CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for Sedan, Gasoline Model): UNABLE TO CONNECT TO CALL CENTER; 2020 MY Corolla Corolla Hatchback GR Corolla [09/2019

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000001LF5Z
Model Year Start: 2020	Model: GR Corolla	Prod Date Range: [09/2019 - 04/2020]
Title: CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for Sedan, Gasoline Model): UNABLE TO CONNECT TO CALL CENTER; 2020 MY Corolla Corolla Hatchback GR Corolla [09/2019 - 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 set.

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.

END

CHECK DTC

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Perform "Health Check" and check for current DTCs.

Click here

Result	Proceed to
DTCs are not output	A
DTCs are output	B

GO TO DIAGNOSTIC TROUBLE CODE CHART

3.	CHECK DCM OPERATION HISTORY

(a) Check "DCM Operation History".

Click here

Result	Proceed to
Signal strength is weak (0 or 1)	A
Communication indicates "Fail"	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.

END

4.	REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (Telematics Transceiver).

Click here

NOTICE:

The engine switch must be off.
Do not swap the DCM (Telematics Transceiver) with one from another vehicle.

PERFORM DCM ACTIVATION