Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001YNWM
Model Year Start: 2022 Model: Avalon HV Prod Date Range: [08/2021 -           ]
Title: CRUISE CONTROL: FRONT CAMERA SYSTEM: C1AAE00; Front Recognition Camera Heater Malfunction; 2022 MY Avalon Avalon HV [08/2021 -        ]

DTC

C1AAE00

Front Recognition Camera Heater Malfunction

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 (1 trip detection logic)
  • Open or short to ground detected in the forward recognition with heater hood sub-assembly circuit for 5 seconds or more (1 trip detection logic)
  • Forward recognition with heater hood sub-assembly
  • Forward recognition camera
  • Harness or connector

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. As a result, a DTC may be stored.
  • When the forward recognition camera is replaced with a new one or the windshield glass is replaced or removed/installed, make sure to read Before Starting Adjustment, then perform optical axis alignment for the forward recognition camera and clear the vehicle control history for each system.

    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 2022 MY Avalon Avalon HV [08/2021 -        ]; CRUISE CONTROL: FRONT CAMERA: TARGET ADJUSTMENT(ONE TIME RECOGNITION)

    Sequential Recognition: Click here 2022 MY Avalon Avalon HV [08/2021 -        ]; CRUISE CONTROL: FRONT CAMERA: TARGET ADJUSTMENT(SEQUENTIAL RECOGNITION)

    Driving Adjustment: Click here 2022 MY Avalon Avalon HV [08/2021 -        ]; CRUISE CONTROL: FRONT CAMERA: DRIVING ADJUSTMENT

PROCEDURE

1.

CHECK FOR DTCs

(a) Clear the DTCs.

Chassis > Front Recognition Camera > Clear DTCs

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

HINT:

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

(c) Check for DTCs.

Chassis > Front Recognition Camera > Trouble Codes

Result

Proceed to

DTC is not output

A

DTC is output

B
A

USE SIMULATION METHOD TO CHECK

B

2.

INSPECT FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY

(a) Turn the ignition switch off.

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

*a

Component without harness connected

(Forward Recognition with Heater Hood Sub-Assembly)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

P14-1 (IG1) - P14-2 (HTR)

Always

28.5 to 31.5 Ω
NG

REPLACE FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY

OK

3.

CHECK HARNESS AND CONNECTOR (POWER SOURCE VOLTAGE)

*a

Front view of wire harness connector

(to Forward Recognition with Heater Hood Sub-Assembly)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

P14-1 (IG1) - Body ground

Ignition switch ON

8 to 16 V

Ignition switch off

Below 1.5 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

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

(a) Disconnect the P5 forward recognition camera connector.

(b) 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
OK

REPLACE FORWARD RECOGNITION CAMERA

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR