Toyota Yaris: Front Camera System / Front Recognition Camera Heater Malfunction (C1AAE00)

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Engine & Hybrid System / Cruise Control / Front Camera System / Front Recognition Camera Heater Malfunction (C1AAE00)

DESCRIPTION

The forward recognition camera controls the flow of current to the forward recognition with heater hood sub-assembly.

If the forward recognition camera detects a malfunction in the forward recognition with heater hood sub-assembly circuit, it will store this DTC.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1AAE00	Front Recognition Camera Heater Malfunction	Either of the following conditions is met after 10 seconds have elapsed since the ignition switch was turned to ON: Short to +B detected in the forward recognition with heater hood sub-assembly circuit for 1 second or more cumulatively Open or short to ground detected in the forward recognition with heater hood sub-assembly circuit for 5 seconds or more	Forward recognition with heater hood sub-assembly Forward recognition camera Wire harness or connector

DTC Detection Conditions

		Vehicle Condition
		Pattern 1	Pattern 2	Pattern 3
Diagnosis Condition	After 10 seconds have elapsed since the ignition switch was turned to ON	○	○	○
Malfunction Status	Short to +B detected in the forward recognition with heater hood sub-assembly circuit.	○	-	-
	Open to ground detected in the forward recognition with heater hood sub-assembly circuit.	-	○	-
	Short to ground detected in the forward recognition with heater hood sub-assembly circuit.	-	-	○
Detection Time		1 second or more	5 seconds or more	5 seconds or more
Number of Trips		1 trip	1 trip	1 trip

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.
When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle and a DTC may be stored.
Forward recognition camera axis alignment can be performed by using either One Time Recognition, Sequential Recognition or Driving Adjustment.
HINT:

Forward recognition camera axis alignment can be performed by using either One Time Recognition, Sequential Recognition or Driving Adjustment.

One Time Recognition: Click here

Sequential Recognition: Click here

Driving Adjustment: Click here

PROCEDURE

CLEAR DTC

(a) Clear the DTCs.

Chassis > Front Recognition Camera > Clear DTCs

2.	CHECK FOR DTCs

(a) Make sure that the DTC detection conditions are met.

HINT:

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

(b) Check for DTCs.

Chassis > Front Recognition Camera > Trouble Codes

Result	Proceed to
DTC C1AAE00 is not output	A
DTC C1AAE00 is output	B

USE SIMULATION METHOD TO CHECK

3.	INSPECT FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY

(a) Turn the ignition switch off.

(b) Disconnect the V11 forward recognition with heater hood sub-assembly connector.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
V11-1 (IG1) - V11-2 (HTR)	Ignition switch off	25.6 to 28.4 Ω

(d) Connect the V11 forward recognition with heater hood sub-assembly connector.

REPLACE FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY

4.	CHECK HARNESS AND CONNECTOR (POWER SOURCE VOLTAGE)

(a) Disconnect the forward recognition with heater hood sub-assembly connector.

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

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
V11-1 (IG1) - Body ground	Ignition switch ON	8 to 16 V
V11-1 (IG1) - Body ground	Ignition switch off	Below 1.5 V

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

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

(a) Disconnect the V11 forward recognition with heater hood sub-assembly connector.

(b) Disconnect the V10 forward recognition camera connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
V11-2 (HTR) - V10-1 (HTR)	Always	Below 1 Ω
V11-2 (HTR) or V10-1 (HTR) - Body ground	Always	10 kΩ or higher

(d) Connect the V10 forward recognition camera connector.

(e) Connect the V11 forward recognition with heater hood sub-assembly connector.

REPLACE FORWARD RECOGNITION CAMERA

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

Front Recognition Camera Optical Axis Misalignment Malfunction (C1AA800)

DESCRIPTION The forward recognition camera monitors its optical axis status. If it determines that the optical axis alignment has become misaligned, it will store DTC C1AA800...

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DESCRIPTION When a malfunction is detected between various ECUs and sensors, these DTCs are stored. DTC No. Detection Item DTC Detection Condition Trouble Area U010087 Lost Communication With ECM/PCM "A" Missing Message When the ignition switch is ON for 3 seconds or more, and the vehicle is being driven at a speed of 5 km/h (3mph) or more, a communication malfunction between the forward recognition camera and the ECM continues for 2 seconds or more...

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