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Home >> Lexus >> 2009 >> LS 460 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Pre-Collision (W/O Driver Monitor Camera) (Diagnostic Codes)) >> PRE-COLLISION SYSTEM (w/o Driver Monitor Camera) >> DTC C1A0A: Front Radar Sensor Region Code Mismatch >> Description
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DTC C1A0A: Front Radar Sensor Region Code Mismatch: Description

WARNING: This page is about a different car, the 2010 Lexus LS 460L and 2010 Lexus LS 460. However, it is still accessible from the selected car via links, so may be relevant.

The driving support ECU uses the front millimeter wave radar sensor to detect obstacles in front of the vehicle. Based on this information, the driving support ECU sends pre-collision control operation signals.

When the front millimeter wave radar sensor is replaced with a new one, it acquires the country specification information from the driving support ECU. Also, when the driving support ECU is replaced with a new one, it receives country specification information from the combination meter. When country specification information in the sensor and ECU do not match, DTC C1A0A is output.

DTC Code DTC Detection Condition Trouble Area
C1A0A While initial check is running, engine switch is on (IG) and pre-collision system is operating, country specification information in driving support ECU and front millimeter wave radar sensor do not match for 1 sec.
  • Front millimeter wave radar sensor
  • Combination meter
  • Driving support ECU