PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1AAF

DTC Code DTC Name
C1AAF Heater Activation Relay Open

DESCRIPTION

The pre-crash safety city sensor controls the TSS C HTR relay to turn the pre-crash safety city heater on and off.

If the pre-crash safety city sensor detects a malfunction in the TSS C HTR relay coil circuit, it will store DTC C1AAF.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1AAF Heater Activation Relay Open

    Either of the following is detected:

  • When a pre-crash safety city heater operation request is output, voltage at terminal BUZ of the pre-crash safety city sensor is 1.368 V or more for 5 seconds or more.

  • When a pre-crash safety city heater operation request is not output, voltage at terminal BUZ of the pre-crash safety city sensor is 0.145 V or less for 5 seconds or more.

  • TSS C HTR relay

  • Pre-crash safety city sensor

  • Harness or connector

Tech Tips

Refer to Outline of Pre-crash Safety City Heater in System Description for the pre-crash safety city heater operation conditions.

Click here

WIRING DIAGRAM

A00322CE04

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 perform initialization. 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. CHECK HARNESS AND CONNECTOR (PRE-CRASH SAFETY CITY SENSOR POWER SOURCE CIRCUIT)


    1. A00324GC02
      *a

      Front view of wire harness connector

      (to Pre-crash Safety City Sensor)

      Disconnect the O9 pre-crash safety city sensor connector.

      Note

      DTCs may be stored when connectors are disconnected during troubleshooting. Therefore, be sure to clear the DTCs using the GTS after troubleshooting has been completed.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      O9-8 (BUZ) - Body ground Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT TSS C HTR RELAY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (DIODE (TSS_S_FW) CIRCUIT)


    1. Remove the TSS C HTR relay.

    2. A00324GC02
      *a

      Front view of wire harness connector

      (to Pre-crash Safety City Sensor)

      Disconnect the O9 pre-crash safety city sensor connector.

      Note

      DTCs may be stored when connectors are disconnected during troubleshooting. Therefore, be sure to clear the DTCs using the GTS after troubleshooting has been completed.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      O9-8 (BUZ) - Body ground Power switch on (IG) Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE PRE-CRASH SAFETY CITY SENSOR Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (DIODE (TSS_S_FW) CIRCUIT)

  3. INSPECT TSS C HTR RELAY


    1. Remove the TSS C HTR relay.

    2. Inspect the TSS C HTR relay.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TSS C HTR RELAY COIL CIRCUIT)

    NG

    REPLACE TSS C HTR RELAY