Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000014W7R
Model Year Start: 2018 Model: Camry HV Prod Date Range: [07/2017 - 09/2018]
Title: CRUISE CONTROL: LANE DEPARTURE ALERT SYSTEM (w/ Steering Control): C1AA4,C1AA5; Yaw Rate Sensor Circuit; 2018 MY Camry HV [07/2017 - 09/2018]

DTC

C1AA4

Yaw Rate Sensor Circuit

DTC

C1AA5

Yaw Rate Sensor Power Supply Voltage Circuit

DESCRIPTION

The forward recognition camera receives vehicle stability signals from the yaw rate sensor (airbag sensor assembly). If the yaw rate sensor (airbag sensor assembly) detects an abnormal yaw rate sensor signal or yaw rate sensor power supply voltage, it informs the forward recognition camera via CAN communication, and DTC C1AA4 or C1AA5 is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AA4

Yaw Rate Sensor Circuit

After the power switch is turned on (IG) for 3 seconds or more, when the vehicle is being driven at a speed of 5 km/h (4 mph) or more, a signal from the yaw rate sensor (airbag sensor assembly) indicating a malfunction in the yaw rate sensor is detected by the forward recognition camera for 5 seconds or more.
  • Electronically controlled brake system
  • Forward recognition camera

C1AA5

Yaw Rate Sensor Power Supply Voltage Circuit

After the power switch is turned on (IG) for 3 seconds or more, when the vehicle is being driven at a speed of 5 km/h (4 mph) or more, a signal from the yaw rate sensor (airbag sensor assembly) indicating an abnormal yaw rate sensor power supply voltage signal is detected by the forward recognition camera for 5 seconds or more.
  • Electronically controlled brake system
  • Forward recognition camera

CAUTION / NOTICE / HINT

NOTICE:

  • 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.
  • If the forward recognition camera has been replaced with a new one, be sure to perform forward recognition camera adjustment.

    Click here 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; CRUISE CONTROL: FRONT CAMERA: ADJUSTMENT (SEQUENTIAL RECOGNITION)

  • The lane departure alert system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.

    Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

PROCEDURE

1.

CHECK FOR DTCs (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)

HINT:

Lane departure alert system DTC C1AA4 or C1AA5 may be stored due to a malfunction in the electronically controlled brake system. Therefore it is necessary to check for and troubleshoot electronically controlled brake system DTCs first.

(a) Check for DTCs.

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Proceed to

Electronically controlled brake system DTCs are not output

A

Electronically controlled brake system DTCs are output

B
B

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

A

2.

CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM)

(a) Clear the DTCs.

Chassis > LKA/LDA > Clear DTCs

(b) Perform the following procedure.

HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.

  1. Turn the power switch on (IG) and wait 3 seconds or more.
  2. Drive the vehicle at a speed of 5 km/h (4 mph) or more for 5 seconds or more.

(c) Check for DTCs.

Chassis > LKA/LDA > Trouble Codes

Result

Proceed to

DTC C1AA4 and C1AA5 are not output

A

DTC C1AA4 or C1AA5 is output

B
A

USE SIMULATION METHOD TO CHECK

B

REPLACE FORWARD RECOGNITION CAMERA