DTC C1AAE-00: Front Recognition Camera Heater Malfunction [06/2018 - 08/2021]: Procedure

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 C1AAE-00 is not output	A
   DTC C1AAE-00 is output	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] 

Result: 

B 

See step  2

1. Turn the engine switch off.
2. Disconnect the forward recognition with heater hood sub-assembly connector.

   Courtesy 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
   1 (IG1) - 2 (HTR)	Engine switch off	28.5 to 31.5 Ω

4. Connect the forward recognition with heater hood sub-assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY. Refer to  COMPONENTS [06/2018 - ] 

Result: 

OK 

See step  3

1. Disconnect the P14 forward recognition with heater hood sub-assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Forward Recognition with Heater Hood Sub-assembly)

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   P14-1 (IG1) - Body ground	Engine switch on (IG)	8 to 16 V
   	Engine switch off	Below 1.5 V

3. Connect the P14 forward recognition with heater hood sub-assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

Result: 

OK 

See step  4

1. Disconnect the P14 forward recognition with heater hood sub-assembly connector.
2. Disconnect the P5 forward recognition camera connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P14-2 (HTR) - P5-1 (HTR)	Always	Below 1 Ω
   P14-2 (HTR) or P5-1 (HTR) - Body ground	Always	10 kΩ or higher

4. Connect the P5 forward recognition camera connector.
5. Connect the P14 forward recognition with heater hood sub-assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE FORWARD RECOGNITION CAMERA. Refer to  COMPONENTS [06/2018 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY - FORWARD RECOGNITION CAMERA)