DTC C1AA2: Vehicle Speed Tolerance Malfunction [02/2017 - 08/2020]: Procedure

WARNING: This page is about a different car, the 2020 Toyota C-HR, 2019 Toyota C-HR, and 2018 Toyota C-HR. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT COMBINATION METER ASSEMBLY (ON-VEHICLE INSPECTION)

Perform On-vehicle Inspection of the meter/gauge system.

Refer to ON-VEHICLE INSPECTION [02/2017 - 10/2017] , or refer to ON-VEHICLE INSPECTION [10/2017 - 05/2018] , or refer to ON-VEHICLE INSPECTION [05/2018 - 09/2019] , or refer to ON-VEHICLE INSPECTION [09/2019 - ]

HINT:

Check the meter function by referring to On-vehicle Inspection for the combination meter assembly.

Result

Result	Proceed to
Combination meter assembly is normal	A
Combination meter assembly is malfunctioning	B

Result:

CHECK METER / GAUGE SYSTEM (SPEEDOMETER MALFUNCTION). Refer to Speedometer Malfunction [02/2017 - 10/2017] , or refer to Speedometer Malfunction [10/2017 - ]

Result:

See step 2

CHECK DTC OUTPUT

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Chassis / LKA/LDA / Trouble Codes.
Clear the DTCs.
Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

Chassis > LKA/LDA > Clear DTCs
Make sure that the DTC detection conditions are met.
HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.
1. Turn the ignition switch to ON and wait 1 minute or more.
2. Drive the vehicle at a speed of 5 km/h (3 mph) or more.

Check for DTCs.

Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

Chassis > LKA/LDA > Trouble Codes

Result

Result	Proceed to
DTC C1AA2 is output	A
DTC C1AA2 is not output	B

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [02/2017 - 10/2017] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2017 - 05/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [05/2018 - 09/2019] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2019 - 08/2020]

Result:

See step 3

REPLACE FORWARD RECOGNITION CAMERA

Replace the forward recognition camera.
Refer to REMOVAL [02/2017 - 08/2020]

Adjust the forward recognition camera.

Refer to ADJUSTMENT (SEQUENTIAL RECOGNITION) [02/2017 - 08/2020]

Result

Proceed to
NEXT

Result:

See step 4

CHECK DTC OUTPUT

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Chassis / LKA/LDA / Trouble Codes.
Clear the DTCs.
Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

Chassis > LKA/LDA > Clear DTCs
Make sure that the DTC detection conditions are met.
HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.
1. Turn the ignition switch to ON and wait 1 minute or more.
2. Drive the vehicle at a speed of 5 km/h (3 mph) or more.

Check for DTCs.

Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

Chassis > LKA/LDA > Trouble Codes

Result

Result	Proceed to
DTC C1AA2 is output	A
DTC C1AA2 is not output	B

Result:

REPLACE COMBINATION METER ASSEMBLY. Refer to REMOVAL [02/2017 - 08/2020]

Result:

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)