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DTC C1AAE-00: Front Recognition Camera Heater Malfunction [01/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus RC F and 2023 Lexus RC F. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR DTCs 
    1. Clear the DTCs.

      Chassis > Front Recognition Camera > Clear DTCs 

    2. Make sure that the DTC detection conditions are met.

      HINT: 

      If the detection conditions are not met, the system cannot detect the malfunction.

    3. Check for DTCs.

      Chassis > Front Recognition Camera > Trouble Codes 

      Result

      Result Proceed to
      DTC is not output A
      DTC is output B

    Result: 

    A 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [01/2023 - ] 

    Result: 

    B 

    See step  2

  2. INSPECT FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY 
    1. Turn the engine switch off.
    2. Disconnect the forward recognition with heater hood sub-assembly connector.
      GTY972123Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Forward Recognition with Heater Hood Sub-assembly)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      W16-1 (IG1) - W16-2 (HTR) Always 28.5 to 31.5 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY. Refer to  REMOVAL [01/2023 - ] 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE VOLTAGE) 
    GTY1173379Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Front view of wire harness connector
    (to Forward Recognition with Heater Hood Sub-assembly)
    1. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      W16-1 (IG1) - Body ground Engine switch on (IG) 8 to 16 V
      Engine switch off Below 1.5 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY - FORWARD RECOGNITION CAMERA) 
    1. Disconnect the W18 forward recognition camera connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      W16-2 (HTR) - W18-1 (HTR) Always Below 1 Ω
      W16-2 (HTR) or W18-1 (HTR) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [01/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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