When your vehicle’s check engine light illuminates, it can be alarming. One of the most commonly lit codes is the Chrysler U0103, which indicates the loss of communication between the Electric Gear Shift Module and the Powertrain Control Module. This code can be caused by a variety of malfunctions, such as a CAN C bus failure, an Electric Gear Shift Module failure, or a PCM failure. Let’s take a look at some of the causes and solutions associated with this code.
Causes and Solutions for Chrysler U0103 Code
| Cause | Solution |
|---|---|
| CAN C Bus failure open or shorted | Check CAN C bus wiring and connectors. |
| Electric gear shift module has failed | Replace the Electric Gear Shift Module. |
| PCM has failed | Replace the PCM. |
| Voltage drop during gear shift | Test the voltage and replace the battery if necessary. |
CAN C Bus Failure
When the CAN C Bus fails, it can cause the Chrysler U0103 code to be triggered. The CAN C bus is responsible for sending signals between the Electric Gear Shift Module and the Powertrain Control Module. To diagnose a CAN C Bus failure, you should check the wiring and connectors associated with the bus. If any of the wiring or connectors are found to be faulty, they should be repaired or replaced.
Electric Gear Shift Module Failure
When the Electric Gear Shift Module fails, it can cause the Chrysler U0103 code to be triggered. This module is responsible for controlling the shifting of the vehicle’s transmission. If the module has failed, it should be replaced.
PCM Failure
The Powertrain Control Module (PCM) is responsible for controlling the engine and transmission. If the PCM has failed, it can cause the Chrysler U0103 code to be triggered. The PCM should be replaced if it has failed.
Voltage Drop During Gear Shift
When the voltage drops during a gear shift, it can cause the Chrysler U0103 code to be triggered. To diagnose this issue, you should test the voltage of the vehicle’s battery. If the voltage is low, the battery should be replaced.
Conclusion
The Chrysler U0103 code can be caused by a variety of malfunctions, such as a CAN C bus failure, an Electric Gear Shift Module failure, or a PCM failure. To diagnose and repair these issues, you should check the wiring and connectors associated with the CAN C bus, replace the Electric Gear Shift Module, replace the PCM, and test the voltage of the vehicle’s battery. By following these steps, you can successfully diagnose and repair the Chrysler U0103 code.
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