U1194 – OBD-II DTC

OBD-II DTC U1194 – SCP (J1850) Invalid or Missing Data for Mirrors

DTC U1194 meaning

DTC U1194 refers to a diagnostic trouble code indicating “Invalid or Missing Data for Mirrors” in vehicles equipped with the SCP (Standard Corporate Protocol) communication system, specifically using the J1850 protocol. This code suggests that the vehicle’s onboard diagnostic system has detected an issue with the data being transmitted or received regarding the mirror control systems.

DTC U1194 symptoms

Common symptoms associated with DTC U1194 may include:

• Inoperable side mirrors
• Mirror adjustment controls not functioning
• Warning lights on the dashboard
• Other electronic features related to mirrors may also be affected

DTC U1194 causes

Several factors can lead to the triggering of DTC U1194, including:

• Faulty mirror control module
• Wiring issues, such as damaged or corroded connectors
• Malfunctioning sensors within the mirror assembly
• Software glitches in the vehicle’s control modules
• Issues with the SCP communication network

DTC U1194 seriousness

The seriousness of DTC U1194 can vary. While it may not pose an immediate safety risk, it can affect the functionality of the mirrors, which are essential for safe driving. Ignoring this code may lead to further electrical issues or complications with other systems in the vehicle.

How to diagnose DTC U1194

To diagnose DTC U1194, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the U1194 code.
2. Check for any additional trouble codes that may provide more context.
3. Inspect the wiring and connectors related to the mirror control system for damage or corrosion.
4. Test the mirror control module for proper operation.
5. Verify the functionality of the mirror adjustment switches.
6. Check the SCP communication network for faults.

How to fix DTC U1194 step-by-step instructions

To fix DTC U1194, follow these steps:

1. Repair or replace any damaged wiring or connectors found during diagnosis.
2. If the mirror control module is faulty, replace it with a new or refurbished unit.
3. Ensure that all connections are secure and free of corrosion.
4. Update the vehicle’s software if necessary to resolve any glitches.
5. Test the mirror adjustment controls to confirm they are functioning correctly.
6. Clear the DTC using an OBD-II scanner and perform a test drive to ensure the code does not return.

How to erase DTC U1194

To erase DTC U1194, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn the ignition key to the “On” position without starting the engine.
3. Access the scanner’s menu and select the option to clear or erase trouble codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to check if the code reappears.

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