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Home >> Lexus >> 2017 >> ES 300h >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Front Recognition Camera System (Diagnostic Codes & Circuit Tests) >> Front Recognition Camera System >> DTC C1AA3: Vehicle Speed Sensor Circuit [07/2015 - ] >> Description

DTC C1AA3: Vehicle Speed Sensor Circuit [07/2015 - ]: Description

The forward recognition camera receives vehicle speed signals from the brake booster with master cylinder assembly (skid control ECU). If the brake booster with master cylinder assembly (skid control ECU) receives a vehicle speed sensor malfunction signal, it informs the forward recognition camera via CAN communication, and DTC C1AA3 is stored.

DTC No. DTC Detection Condition Trouble Area
C1AA3 While driving with the front recognition camera system activated, a signal indicating a malfunction in the vehicle speed sensor is received from the skid control ECU for 5 seconds or more.
  • Electronically controlled brake system
  • Brake booster with master cylinder assembly (skid control ECU)
  • Forward recognition camera