Lexus ES: GNSS Antenna Circuit Short to Ground (B15C111,B15C113)
DESCRIPTION
These DTCs are stored when a malfunction occurs in the telephone and GPS antenna assembly (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) |
|
| 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) |
|
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.
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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 CodesOK:
No DTCs are output.
| OK |  | USE SIMULATION METHOD TO CHECK |
|
| 2. | 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)) |
| *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 B telephone and GPS antenna cord (antenna cord sub-assembly) connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
w/ SXM Function| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J-4 - B-1 | Always | Below 1 Ω |
| J-4 or B-1 - Body ground | Always | 10 kΩ or higher |
| J-4a - B-1a | Always | Below 1 Ω |
| J-4a or B-1a - Body ground | Always | 10 kΩ or higher |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| E-1 - B-1 | Always | Below 1 Ω |
| E-1 or B-1 - Body ground | Always | 10 kΩ or higher |
| E-1a - B-1a | Always | Below 1 Ω |
| E-1a or B-1a - Body ground | Always | 10 kΩ or higher |
| NG | | REPLACE TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY) |
|
| 3. | INSPECT TELEPHONE AND GPS ANTENNA CORD (NO. 2 ANTENNA CORD SUB-ASSEMBLY) |
(a) 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)) |
| *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
| (b) Disconnect the G telephone and GPS antenna cord (No. 2 antenna cord sub-assembly) connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
w/ SXM Function| Tester Connection | Condition | Specified Condition |
|---|---|---|
| K-4 - G-5 | Always | Below 1 Ω |
| K-4 or G-5 - Body ground | Always | 10 kΩ or higher |
| K-4a - G-5a | Always | Below 1 Ω |
| K-4a or G-5a - Body ground | Always | 10 kΩ or higher |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| F-1 - G-5 | Always | Below 1 Ω |
| F-1 or G-5 - Body ground | Always | 10 kΩ or higher |
| F-1a - G-5a | Always | Below 1 Ω |
| F-1a or G-5a - Body ground | Always | 10 kΩ or higher |
| NG | | REPLACE TELEPHONE AND GPS ANTENNA CORD (NO. 2 ANTENNA CORD SUB-ASSEMBLY) |
|
| 4. | 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. |
|
| (b) Disconnect the H telephone and GPS antenna cord (No. 3 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 |
|---|---|---|
| I-2 - H-5 | Always | Below 1 Ω |
| I-2 or H-5 - Body ground | Always | 10 kΩ or higher |
| I-2a - H-5a | Always | Below 1 Ω |
| I-2a or H-5a - Body ground | Always | 10 kΩ or higher |
| NG | | REPLACE TELEPHONE AND GPS ANTENNA CORD (NO. 3 ANTENNA CORD SUB-ASSEMBLY) |
|
| 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.
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OK:
The system returns to normal.
| OK | | END |
|
| 6. | REPLACE DCM (TELEMATICS TRANSCEIVER) |
(a) Replace the DCM (Telematics Transceiver).
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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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SEE MORE:
Reassembly
REASSEMBLY CAUTION / NOTICE / HINT NOTICE:
When using a vise, place aluminum plates between the part and vise.
When using a vise, do not overtighten it.
HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE 1. INSTALL OUTBOARD
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