Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001O4FI
Model Year Start: 2021 Model: GR Corolla Prod Date Range: [04/2020 - 09/2022]
Title: CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for Gasoline Model): B15C111,B15C113; GNSS Antenna Circuit Short to Ground; 2021 - 2022 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 09/2022]

DTC

B15C111

GNSS Antenna Circuit Short to Ground

DTC

B15C113

GNSS Antenna Circuit Open

DESCRIPTION

These DTCs are stored when a malfunction occurs in the telephone and GPS antenna (for Roof Side) circuit.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15C111

GNSS Antenna Circuit Short to Ground

Current to the GNSS antenna is lower than the malfunction threshold for 10 seconds or more when the engine switch is on (IG)

(Short circuit)
  • DCM (telematics transceiver)
  • Telephone and GPS antenna (for Roof Side)
  • Telephone and GPS antenna cord (No. 2 antenna cord sub-assembly)
  • Telephone and GPS antenna cord (antenna cord sub-assembly (for Type A))
  • Telephone and GPS antenna cord (antenna cord sub-assembly (for Type B))

B15C113

GNSS Antenna Circuit Open

Current to the GNSS antenna is higher than the malfunction threshold for 10 seconds or more when the engine switch is on (IG)

(Open circuit)
  • DCM (telematics transceiver)
  • Telephone and GPS antenna (for Roof Side)
  • Telephone and GPS antenna cord (No. 2 antenna cord sub-assembly)
  • Telephone and GPS antenna cord (antenna cord sub-assembly (for Type A))
  • Telephone and GPS antenna cord (antenna cord sub-assembly (for Type B))

WIRING DIAGRAM

for Sedan Model (w/ SXM Function)
for Sedan Model (w/o SXM Function)
for Hatchback Model

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 Safety Connect System.

Click here 2021 - 2022 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 09/2022]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for Gasoline Model): PRECAUTION

PROCEDURE

1.

CHECK MODEL

(a) Choose the model to be inspected.

Result

Proceed to

for Sedan Model

A

for Hatchback Model

B
B

GO TO STEP 8

A

2.

CHECK DTC

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine 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.

OK

USE SIMULATION METHOD TO CHECK

NG

3.

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

(a) Disconnect the antenna connector from the telephone and GPS antenna (for Roof Side).

*a

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

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

w/ SXM Function

*a

Component without harness connected (Telephone and GPS Antenna Cord (Antenna Cord Sub-assembly (for Type B)))
w/o SXM Function

*a

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

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

Standard Resistance:

w/ SXM Function

Tester Connection

Condition

Specified Condition

I-5 - H-2

Always

Below 1 Ω

I-5a - H-2a

Always

Below 1 Ω

I-5 or H-2 - Body ground

Always

10 kΩ or higher

w/o SXM Function

Tester Connection

Condition

Specified Condition

I-5 - K-2

Always

Below 1 Ω

I-5a - K-2a

Always

Below 1 Ω

I-5 or K-2 - Body ground

Always

10 kΩ or higher
NG

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

OK

4.

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

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

w/ SXM Function

*a

Component without harness connected (Telephone and GPS Antenna Cord (Antenna Cord Sub-assembly (for Type A)))
w/o SXM Function

*a

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

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

*a

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

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

Standard Resistance:

w/ SXM Function

Tester Connection

Condition

Specified Condition

G-2 - F-2

Always

Below 1 Ω

G-2a - F-2a

Always

Below 1 Ω

G-2 or F-2 - Body ground

Always

10 kΩ or higher

w/o SXM Function

Tester Connection

Condition

Specified Condition

J-2 - F-2

Always

Below 1 Ω

J-2a - F-2a

Always

Below 1 Ω

J-2 or F-2 - Body ground

Always

10 kΩ or higher
NG

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

OK

5.

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

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

*a

Component without harness connected

(Telephone and GPS Antenna Cord (No. 2 Antenna Cord Sub-assembly))

(b) Disconnect the antenna connector from the DCM (telematics transceiver).

*a

Component without harness connected

(Telephone and GPS Antenna Cord (No. 2 Antenna Cord Sub-assembly))

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

E-2 - B-1

Always

Below 1 Ω

E-2a - B-1a

Always

Below 1 Ω

E-2 or B-1 - Body ground

Always

10 kΩ or higher
NG

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

OK

6.

CHECK TELEPHONE AND GPS ANTENNA (FOR ROOF SIDE)

(a) Replace the telephone and GPS antenna (for Roof Side) with a known good one.

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; CELLULAR COMMUNICATION: TELEPHONE AND GPS ANTENNA (for Roof Side): REMOVAL

(b) Clear the DTCs.

Body Electrical > Telematics > Clear DTCs

(c) Recheck for DTCs and check that no DTCs are output.

Body Electrical > Telematics > Trouble Codes

OK:

No DTCs are output.

OK

END (TELEPHONE AND GPS ANTENNA (FOR ROOF SIDE) IS DEFECTIVE)
NG

7.

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

NOTICE:

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

PERFORM DCM ACTIVATION

8.

CHECK DTC

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine 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.

OK

USE SIMULATION METHOD TO CHECK

NG

9.

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

(a) Disconnect the antenna connector from the telephone and GPS antenna (for Roof Side).

*a

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

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

*a

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I-5 - O-4

Always

Below 1 Ω

I-5a - O-4a

Always

Below 1 Ω

I-5 or O-4 - Body ground

Always

10 kΩ or higher
NG

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

OK

10.

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

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

*a

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

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

*a

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

N-4 - F-2

Always

Below 1 Ω

N-4a - F-2a

Always

Below 1 Ω

N-4 or F-2 - Body ground

Always

10 kΩ or higher
NG

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

OK

11.

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

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

*a

Component without harness connected

(Telephone and GPS Antenna Cord (No. 2 Antenna Cord Sub-assembly))

(b) Disconnect the antenna connector from the DCM (telematics transceiver).

*a

Component without harness connected

(Telephone and GPS Antenna Cord (No. 2 Antenna Cord Sub-assembly))

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

E-2 - B-1

Always

Below 1 Ω

E-2a - B-1a

Always

Below 1 Ω

E-2 or B-1 - Body ground

Always

10 kΩ or higher
NG

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

OK

12.

CHECK TELEPHONE AND GPS ANTENNA (FOR ROOF SIDE)

(a) Replace the telephone and GPS antenna (for Roof Side) with a known good one.

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; CELLULAR COMMUNICATION: TELEPHONE AND GPS ANTENNA (for Roof Side): REMOVAL

(b) Clear the DTCs.

Body Electrical > Telematics > Clear DTCs

(c) Recheck for DTCs and check that no DTCs are output.

Body Electrical > Telematics > Trouble Codes

OK:

No DTCs are output.

OK

END (TELEPHONE AND GPS ANTENNA (FOR ROOF SIDE) IS DEFECTIVE)
NG

13.

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

NOTICE:

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

PERFORM DCM ACTIVATION