PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1AA0

DTC Code DTC Name
C1AA0 Front Camera Module Circuit

DESCRIPTION

DTC C1AA0 is output when an internal circuit malfunction in the pre-crash safety city sensor is detected.

DTC Code DTC Detection Condition Trouble Area
C1AA0 When the ignition switch is ON and the system is operating, an internal circuit malfunction continues in the pre-crash safety city sensor for 5 seconds or more.

  • Pre-crash safety city sensor

  • Harness or connector (w/ Pre-crash safety city heater)

WIRING DIAGRAM

B0047WFE20

CAUTION / NOTICE / HINT

Note


  • When replacing the pre-crash safety city sensor, replace it with a new one. If an ECU 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 output.

  • 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.

  • Perform adjustment using "ONE TIME RECOGNITION" or "SEQUENTIAL RECOGNITION".


  • Inspect the fuses for circuits related to this system before performing the following procedure.*1


    • *1: w/ Pre-crash Safety City Heater

PROCEDURE


  1. CHECK FOR DTCs


    1. Check if the stored DTCs are current DTCs.

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1AA0 is not output A
      DTC C1AA0 is output (w/o Pre-crash safety city heater) B
      DTC C1AA0 is output (w/ Pre-crash safety city heater) C

    B

    USE SIMULATION METHOD TO CHECK Click here

    C

    CHECK HARNESS AND CONNECTOR (TSS C HTR RELAY (PRE-CRASH SAFETY CITY HEATER RELAY) COIL CIRCUIT) (TSS C HTR RELAY COIL CIRCUIT) Click here

    A

  2. REPLACE PRE-CRASH SAFETY CITY SENSOR


    1. Replace the pre-crash safety city sensor Click here.


    NEXT

    END

  3. CHECK HARNESS AND CONNECTOR (TSS C HTR RELAY (PRE-CRASH SAFETY CITY HEATER RELAY) COIL CIRCUIT) (TSS C HTR RELAY COIL CIRCUIT)


    1. Remove the ECU-IG NO. 1 fuse.

    2. Remove the TSS C HTR relay (pre-crash safety city heater relay).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ECU-IG NO. 1 fuse terminal 2 - TSS C HTR relay (pre-crash safety city heater relay) holder terminal 1 Positive (+) tester probe → ECU-IG NO. 1 fuse terminal 2 Negative (-) tester probe → TSS C HTR relay (pre-crash safety city heater relay) holder terminal 1 Always Below 1 Ω
      Positive (+) tester probe → TSS C HTR relay (pre-crash safety city heater relay) holder terminal 1 Negative (-) tester probe → ECU-IG NO. 1 fuse terminal 2 Always 10 kΩ or higher

    4. Disconnect the L12 pre-crash safety city sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L12-8 (BUZ) - TSS C HTR relay (pre-crash safety city heater relay) holder terminal 1 Positive (+) tester probe → L12-8 (BUZ) Negative (-) tester probe → TSS C HTR relay (pre-crash safety city heater relay) holder terminal 1 Always Below 1 Ω
      Positive (+) tester probe → TSS C HTR relay (pre-crash safety city heater relay) holder terminal 1 Negative (-) tester probe → L12-8 (BUZ) Always 10 kΩ or higher

    OK

    REPLACE PRE-CRASH SAFETY CITY SENSOR

    NG

  4. REPAIR OR REPLACE HARNESS OR CONNECTOR (TSS C HTR RELAY (PRE-CRASH SAFETY CITY HEATER RELAY) COIL CIRCUIT)


    1. Repair or replace the harness or connector.


    NEXT

    REPLACE PRE-CRASH SAFETY CITY SENSOR