U1170 – OBD-II DTC

OBD-II DTC U1170 – SCP (J1850) Invalid or Missing Data for Cellular Phone / Paging System

DTC U1170 meaning

DTC U1170 refers to a diagnostic trouble code indicating an issue with the Serial Communication Protocol (SCP) related to the cellular phone or paging system in a vehicle. This code signifies that the data being transmitted or received is either invalid or missing, which can affect the functionality of the communication systems within the vehicle.

DTC U1170 symptoms

Common symptoms associated with DTC U1170 may include:

• Inoperable cellular phone or paging system
• Communication errors with other modules
• Warning lights on the dashboard
• Intermittent connectivity issues

DTC U1170 causes

Several factors can lead to the triggering of DTC U1170, including:

• Faulty wiring or connectors in the SCP network
• Malfunctioning cellular phone or paging module
• Software issues within the vehicle’s control modules
• Corrosion or damage to the communication lines

DTC U1170 seriousness

The seriousness of DTC U1170 can vary. While it may not affect the vehicle’s drivability, it can lead to a lack of communication between critical systems, potentially impacting safety features and convenience functions. It is advisable to address this code promptly to ensure all systems are functioning correctly.

How to diagnose DTC U1170

To diagnose DTC U1170, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the U1170 code.
2. Inspect the wiring and connectors related to the SCP network for any visible damage or corrosion.
3. Check the functionality of the cellular phone or paging module.
4. Review the vehicle’s service history for any recent repairs that may have affected the SCP.
5. Perform a network test to ensure all modules are communicating properly.

How to fix DTC U1170 step-by-step instructions

To fix DTC U1170, follow these steps:

1. Repair or replace any damaged wiring or connectors found during the inspection.
2. Replace the faulty cellular phone or paging module if necessary.
3. Update the software in the vehicle’s control modules if outdated.
4. Clear any corrosion from connectors and ensure a secure connection.
5. Re-scan the system to verify that the DTC has been resolved.

How to erase DTC U1170

To erase DTC U1170, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Access the trouble codes menu on the scanner.
3. Select the option to clear or erase codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and take the vehicle for a test drive to ensure the code does not return.

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