Vehicle and workshop
- Vehicle make and model
- Toyota Vellfire
- Service category
- ADAS Calibration
- Workshop
- Sri Kuching Car Audio & Air Cond Service Centre, Taman Mastiara, Kuala Lumpur
Customer concern or upgrade request
The owner reported Blind Spot Monitor system warnings.
Inspection and diagnosis
Diagnostic scanning confirmed C1AC1, recorded as master module horizontal axis misalignment.
Repair and upgrade work
The owner reported Blind Spot Monitor (BSM) system warnings. Diagnostic scanning confirmed fault code C1AC1 — master module horizontal axis misalignment. We performed rear Blind Spot Monitor system calibration, replaced the faulty BSM module, and completed beam-axis adjustment to restore correct sensor alignment.
- Blind Spot Monitor fault diagnosis and code analysis
- Rear BSM module replacement and system calibration
- Horizontal beam-axis adjustment (C1AC1 rectification)
- Post-calibration system verification and road test
Components used in this case
- Replacement for the faulty Blind Spot Monitor module
Testing and verification
The work included post-calibration system verification and a road test. The recorded outcome confirms normal BSM operation with no remaining fault codes.
Documented outcome
Blind Spot Monitor system restored to normal operation with no remaining fault codes. Driver-assistance warnings cleared and system response verified after calibration.
Other workshop support
ADAS calibration also available: front radar, recognition camera, PCS, RSA, ICS, RCTA, LTA, headlight system, and parking support brake
Explore ADAS calibration servicesWorkshop photo gallery
2 workshop photos documenting this Toyota Vellfire case. Select a photo to enlarge it.
Questions about this Toyota Vellfire case
What did fault code C1AC1 mean in this Vellfire case?
The workshop recorded C1AC1 as master module horizontal axis misalignment in the Blind Spot Monitor system.
What work resolved this Vellfire's BSM warnings?
The faulty BSM module was replaced, the rear system was calibrated and horizontal beam-axis adjustment was completed. System verification confirmed normal operation without remaining codes.
