What does ECU 128 mean on a Freightliner?
What does ECU 128 mean on a Freightliner?
not a fault code
What does voltage below normal mean?
FMI 04 – Voltage below normal or short to a circuit with a lower voltage. The FMI code 04 is similar to the FMI code 03. However, the FMI code 04 indicates that the voltage values are below acceptable values. The appearance of the FMI code 04 is most often associated with a malfunction of the signal circuits.
What is FMI code?
The FMI is used along with the SPN to provide specific information that relates to a diagnostic trouble code (DTC). The FMI may indicate that a problem with an electronic circuit or an electronic component has been detected.
What does shorted to low source mean?
What is shorted to low source? This means that a sensor voltage is out of range which could be the result of a few different occurrences such as a bad sensor, a broken wire, a pushed out pin in a connector, or a connector becoming unplugged.
How do you diagnose a short circuit?
The first thing you’ll need to do to find a short circuit is to look for physical signs. This may include visible burns or metal on wires, burning smells, or flickering lights. Once you’ve identified a potential short, use your multimeter to confirm the voltage by setting it to resistance or continuity setting.
How do you test for grounding?
You can use a multimeter to test your outlets for proper grounding.
- Connect the multimeter’s probes to the main body of the meter.
- Turn the multimeter to the highest AC voltage range available.
- Insert the two test leads into the hot and neutral parts of the outlet.
- Remove the black lead and put it in the ground outlet.
What causes PCM failure?
PCMs typically fail for one of two reasons: voltage overloads (often due to a short in a solenoid or actuator circuit) or environmental factors (corrosion, thermal stress or vibration). If the shorted solenoid or actuator isn’t found and repaired, the voltage overload it creates may damage the replacement PCM, too.
Does disconnecting battery reset computer?
However, disconnecting the battery will not only erase diagnostic trouble codes but also erase drivability, security and radio codes in many vehicles. Locate any codes and have them and the drivability learning procedures on hand before disconnecting the battery.
How long does the battery have to be disconnected to reset the computer?
15 minutes