Gå til hovedindhold

Camera Calibration Not Possible / NRC Error Messages During ADAS Calibration

Opdateret

Technical Bulletin

Subject: Camera Calibration Not Possible / NRC Error Messages During ADAS Calibration
Products affected: Vehicles with continuous dynamic ADAS calibration (multi‑camera systems)
Tester: megaMacs (same behavior as OE testers)

 

Summary

In certain situations, users may experience NRC error messages or failed attempts to initiate camera calibration using megaMacs. This behavior is not a tester limitation. The megaMacs user experiences the same control‑unit response and error condition as with the OE tester.

The root cause lies in the vehicle’s internal calibration logic and system state, not in the diagnostic tool.

 

Symptom

  • Calibration cannot be started
  • NRC error codes (e.g. NRCXX) displayed
  • User complaint that “megaMacs cannot start calibration”
  • Identical error behavior observed with OE diagnostic testers

Diagnostic logs typically show that the vehicle is in:
“Calibration mode active”

 

Technical Background

Modern vehicles with ADAS do not perform calibration as a single, isolated windshield procedure.

Instead, these vehicles run continuous dynamic calibration processes while driving.

Key points:

  • A calibration always starts by clearing existing reference data and learning new reference values
  • Dynamic calibration is constantly active in the background
  • Multiple sensors and ECUs are involved, not only the front camera

Affected systems typically include:

  • Front camera
  • Rear camera
  • Side cameras
  • Side assist radar

These sensors collaborate to support functions such as:

  • Lane Keeping Assist
  • Lane Departure Warning
  • Lane Change Assist

Dynamic calibration is performed automatically by the vehicle in intervals of approximately 10–30 km, depending on vehicle speed and driving conditions.

 

Typical Workshop Scenario

  1. Vehicle arrives at workshop
  2. Windshield is replaced
  3. Technician attempts to manually initiate camera calibration
  4. Calibration request is rejected with NRC error

At this point:

  • The vehicle is already performing its own internal dynamic calibration
  • No windshield misalignment fault has yet been detected by the system
  • The control unit therefore blocks external calibration initiation

 

Practical Resolution / Recommended Procedure

In remote support cases, the following procedure has proven effective:

  1. Test‑drive the vehicle for 5–10 minutes
  2. Switch off the vehicle
  3. Lock the vehicle and wait 5–10 minutes
  4. Retry calibration with the tester

In most cases, this allows the system to:

  • Exit internal calibration mode
  • Accept a new calibration command

 

Important Clarifications

  • This behavior is not worse on megaMacs than on OE testers
  • OE testers show similar errors, but interpretation requires system knowledge
  • The issue is vehicle state–dependent, not tester‑dependent

 

NRC Error Codes – Important Note

NRC errors:

  • Are notifications from the control unit
  • Are not generated by the diagnostic tester
  • Commonly misunderstood in hotline cases

Example:

  • NRC33 typically indicates that the security/firewall mechanism is active
  • This does not mean the tester is malfunctioning
  • Resolution may require:
    • Connecting the tester online
    • Logging in via CSM, where applicable

Relateret til