Chrysler’s Code U1412 is a diagnostic trouble code that indicates a problem with the Powertrain Control Module (PCM) receiving an implausible vehicle speed signal from the Anti-lock Brake (ABS) module. This code can be difficult to diagnose and requires a thorough understanding of the underlying causes and potential solutions. In order to best understand the issue, it is important to look at the possible causes and solutions.
Causes and Solutions for Chrysler Code U1412
| Cause | Solution |
|---|---|
| CAN C BUS OPEN OR SHORTED | Check for an intermittent connection or damaged wiring harness |
| NO POWER TO ANTI-LOCK BRAKE MODULE – MODULE UNPLUGGED OR OPEN FUSE | Check the fuse and module connections |
| POWERTRAIN CONTROL MODULE (PCM) DEFECT | Replace the PCM and reprogram it with the latest software |
| ABS MODULE MALFUNCTION | Replace the ABS module and update the software |
CAN C BUS Open or Shorted
Chrysler Code U1412 can occur when the Controller Area Network (CAN) bus is open or shorted. This is a communication issue between the PCM and the ABS module. When this happens, it can cause the PCM to receive an incorrect or implausible signal from the ABS module. To fix this, it is important to inspect the wiring harness for any loose or damaged connections. If the wiring is okay, it may be necessary to replace the CAN bus connector.
No Power to Anti-Lock Brake Module – Module Unplugged or Open Fuse
If the ABS module is not receiving power, it can cause Chrysler Code U1412. This could be due to a blown fuse or an unplugged module. It is important to check the fuse to make sure it is not blown, and then make sure that the module is properly connected. If the fuse is okay and the module is connected, it may be necessary to replace the fuse or the module.
Powertrain Control Module (PCM) Defect
If the PCM is defective, it can cause Chrysler Code U1412. The PCM may need to be replaced and reprogrammed with the latest software. It is important to make sure that the PCM is compatible with the vehicle and that it is programmed correctly. This can help ensure that the PCM and ABS module are communicating correctly.
ABS Module Malfunction
In some cases, the ABS module may be malfunctioning, causing Chrysler Code U1412. If this is the case, it is important to replace the ABS module and update the software. This will help ensure that the PCM and ABS module are communicating properly.
Conclusion
Chrysler Code U1412 can be a difficult code to diagnose. It is important to understand the underlying causes and potential solutions. The most common causes are CAN C bus open or shorted, no power to the ABS module, defective PCM, and ABS module malfunction. By understanding the causes and solutions for Chrysler Code U1412, it can help make the diagnosis and repair process much easier.
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