Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GZ0J
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

HINT:

  • Before performing troubleshooting for the front radar sensor system, perform troubleshooting for the pre-collision system.

    Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; PRE-COLLISION: PRE-COLLISION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP
NEXT

2.

PRE-CHECK

(a) Measure the auxiliary battery voltage with power switch off.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.

(b) Check the fuses and relays.

(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

NEXT

3.

CHECK CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, check that the CAN communication system is functioning normally.

Click here 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM

OK:

CAN communication system is functioning normally.

NG

GO TO CAN COMMUNICATION SYSTEM

OK

4.

CHECK FOR DTCs*

(a) Check for DTCs.

Body Electrical > Front Radar Sensor > Trouble Codes

(b) Make a note of any DTCs that are output.

Result

Proceed to

DTCs are not output

A

DTC C1A1100 is output

B

DTCs other than C1A1100 are output

C
B

GO TO DTC CHART (C1A1100)

C

GO TO STEP 7

A

5.

CHECK VEHICLE CONTROL HISTORY*

(a) Using the Techstream, check for Vehicle Control History.

Body Electrical > Front Radar Sensor > Utility

Tester Display

Vehicle Control History (RoB)

(b) Record any output Vehicle Control History.

Result

Proceed to

Vehicle Control History codes are not output

A

Vehicle Control History code X2026 or X2028 is output

B

Vehicle Control History codes other than X2026 and X2028 are output

C
A

GO TO SYMPTOM SIMULATION

B

GO TO VEHICLE CONTROL HISTORY (X2026 or X2028)

C

6.

RECONFIRM VEHICLE CONTROL HISTORY*

(a) Using the Techstream, clear the Vehicle Control History.

Body Electrical > Front Radar Sensor > Utility

Tester Display

Vehicle Control History (RoB)

(b) Using the Techstream, check for Vehicle Control History.

Body Electrical > Front Radar Sensor > Utility

Tester Display

Vehicle Control History (RoB)

Result

Proceed to

Vehicle Control History codes are not output

A

Vehicle Control History codes are output

B
A

GO TO SYMPTOM SIMULATION

B

GO TO VEHICLE CONTROL HISTORY

7.

RECONFIRM DTC OUTPUT*

(a) Clear the DTCs.

Body Electrical > Front Radar Sensor > Clear DTCs

(b) Reproduce the vehicle conditions that were present when the DTCs that were noted were stored.

HINT:

Refer to each corresponding DTC for details on the detection conditions.

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM (for HV Model): DIAGNOSTIC TROUBLE CODE CHART

(c) Recheck for DTCs.

Body Electrical > Front Radar Sensor > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B
A

GO TO STEP 5

B

GO TO DTC CHART