Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001N4QC
Model Year Start: 2021 Model: Corolla Prod Date Range: [04/2020 -           ]
Title: CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for HV Model): UNABLE TO CONNECT TO CALL CENTER; 2021 - 2025 MY Corolla Corolla HV [04/2020 -        ]

UNABLE TO CONNECT TO CALL CENTER

DESCRIPTION

This may occur when the intensity of telephone radio frequency was very weak, or the safety connect system has a malfunction and a DTC is stored.

PROCEDURE

1.

CHECK COMMUNICATION SERVICE CONDITION

(a) Move the vehicle.

(1) If the vehicle is outside the communication service area, move the vehicle to a communication service area, wait for a while and perform the operation again.

OK:

Same problem does not occur.

OK

END
NG

2.

CHECK DTC

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch on (IG) and wait for 10 seconds or more.

(d) Turn the Techstream on.

(e) Clear the DTCs.

Body Electrical > Telematics > Clear DTCs

(f) Check for DTCs and check that no DTCs are output.

Body Electrical > Telematics > Trouble Codes

OK:

No DTCs are output.

NG

GO TO DIAGNOSTIC TROUBLE CODE CHART 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for HV Model): DIAGNOSTIC TROUBLE CODE CHART 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for HV Model): DIAGNOSTIC TROUBLE CODE CHART

OK

3.

CHECK DCM OPERATION HISTORY

(a) Check "DCM Operation History".

Click here 2021 - 2025 MY Corolla Corolla HV [04/2020 -        ]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for HV Model): DCM OPERATION HISTORY

Result

Proceed to

The value of "Electric Level" is low (Level 0 or Level 1)

A

No problems with signal strength or communication

B

HINT:

If there was a communication problem in the past but the communications are working correctly now, it is possible that the source of the problem was temporary radio interference, or the vehicle may have been outside the service area.

B

CONTACT SERVICE CENTER
A

4.

REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (telematics transceiver) with a new one.

Click here 2021 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [04/2020 - 09/2022]; CELLULAR COMMUNICATION: DCM(TELEMATICS TRANSCEIVER): REMOVAL 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; CELLULAR COMMUNICATION: DCM(TELEMATICS TRANSCEIVER): REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; CELLULAR COMMUNICATION: DCM(TELEMATICS TRANSCEIVER): REMOVAL

NOTICE:

  • The power switch must be off.
  • Do not exchange the DCM (telematics transceiver) with one from another vehicle.
NEXT

PERFORM DCM ACTIVATION