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DTC C1AA7: Skid Control Buzzer Circuit [11/2015 - 06/2017]: Description

When the pre-collision city sensor uses the pre-collision alarm control to sound a warning, a buzzer signal is output to the pre-collision city buzzer. This DTC is output when the pre-collision city sensor detects a malfunction in the pre-collision city buzzer circuit.

DTC No. DTC Detection Condition Trouble Area
C1AA7
  • The auxiliary battery voltage is 9 V or more and either of the following conditions is met:
    • Voltage at the BUZ terminal of the pre-collision city sensor is 0.703 V or more for 0.06 seconds or more when a pre-collision city buzzer request signal is being output.
    • Voltage at the BUZ terminal of the pre-collision city sensor is 0.134 V or less for 0.06 seconds or more when a pre-collision city buzzer request signal is not being output.
  • Pre-collision city buzzer
  • Pre-collision city sensor
  • Harness or connector