U1185 – OBD-II DTC

OBD-II DTC U1185 – SCP (J1850) Invalid or Missing Data for Window Wiper / Washer

DTC U1185 meaning

DTC U1185 refers to a diagnostic trouble code indicating “Invalid or Missing Data for Window Wiper / Washer” in vehicles using the SCP (J1850) communication protocol. This code suggests that the vehicle’s onboard diagnostic system has detected an issue with the data being transmitted or received regarding the windshield wiper and washer system. The problem may stem from a malfunctioning component or communication failure within the system.

DTC U1185 symptoms

Common symptoms associated with DTC U1185 may include:

• Windshield wipers not functioning properly
• Washer fluid not spraying
• Inconsistent wiper operation
• Dashboard warning lights illuminated
• Erratic behavior of wiper controls

DTC U1185 causes

Several factors can lead to the triggering of DTC U1185, including:

• Faulty windshield wiper motor
• Defective wiper switch
• Damaged wiring or connectors in the wiper system
• Issues with the Body Control Module (BCM)
• Communication errors within the SCP network

DTC U1185 seriousness

The seriousness of DTC U1185 can vary. While it may not pose an immediate safety risk, it can lead to reduced visibility during adverse weather conditions if the wipers fail to operate correctly. It is advisable to address this issue promptly to ensure proper functionality of the windshield wiper and washer system.

How to diagnose DTC U1185

To diagnose DTC U1185, follow these steps:

• Use an OBD-II scanner to confirm the presence of the U1185 code.
• Check for any additional trouble codes that may provide more context.
• Inspect the windshield wiper motor and switch for visible damage or wear.
• Examine wiring and connectors for signs of corrosion or disconnection.
• Test the Body Control Module (BCM) for proper operation.
• Perform a communication test on the SCP network to identify any faults.

How to fix DTC U1185 step-by-step instructions

To fix DTC U1185, follow these step-by-step instructions:

1. Clear the DTC using an OBD-II scanner.
2. Test the windshield wiper motor and replace it if faulty.
3. Replace the wiper switch if it is not functioning correctly.
4. Repair or replace any damaged wiring or connectors.
5. Check and, if necessary, reprogram or replace the Body Control Module (BCM).
6. Re-scan the system to ensure the DTC does not return.

How to erase DTC U1185

To erase DTC U1185, follow these steps:

• Connect an OBD-II scanner to the vehicle’s diagnostic port.
• Turn the ignition key to the “On” position without starting the engine.
• Access the scanner’s menu and select the option to clear or erase trouble codes.
• Confirm the action and wait for the scanner to complete the process.
• Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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