PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1AA7

DTC Code DTC Name
C1AA7 Skid Control Buzzer Circuit

DESCRIPTION

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

DTC No. Detection Item DTC Detection Condition Trouble Area
C1AA7 Skid Control Buzzer Circuit

Either of the following conditions is met with the power switch on (IG) and a pre-crash safety city buzzer signal being output:


  • Pre-crash safety city buzzer on malfunction continues for 1 second or more.

  • Pre-crash safety city buzzer off malfunction continues for 1 second or more.

  • Pre-crash safety city buzzer

  • Pre-crash safety city sensor

  • Harness or connector

WIRING DIAGRAM

A01KRI3E07

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses for circuits related to this system before performing the following procedure.

  • When replacing the pre-crash safety city sensor, replace it with a new one and be sure to initialize the settings. If a pre-crash safety city sensor which was installed to another vehicle is used, the information stored in the pre-crash safety city sensor will not match the information from the vehicle and, as a result, a DTC may be stored.

  • If the pre-crash safety city sensor has been replaced, or the windshield glass has been replaced or removed/installed, be sure to perform Recognition Camera/Target Position Memory and Recognition Camera Axis Adjust.

    Click here

PROCEDURE


  1. INSPECT PRE-CRASH SAFETY CITY BUZZER


    1. Remove the pre-crash safety city buzzer.

      Click here

    2. Inspect the pre-crash safety city buzzer.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE PRE-CRASH SAFETY CITY BUZZER Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (PRE-CRASH SAFETY CITY BUZZER - AUXILIARY BATTERY)


    1. A01KRHDC69
      *a

      Front view of wire harness connector

      (to Pre-crash Safety City Buzzer)

      Disconnect the E132 pre-crash safety city buzzer connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      E132-2 (IG1) - Body ground Power switch is on (IG) 11 to 14 V
      E132-2 (IG1) - Body ground Power switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (PRE-CRASH SAFETY CITY BUZZER - PRE-CRASH SAFETY CITY SENSOR)


    1. Disconnect the E132 pre-crash safety city buzzer connector.

    2. Disconnect the O9 pre-crash safety city sensor connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E132-1 (BZ) - O9-8 (BUZ) Always Below 1 Ω
      E132-1 (BZ) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE PRE-CRASH SAFETY CITY SENSOR Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR