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Tahoe / Yukon Service Manual

DTC B1B9D

Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions DTC Descriptor DTC B1B9D Front Vision Camera Low Voltage Differential Signaling Low Voltage Differential Signaling Signal (+) Symptom Byte Information: Symptom Byte List Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performanc
Coax — Camera Video Signal Front Vision Camera to A11 Radio A11 Radio = B1B9D 11 or 1 A11 Radio = B1B9D 13 or 1 1 A11 Radio = B1B9D 02, 26, 4B or 1
Coax — Camera Video Signal A11 Radio to P16 Instrument Panel Cluster Control Module A11 Radio = B1B9D 2F or 1 A11 Radio = B1B9D 2F or 1 A11 Radio = B1B9D 2F or 1 A11 Radio = B1B9D 2F or 1
1. Front vision camera image distorted or blue screen

Circuit/System Description The A11 Radio is connected to the B174W Front View Camera - Windshield via a shielded coaxial cable. The coaxial cable provides power for the camera and also carries the video image from the camera to the A11 Radio for processing. Conditions for Running the DTC Ignition » On / Vehicle » In Service Mode Conditions for Setting the DTC DTC B1B9D 02, 11, 13 The A11 Radio has detected a camera signal failure DTC B1B9D 26 The A11 Radio has detected the camera signal rate of change is below a predetermined threshold DTC B1B9D 2F The A11 Radio has detected an erratic camera signal DTC B1B9D 4B The A11 Radio has detected the camera is over temperature Actions Taken When the DTC Sets Service Camera message = On Conditions for Clearing the DTC The conditions for setting the DTC no longer exist. Diagnostic Aids The following conditions could cause component performance issues: B174W Front View Camera - Windshield Ambient Light Intensity — High /Low Camera Blocked — Debris /Ice /Mud /Snow Temperature — High /Low An open in the shield of the video signal circuit can cause a distorted screen. If the condition is intermittent or cannot be duplicated, disconnect the connectors and add dielectric grease or lubricant (Nyogel 760G or equivalent, meeting GM specification 9986087). This procedure may correct the high resistance condition due to terminal fretting corrosion. Reference Information Schematic Reference Image Display Camera Schematics Connector End View Reference Master Electrical Component List Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References Special Tools EL-52552 COAX FAKRA CABLE ADAPTER KIT Equivalent regional tools: Special Tools Circuit/System Verification

  1. Perform the following visual inspections: Misalignment of the components: B174W Front View Camera - Windshield Visible Damage Dirty ⇒ If a condition exists » Repair or replace as necessary ⇓ If none of the conditions exists
  2. Refer to: Circuit/System Testing Circuit/System Testing Circuit/System Testing DTC B1B9D 02, 11, 13, 26
  3. Verify the augmented reality LVDS video cable is properly connected at the B174W Front View Camera - Windshield , A11 Radio , and in-line connections; and there is no damage to the cable or connections. ⇒ If connection problems or cable damage is noted Perform the appropriate repair or replacement to correct any issues ⇓ If no connection problems or cable damage is noted
  4. Replace the LVDS cable between the A11 Radio X4 and the B174W Front View Camera - Windshield harness connector X2.
  5. Activate the Augmented Reality system.
  6. Verify the augmented reality image displays properly. ⇒ If the image displays properly All OK. ⇓ If the enhanced image does not display properly
  7. Replace the B174W Front View Camera - Windshield .
  8. Activate the Augmented Reality system.
  9. Verify the augmented reality view image displays properly. ⇒ If the enhanced image does not display properly Replace the A11 Radio . ⇓ If the image displays properly
  10. All OK. Circuit/System Testing DTC B1B9D 2F
  11. Verify the LVDS interface cable is properly connected at the P16 Instrument Panel Cluster Control Module and the A11 Radio and there is no damage to the cable or connections. ⇒ If damage is found replace the LVDS cable. ⇓ If no damage is found.
  12. Ignition ON.
  13. Verify the P16 Instrument Panel Cluster Control Module displays an image. ⇒ If the P16 Instrument Panel Cluster Control Module does not display an image. Replace LVDS interface cable between the P16 Instrument Panel Cluster Control Module and the A11 Radio. 3.1. Ignition ON/Vehicle in Service Mode, infotainment system ON. 3.2. Verify the P16 Instrument Panel Cluster Control Module displays an image. ⇒ If the P16 Instrument Panel Cluster Control Module does not display an image. Replace the P16 Instrument Panel Cluster Control Module. 3.3. Ignition ON. 3.4. Verify the P16 Instrument Panel Cluster Control Module displays an image. ⇒ If the P16 Instrument Panel Cluster Control Module does not display an image. Replace the A11 Radio. ⇓ If the P16 Instrument Panel Cluster Control Module displays an image All OK. ⇓ If the P16 Instrument Panel Cluster Control Module displays an image.
  14. All OK. Circuit/System Testing DTC B1B9D 4B
  1. Ignition » On / Vehicle » In Service Mode
  2. Place vehicle in an area where a ambient temperature is 15–25° C (59–77° F) with engine OFF.
  3. Wait at least 30 minutes.
  4. Verify DTC B1B9D is not set. ⇒ If DTC B1B9D is not set All OK. ⇓ If DTC B1B9D is set
  5. Replace the component: B174W Front View Camera - Windshield
  6. Verify DTC B1B9D is not set. ⇒ If DTC B1B9D is not set All OK. ⇓ If DTC B1B9D is set
  7. Replace the component: A11 Radio Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification For control module replacement, programming, and setup refer to: Control Module References