DTC C1AAE-00: Front Recognition Camera Heater Malfunction [07/2020 - ]: Procedure

WARNING: This page is about a different car, the 2022 Toyota Prius and 2021 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR DTCs

Clear the DTCs.
Chassis > Front Recognition Camera > Clear DTCs
Make sure that the DTC detection conditions are met.
HINT:

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

Check for DTCs.

Chassis > Front Recognition Camera > Trouble Codes

Result

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

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [07/2020 - 06/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2021 - ]

Result:

See step 2

INSPECT FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY

Turn the power switch off.

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)

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

Standard Resistance

(O18)

Tester Connection	Condition	Specified Condition
O18-1 (IG1) - O18-2 (HTR)	Always	28.5 to 31.5 Ω

Result

Proceed to
OK
NG

Result:

REPLACE FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY. Refer to REMOVAL [07/2020 - ]

Result:

See step 3

CHECK HARNESS AND CONNECTOR (POWER SOURCE VOLTAGE)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

Standard Voltage

(O18)

Tester Connection	Condition	Specified Condition
O18-1 (IG1) - Body ground	Power switch ON	8 to 16 V
O18-1 (IG1) - Body ground	Power switch off	Below 1.5 V

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 4

CHECK HARNESS AND CONNECTOR (FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY - FORWARD RECOGNITION CAMERA)

Disconnect the O7 forward recognition camera connector.

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

Standard Resistance

(O18, O7)

(O18)

(O7)

Tester Connection	Condition	Specified Condition
O18-2 (HTR) - O7-1 (HTR)	Always	Below 1 Ω
O18-2 (HTR) or O7-1 (HTR) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

REPLACE FORWARD RECOGNITION CAMERA. Refer to REMOVAL [07/2020 - ]

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR