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 correctly3) Vehicle speed sensor4) Vehicle speed sensor wiring5) ECM Connection/Harness6) Speedometer failure7) ECM Failure CAT 3406E (Prefix 5DS or 1LW) Fault Code: 36 PID: 84 SPN: FMI: 2 Vehicle Speed signal invalid CAT 3406E (Prefix 5DS or 1LW) Fault Code:...

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/Harness2) If code 232-3 or 232-4 (5 Volt Supply voltage codes) are active, troubleshoot those instead3) Temperature sensor failure4) Temperature sensor harness5) ECM Failure CAT 3406E (Prefix 5DS or 1LW) Fault Code: 36 PID: 84 SPN: FMI: 10 Vehicle Speed signal rate of change CAT 3406E (Prefix 5DS or 1LW)...

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/Harness2) If code 232-3 or 232-4 (5 Volt Supply voltage codes) are active, troubleshoot those instead3) Temperature sensor failure4) Temperature sensor harness5) ECM Failure CAT 3406E (Prefix 5DS or 1LW) Fault Code: 38 PID: 105 SPN: FMI: 3 Intake Manifold Air Temperature voltage high CAT 3406E (Prefix 5DS or 1LW) Fault Code: 36 PID: 84 SPN: FMI: 10...

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 incorrectly2) Speedometer is not reading engine speed correctly CAT 3406E (Prefix 5DS or 1LW) Fault Code: 38 PID: 105 SPN: FMI: 4 Intake Manifold Air...

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 failure3) Speed/timing sensor harness failure CAT 3406E (Prefix 5DS or 1LW) Fault Code: 41 PID: 84 SPN: FMI: 0 Vehicle Overspeed Warning CAT 3406E (Prefix 5DS or 1LW) Fault Code: 38 PID: 105 SPN: FMI: 4 Intake Manifold Air Temperature voltage low CAT 3406E (Prefix 5DS or 1LW) Fault Code: 38 PID: 105 SPN:...