Skip to content
Tahoe / Yukon Service Manual

DTC U3000 (B174W Frontview Camera - Windshield)

Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptors DTC U3000 41 Control Module General Checksum DTC U3000 42 Control Module General Memory Failure DTC U3000 44 Control Module Data Memory Failure DTC U3000 49 Control Module Internal Electronic Failure DTC U3000 51 Control Module Not Programmed DTC U3000 53 Control Module Deactivated DTC U3000 54 Control Module Missing Calibration DTC U3000 55 Control Module Not Configured DTC U3000 56 Control Module Invalid/Incompatible Configuration Diagnostic DTC U3000 57 Control Module Invalid/Incompatible Software Component Circuit/System Description The B174W Front View Camera – Windshield performs a routine of self-check functions to determine if it is a normal operating state. Conditions for Running the DTC Ignition ON Conditions for Setting the DTC The B174W Front View Camera – Windshield has determined an internal software or hardware fault exists. Action Taken When the DTC Sets Any system that utilizes the B174W Front View Camera – Windshield is disabled. Conditions for Clearing the DTC The condition for setting the DTC is no longer present. Diagnostic Aids Inspect the B174W Front View Camera – Windshield, on the windshield near the inside rearview mirror, to make sure it is attached properly to the windshield. Visually inspect the vehicle for any aftermarket add on equipment like bug deflectors, windshield tint/banners, grille emblems, push bars, license plates, etc. These items could block the camera’s view. Question the customer to see if this concern started after the installation of the aftermarket equipment. Remove any aftermarket items and retest system for proper operation. Reference Information Schematic Reference Driver Assistance Systems Schematics Connector End View Reference Master Electrical Component List Description and Operation Active Safety System Description and Operation Forward Collision Alert Description and Operation Lane Keep Assist Description and Operation Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References for scan tool information Circuit/System Testing DTC U3000 with failure type byte 41, 42, 44, 49, 51, or 53

  1. Verify that the DTC is not set with FTB 42, 44, 45, 46, 47, 48, or 49. ⇒ If the DTC is set Replace the B174W Frontview Camera - Windshield. ⇓ If the DTC is not set
  2. All OK. DTC U3000 with failure type byte 54, 55, 56, or 57
  3. Ignition ON.
  4. Verify that the DTC is not set with FTB 46, 51, or 57 ⇒ If the DTC is set 2.1. Program the B174W Frontview Camera - Windshield. 2.2. Verify the DTC does not reset. ⇒ If the DTC resets, replace the B174W Frontview Camera - Windshield. ⇓ If the DTC does not reset 2.3. All OK. ⇓ If the DTC is not set
  5. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair. Control Module References for control module replacement, programming, and setup.