Lexus ES manuals

Lexus ES: Telephone Main Antenna Circuit Short to Ground (B15CB11,B15CB13)

DESCRIPTION

This DTC is stored when the DCM (telematics transceiver) detects an open or a short in the telephone antenna (main) circuit.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15CB11

Telephone Main Antenna Circuit Short to Ground

Telephone antenna (main) impedance (Ω) 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 assembly (for Roof Side)
  • Telephone and GPS antenna cord (antenna cord sub-assembly)
  • Telephone and GPS antenna cord (No. 2 antenna cord sub-assembly)
  • Telephone and GPS antenna cord (No. 3 antenna cord sub-assembly)

B15CB13

Telephone Main Antenna Circuit Open

Telephone antenna (main) impedance (Ω) 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 assembly (for Roof Side)
  • Telephone and GPS antenna cord (antenna cord sub-assembly)
  • Telephone and GPS antenna cord (No. 2 antenna cord sub-assembly)
  • Telephone and GPS antenna cord (No. 3 antenna cord sub-assembly)

WIRING DIAGRAM

w/ SXM Function w/o SXM Function

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

PROCEDURE

1.

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

2.

INSPECT TELEPHONE AND GPS ANTENNA ASSEMBLY (for Roof Side)

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

*a

Component without harness connected

(Telephone and GPS Antenna Assembly (for Roof Side))

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

4 - 4a

Always

9 to 11 kΩ

NG

REPLACE TELEPHONE AND GPS ANTENNA ASSEMBLY (for Roof Side)

OK

3.

INSPECT TELEPHONE AND GPS ANTENNA CORD (NO. 3 ANTENNA CORD SUB-ASSEMBLY)

(a) Disconnect the I telephone and GPS antenna cord (No. 3 antenna cord sub-assembly) connector.

*a

Component without harness connected (Telephone and GPS Antenna Cord (No. 3 Antenna Cord Sub-assembly))

(b) Disconnect the H telephone and GPS antenna cord (No. 3 antenna cord sub-assembly) connector.

*a

Component without harness connected (Telephone and GPS Antenna Cord (No. 3 Antenna Cord Sub-assembly))

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I-4 - H-6

Always

Below 1 Ω

I-4 or H-6 - Body ground

Always

10 kΩ or higher

I-4a - H-6a

Always

Below 1 Ω

I-4a or H-6a - Body ground

Always

10 kΩ or higher

NG

REPLACE TELEPHONE AND GPS ANTENNA CORD (NO. 3 ANTENNA CORD SUB-ASSEMBLY)

OK

4.

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

(a) Disconnect the G 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 K*1 or F*2 telephone and GPS antenna cord (No. 2 antenna cord sub-assembly) connector.

w/ SXM Function

*a

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

w/o SXM Function

*a

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

  • *1: w/ SXM Function
  • *2: w/o SXM Function

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

Standard Resistance:

w/ SXM Function

Tester Connection

Condition

Specified Condition

G-6 - K-3

Always

Below 1 Ω

G-6 or K-3 - Body ground

Always

10 kΩ or higher

G-6a - K-3a

Always

Below 1 Ω

G-6a or K-3a - Body ground

Always

10 kΩ or higher

w/o SXM Function

Tester Connection

Condition

Specified Condition

G-6 - F-2

Always

Below 1 Ω

G-6 or F-2 - Body ground

Always

10 kΩ or higher

G-6a - F-2a

Always

Below 1 Ω

G-6a or F-2a - Body ground

Always

10 kΩ or higher

NG

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

OK

5.

INSPECT TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY)

(a) Disconnect the J*1 or E*2 telephone and GPS antenna cord (antenna cord sub-assembly) connector.

w/ SXM Function

*a

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

w/o SXM Function

*a

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

  • *1: w/ SXM Function
  • *2: w/o SXM Function

(b) Disconnect the C telephone and GPS antenna cord (antenna cord sub-assembly) connector.

*a

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

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

Standard Resistance:

w/ SXM Function

Tester Connection

Condition

Specified Condition

J-3 - C-1

Always

Below 1 Ω

J-3 or C-1 - Body ground

Always

10 kΩ or higher

J-3a - C-1a

Always

Below 1 Ω

J-3a or C-1a - Body ground

Always

10 kΩ or higher

w/o SXM Function

Tester Connection

Condition

Specified Condition

E-2 - C-1

Always

Below 1 Ω

E-2 or C-1 - Body ground

Always

10 kΩ or higher

E-2a - C-1a

Always

Below 1 Ω

E-2a or C-1a - Body ground

Always

10 kΩ or higher

NG

REPLACE TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY)

OK

6.

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.

OK

END

NG

7.

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.
NEXT

PERFORM DCM ACTIVATION

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