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U1110 - FAULT CODE - OBD2

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    Description of DTC code U1110 Generic

    The PCM (Powertrain Control Module) receives an electrical signal informing it of the vehicle speed, the medium used to transmit this data is the Controller Area Network (CAN) C bus from the Anti-Lock Brake Module.

    When the DTC U1110 OBD2 code is stored, it is because the PCM/ECM did not receive the vehicle speed signal from the Anti-lock Brake Module.

    How does the U1110 Fault Code work?

    This is a particular manufacturer’s fault code. And it can be set for several different problems, depending on what the manufacturer wants to set it for. Bus communication systems might or might not be fault-tolerant, meaning that any kind of intermittent/loose connection between each controller could end the communication itself. When these controllers cannot communicate with each other at any time while the power switch is on, the code U1110 appears. It is important to understand this procedure in order to be able to detect the source of the fault and repair it.

    Symptoms of fault code U1110 Generic

    • Check Engine lamp illuminated.
    • Flashing fault during engine start.

    Causes of OBD2 U1110 Generic

    U1110 OBDII diagnostic code is set by the following:

    • Anti-Lock Brake System Module wiring may be faulty.
    • ABS Module electrical connections may be in poor condition.
    • The Anti-Lock Brake System Module may have been damaged.
    • PCM may have deficiencies.

    Possible solutions of the DTC code U1110 Generic

    In order to troubleshoot the U1110 OBD2 fault code consider the following:

    • To start the diagnosis, consult the TSB (Technical Service Bulletins).
    • Check that the wiring of the Anti-Lock Brake System Module is not damaged by burns or wear. If one of these conditions is detected, make the appropriate repairs or changes.
    • Check the electrical connections of the controllers related to the code for good condition. In certain cases, exchanging the battery while the switch is on may cause the code to set. Correct it as required.
    • Before performing a diagnostic or repair to one of the controllers, we recommend that you visit an advanced automotive center, taking into account the levels of complexity required.

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