The Engine Control Module (ECM) detects the following conditions:
•The signal frequency from the accelerator pedal position sensor is less than 150 Hz or the signal frequency is greater than 1050 Hz for more than two seconds.
•The ECM has been powered for at least three seconds.
Probable Causes:
1) ECM Connection/Harness
2) Accelerator Position Sensor
3) Accelerator Position Sensor Harness
4) ECM Failure
The Engine Control Module (ECM) detects the following conditions:
•The primary engine speed/timing signal was lost and then returned within one second.
•The engine has been running for more than three seconds.
•The engine speed did not pass through the 350 to 500 rpm range.
•Battery voltage is greater than 9 VDC prior to the short or open circuit condition.
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
Conditions Which Generate This Code:
The engine speed exceeded 2600 rpm for more than one second.
This is not a diagnostic code, but a warning code. Talk to driver to see why this happened.
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 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