CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for Gasoline Model): B15C0,B15C1; Short in GPS Antenna; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000001BH7H
Model Year Start: 2019	Model: GR Corolla	Prod Date Range: [06/2018 - 01/2019]
Title: CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for Gasoline Model): B15C0,B15C1; Short in GPS Antenna; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]

DTC

B15C0

Short in GPS Antenna

DTC

B15C1

Open in GPS Antenna

DESCRIPTION

These DTCs are stored when the DCM (Telematics Transceiver) detects an open or a short in the telephone and GPS antenna assembly (for Roof Side) circuit. The DCM (Telematics Transceiver) receives 1574.42 - 1576.42 MHz radio frequency signals from satellites through the telephone and GPS antenna assembly (for Roof Side). The cable is a 50 Ω coaxial cable.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15C0

Short in GPS Antenna

Current for telephone and GPS antenna assembly (for Roof Side) is lower (Ω) malfunction criterion for 10 seconds when engine switch is on (IG).

(Short circuit)

DCM (Telematics Transceiver)
Telephone and GPS antenna assembly (for Roof Side)
Telephone and GPS antenna cord (Antenna cord sub-assembly (for Type A))
Telephone and GPS antenna cord (Antenna cord sub-assembly (for Type B))
Telephone and GPS antenna cord (No. 2 antenna cord sub-assembly)

B15C1

Open in GPS Antenna

Current for telephone and GPS antenna assembly (for Roof Side) is higher (Ω) malfunction criterion for 10 seconds when engine switch is on (IG).

(Open circuit)

DCM (Telematics Transceiver)
Telephone and GPS antenna assembly (for Roof Side)
Telephone and GPS antenna cord (Antenna cord sub-assembly (for Type A))
Telephone and GPS antenna cord (Antenna cord sub-assembly (for Type B))
Telephone and GPS antenna cord (No. 2 antenna cord sub-assembly)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

Before performing this diagnostic procedure, make sure to perform Health Check and confirm that the DCM/VIN registration information is correct.
Click here
Refer to "PARTS LOCATION" for the installation location of telephone and GPS antenna cord.
Click here

PROCEDURE

CHECK DTC

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Clear the DTCs.

Body Electrical > Telematics > Clear DTCs

(f) Recheck for DTCs.

Body Electrical > Telematics > Trouble Codes

Result	Proceed to
DTC B15C0 or B15C1 is output	A
DTC B15C0 or B15C1 is not output	B

CHECK FOR INTERMITTENT PROBLEMS

2.	INSPECT TELEPHONE AND GPS ANTENNA CORD (NO. 2 ANTENNA CORD SUB-ASSEMBLY)

(a) Disconnect the E telephone and GPS antenna cord (No. 2 antenna cord sub-assembly) connector.

*a	Component without harness connected (Telephone and GPS Antenna Cord (No. 2 Antenna Cord Sub-assembly))

(b) Disconnect the B telephone and GPS antenna cord (No. 2 antenna cord sub-assembly) connector.

*a	Component without harness connected (Telephone and GPS Antenna Cord (No. 2 Antenna Cord Sub-assembly))

Standard Resistance:

Tester Connection	Condition	Specified Condition
E-2 - B-1	Always	Below 1 Ω
E-2 or B-1 - Body ground	Always	10 kΩ or higher
E-2a - B-1a	Always	Below 1 Ω
E-2a or B-1a - Body ground	Always	10 kΩ or higher

REPLACE TELEPHONE AND GPS ANTENNA CORD (NO. 2 ANTENNA CORD SUB-ASSEMBLY)

3.	INSPECT TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY (for Type A))

(a) Disconnect the F telephone and GPS antenna cord (antenna cord sub-assembly (for Type A)) connector.

*a	Component without harness connected (Telephone and GPS Antenna Cord (Antenna Cord Sub-assembly (for Type A)))

(b) Disconnect the G telephone and GPS antenna cord (antenna cord sub-assembly (for Type A)) connector.

*a	Component without harness connected (Telephone and GPS Antenna Cord (Antenna Cord Sub-assembly (for Type A)))

Standard Resistance:

Tester Connection	Condition	Specified Condition
F-2 - G-4	Always	Below 1 Ω
F-2 or G-4 - Body ground	Always	10 kΩ or higher
F-2a - G-4a	Always	Below 1 Ω
F-2a or G-4a - Body ground	Always	10 kΩ or higher

REPLACE TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY (for Type A))

4.	INSPECT TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY (for Type B))

(a) Disconnect the I telephone and GPS antenna cord (antenna cord sub-assembly (for Type B)) connector.

*a	Component without harness connected (Telephone and GPS Antenna Cord (Antenna Cord Sub-assembly (for Type B)))

(b) Disconnect the H telephone and GPS antenna cord (antenna cord sub-assembly (for Type B)) connector.

*a	Component without harness connected (Telephone and GPS Antenna Cord (Antenna Cord Sub-assembly (for Type B)))

Standard Resistance:

Tester Connection	Condition	Specified Condition
I-5 - H-4	Always	Below 1 Ω
I-5 or H-4 - Body ground	Always	10 kΩ or higher
I-5a - H-4a	Always	Below 1 Ω
I-5a or H-4a - Body ground	Always	10 kΩ or higher

REPLACE TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY (for Type B))

5.	REPLACE TELEPHONE AND GPS ANTENNA ASSEMBLY (for Roof Side)

(a) Replace the telephone and GPS antenna assembly (for Roof Side) with a new or known good one and check if the same problem occurs again.

Click here

OK:

The system returns to normal.

END

6.	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