Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: GNSS Antenna Circuit Short to Ground (B15C111,B15C113)

Toyota Corolla Cross (2022-2024) Service Manual / Audio & Visual & Telematics / Cellular Communication / Safety Connect System / GNSS Antenna Circuit Short to Ground (B15C111,B15C113)

DESCRIPTION

These DTCs are stored when a malfunction occurs in the roof antenna assembly circuit.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15C111

GNSS Antenna Circuit Short to Ground

Current to the roof antenna assembly is lower than the malfunction threshold for 10 seconds or more when the ignition switch is ON

(Short circuit)
  • DCM (telematics transceiver)
  • Roof antenna assembly
  • Antenna cord sub-assembly
  • No. 2 antenna cord sub-assembly
  • No. 3 antenna cord sub-assembly

B15C113

GNSS Antenna Circuit Open

Current to the roof antenna assembly is higher than the malfunction threshold for 10 seconds or more when the ignition switch is ON

(Open circuit)
  • DCM (telematics transceiver)
  • Roof antenna assembly
  • Antenna cord sub-assembly
  • No. 2 antenna cord sub-assembly
  • No. 3 antenna cord sub-assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Telematics System.

    Click here

  • When replacing the DCM (telematics transceiver), make sure to replace it with a new one.

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Telematics > Clear DTCs
NEXT

2.

CHECK DTC

(a) Turn the ignition switch to ON and wait for 10 seconds or more.

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

Body Electrical > Telematics > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTC B15C111 or B15C113 is output

B
A

USE SIMULATION METHOD TO CHECK

B

3.

CHECK NO. 3 ANTENNA CORD SUB-ASSEMBLY

(a) Disconnect the No. 3 antenna cord sub-assembly from the roof antenna assembly connector.

*a

Front view of wire harness connector

(to Roof Antenna Assembly)

*b

Front view of wire harness connector

(to No. 2 Antenna Cord Sub-assembly)

(b) Disconnect the No. 3 antenna cord sub-assembly from the No. 2 antenna cord sub-assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

J-5 - I-4

Always

Below 1 Ω

J-5a - I-4a

Always

Below 1 Ω

J-5 or I-4 - Body ground

Always

10 kΩ or higher
NG

REPLACE NO. 3 ANTENNA CORD SUB-ASSEMBLY

OK

4.

CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY

(a) Disconnect the No. 2 antenna cord sub-assembly from the No. 3 antenna code sub-assembly connector.

*a

Front view of wire harness connector

(to Antenna Cord Sub-assembly)

*b

Front view of wire harness connector

(to No. 3 Antenna Cord Sub-assembly)

(b) Disconnect the No. 2 antenna cord sub-assembly from the antenna cord sub-assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

H-4 - G-4

Always

Below 1 Ω

H-4a - G-4a

Always

Below 1 Ω

H-4 or G-4 - Body ground

Always

10 kΩ or higher
NG

REPLACE NO.2 ANTENNA CORD SUB-ASSEMBLY

OK

5.

INSPECT ANTENNA CORD SUB-ASSEMBLY

(a) Disconnect the antenna cord sub-assembly connector from the No. 2 antenna cord sub-assembly.

*a

Front view of wire harness connector

(DCM (Telematics Transceiver))

*b

Front view of wire harness connector

(to No. 2 Antenna Cord Sub-assembly)

(b) Disconnect the antenna cord sub-assembly connector from the DCM (telematics transceiver).

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

D-1 - F-4

Always

Below 1 Ω

D-1a - F-4a

Always

Below 1 Ω

D-1 or F-4 - Body ground

Always

10 kΩ or higher
NG

REPLACE ANTENNA CORD SUB-ASSEMBLY

OK

6.

REPLACE ROOF ANTENNA ASSEMBLY

(a) Replace the roof antenna assembly with a new or known good one.

HINT:

Click here

NEXT

7.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Telematics > Clear DTCs
NEXT

8.

CHECK DTC

(a) Turn the ignition switch to ON and wait for 10 seconds or more.

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

Body Electrical > Telematics > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTC B15C111 or B15C113 is output

B
A

END (ROOF ANTENNA ASSEMBLY IS DEFECTIVE)
B

9.

REPLACE DCM(TELEMATICS TRANSCEIVER)

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

HINT:

Click here

NEXT

PERFORM DCM ACTIVATION

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