U1184 – OBD-II DTC

OBD-II DTC U1184 – SCP (J1850) Invalid or Missing Data for Window Wiper / Washer

DTC U1184 meaning

DTC U1184 refers to a diagnostic trouble code that indicates an issue with the Serial Communication Protocol (SCP) related to the window wiper and washer system. Specifically, it signifies that there is invalid or missing data being transmitted within the network, which can affect the operation of the wipers and washers.

DTC U1184 symptoms

Common symptoms associated with DTC U1184 may include:

• Inoperative windshield wipers
• Washer fluid not dispensing
• Intermittent wiper operation
• Dashboard warning lights illuminated
• Erratic behavior of other electronic components

DTC U1184 causes

Several factors can lead to the triggering of DTC U1184, including:

• Faulty wiper control module
• Damaged wiring or connectors in the wiper circuit
• Corrupted data communication between modules
• Defective body control module (BCM)
• Software issues within the vehicle’s electronic systems

DTC U1184 seriousness

The seriousness of DTC U1184 can vary based on the symptoms experienced. While it may not pose an immediate safety risk, inoperative wipers can significantly impair visibility during adverse weather conditions, making it a concern for safe driving. It is advisable to address this code promptly to ensure proper vehicle operation.

How to diagnose DTC U1184

To diagnose DTC U1184, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC U1184.
2. Check for any additional trouble codes that may provide more context.
3. Inspect the wiper control module and associated wiring for damage or corrosion.
4. Test the wiper control module for proper operation using a multimeter.
5. Examine the body control module for any faults or software issues.
6. Verify the integrity of the SCP communication lines.

How to fix DTC U1184 step-by-step instructions

To fix DTC U1184, follow these steps:

1. Repair or replace any damaged wiring or connectors found during diagnosis.
2. If the wiper control module is faulty, replace it with a new or refurbished unit.
3. Reprogram or update the body control module if software issues are detected.
4. Clear any stored trouble codes using an OBD-II scanner.
5. Test the wiper and washer system to ensure proper functionality.
6. Perform a final scan to confirm that DTC U1184 does not reappear.

How to erase DTC U1184

To erase DTC U1184, 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 trouble codes menu on the scanner.
4. Select the option to clear or erase trouble codes.
5. Confirm the action and wait for the scanner to complete the process.
6. Disconnect the scanner and start the vehicle to verify that the code has been cleared.

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