate, then ECM is not programmed correctly
3) Vehicle speed sensor
4) Vehicle speed sensor wiring
5) ECM Connection/Harness
6) Speedometer failure
7) ECM Failure

The ECM detects the following conditions:

•The vehicle speed signal indicates a constant MPH.
•The “VSL Protection” parameter is programmed to a value that is less than 2120 rpm.

Probable Causes:

1) Fuel system restriction (Uncommon, but possible)
2) If speedometer is not accurate, then ECM is not programmed correctly
3) Vehicle speed sensor
4) Vehicle speed sensor wiring
5) ECM Connection/Harness
6) Speedometer failure
7) ECM Failure

The Engine Control Module (ECM) detects the following conditions:

•The vehicle speed signal indicates that vehicle speed is greater than 127.5 MPH for more than two seconds.
•The “VSL Protection” parameter is programmed to a value that is less than 2120 rpm.

Probable Causes:

1) Fuel system restriction (Uncommon, but possible)
2) If speedometer is not accurate, then ECM is not programmed correctly
3) Vehicle speed sensor
4) Vehicle speed sensor wiring
5) ECM Connection/Harness
6) Speedometer failure
7) ECM Failure

The Engine Control Module (ECM) detects the following conditions:

•The signal voltage from the intake manifold air temperature sensor is greater than 4.9 VDC for more than eight seconds.
•Engine coolant temperature is above −10 °C (15.0 °F).
•The ECM has been powered for at least two seconds.

Probable Causes:

1) ECM Connection/Harness
2) If code 232-3 or 232-4 (5 Volt Supply voltage codes) are active, troubleshoot those instead
3) Temperature sensor failure
4) Temperature sensor harness
5) ECM Failure

The Engine Control Module (ECM) detects the following conditions:

•The signal voltage from the intake manifold air temperature sensor is less than 0.2 VDC for more than eight seconds.
•The ECM has been powered for at least two seconds.

Probable Causes:

1) ECM Connection/Harness
2) If code 232-3 or 232-4 (5 Volt Supply voltage codes) are active, troubleshoot those instead
3) Temperature sensor failure
4) Temperature sensor harness
5) ECM Failure

The Engine Control Module (ECM) detects one of the following conditions:

•The “Soft Vehicle Speed Limit” parameter is programmed to “No” and the vehicle speed exceeds the programmed “Vehicle Speed Limit” by more than 10 MPH for more than 20 seconds.
•The “Soft Vehicle Speed Limit” parameter is programmed to “Yes” and the vehicle speed exceeds the programmed “Vehicle Speed Limit” by more than 15 MPH for more than 20 seconds.

Probable Causes:

1) ECM Programmed incorrectly
2) Speedometer is not reading engine speed correctly

The Engine Control Module (ECM) detects the following conditions:

•A timing calibration has been successfully completed.
•The primary engine speed/timing sensor and the secondary engine speed/timing sensor are off by more than three degrees.

Probable Causes:

1) Cluster gear is not properly aligned or it has damage
2) If cylinder head was removed, backlash for camshaft be out of spec
3) Engine speed sensors not installed properly

The Engine Control Module (ECM) detects the following conditions:

•A timing calibration has never been performed on a new ECM or the timing is off by more than three degrees.

Probable Causes:

1) Speed/timing sensor not calibrated properly (Need CAT software to do this)
2) Speed/timing sensor failure
3) Speed/timing sensor harness failure

The Engine Control Module (ECM) detects the following conditions:

• Oil pressure drops below factory limits for more than 8 seconds

Probable Causes:

1) Low oil level
2) Low oil pressure sensor
3) Low oil pressure sensor harness
4) If codes also active for barometric, atmospheric pressure, or boost pressure, repair those first
5) Verify 5V to all pressure sensors
6) Manually check engine for oil pressure to verify sensor is performing correctly
7) ECM connection/harness