PRE-COLLISION 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-collision city sensor is detected.

DTC No.

DTC Detection Condition

Trouble Area

C1AA0

Pre-collision city sensor detects an internal malfunction.

  • Pre-collision city sensor

  • Harness or connector (w/ Pre-collision City Heater)

WIRING DIAGRAM

C364773E09

CAUTION / NOTICE / HINT

Note:

  • w/ Pre-collision City Heater:

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

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

  • If the pre-collision city sensor has been replaced, or the windshield glass has been replaced or removed/installed, be sure to perform pre-collision city sensor learning (Click here).

PROCEDURE

  1. CHECK FOR DTCS

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Chassis / PCS/LDA/RSA/LVN / Trouble Codes.

    5. Check for DTCs (Click here).

    Table 1. Result

    Result

    Proceed to

    DTC C1AA0 is output (w/o Pre-collision City Heater)

    A

    DTC C1AA0 is output (w/ Pre-collision City Heater)

    B

    DTC C1AA0 is not output

    C

    CHECK HARNESS AND CONNECTOR (TSS C HTR RELAY (RELAY) COIL CIRCUIT)Click here

    USE SIMULATION METHOD TO CHECK

    (Click here)

  2. REPLACE PRE-COLLISION CITY SENSOR

    1. Replace the pre-collision city sensor (Click here).

    2. Perform pre-collision city sensor learning (Click here).

    Table 2. Result

    Proceed to

    NEXT

    END

  3. CHECK HARNESS AND CONNECTOR (TSS C HTR RELAY (RELAY) COIL CIRCUIT)

    1. C372641C01

      *1

      Instrument Panel Junction Block Assembly

      *2

      ECU-IG NO.3 Fuse

      Remove the ECU-IG NO.3 fuse.

    2. Remove the TSS C HTR relay (relay).

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      ECU-IG NO.3 fuse holder terminal 2 - TSS C HTR relay (relay) holder terminal 1

      Positive (+) tester probe → ECU-IG NO.3 fuse holder terminal 2

      Negative (-) tester probe → TSS C HTR relay (relay) holder terminal 1

      Always

      Below 1 Ω

      ECU-IG NO.3 fuse holder terminal 2 - TSS C HTR relay (relay) holder terminal 1

      Positive (+) tester probe → TSS C HTR relay (relay) holder terminal 1

      Negative (-) tester probe → ECU-IG NO.3 fuse holder terminal 2

      Always

      10 kΩ or higher

    4. Disconnect the Q12 pre-collision city sensor connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      Q12-8 (BUZ) - TSS C HTR relay (relay) holder terminal 1

      Positive (+) tester probe → Q12-8 (BUZ)

      Negative (-) tester probe → TSS C HTR relay (relay) holder terminal 1

      Always

      Below 1 Ω

      Q12-8 (BUZ) - TSS C HTR relay (relay) holder terminal 1

      Positive (+) tester probe → TSS C HTR relay (relay) holder terminal 1

      Negative (-) tester probe → Q12-8 (BUZ)

      Always

      10 kΩ or higher

    6. Install the ECU-IG NO.3 fuse.

    7. Install the TSS C HTR relay (relay).

    8. Connect the Q12 pre-collision city sensor connector.

    Table 3. Result

    Proceed to

    OK

    NG

    REPLACE PRE-COLLISION CITY SENSOR

    Click here

  4. REPLACE HARNESS AND CONNECTOR (TSS C HTR RELAY (RELAY) COIL CIRCUIT)

    1. Repair or replace the harness or connector.

    Result

    Proceed to

    NEXT

  5. REPLACE PRE-COLLISION CITY SENSOR

    1. Replace the pre-collision city sensor.

      Click here

    2. Perform pre-collision city sensor learning.

      Click here

    Table 4. Result

    Proceed to

    NEXT

    END