Lexus NX: Telephone Sub Antenna Circuit Short to Ground (B153711,B153713)
DESCRIPTION
These DTCs are stored when a malfunction occurs in the telephone antenna (navigation antenna assembly)
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B153711 | Telephone Sub Antenna Circuit Short to Ground | Telephone antenna (sub) impedance (Ω) is lower than the malfunction threshold for 10 seconds or more when the power switch is on (IG). (Short circuit) |
|
| B153713 | Telephone Sub Antenna Circuit Open | Telephone antenna (sub) impedance (Ω) is higher than the malfunction threshold for 10 seconds or more when the power switch is on (IG). (Open circuit) |
|
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 Safety Connect System.
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HINT:
Refer to "PARTS LOCATION" for the installation location of telephone antenna cord.
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PROCEDURE
| 1. | CHECK DTC |
(a) Turn the power switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (IG) and wait for 10 seconds or more.
(d) Turn the Techstream on.
(e) Check for DTCs and check that no DTCs are output.
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OK:
No DTCs are output.
| OK | .gif) | USE SIMULATION METHOD TO CHECK |
|
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| 2. | INSPECT TELEPHONE ANTENNA (NAVIGATION ANTENNA ASSEMBLY) |
(a) Remove the telephone antenna (navigation antenna assembly).
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(b) Inspect the telephone antenna (navigation antenna assembly).
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| NG | | REPLACE TELEPHONE ANTENNA (NAVIGATION ANTENNA ASSEMBLY) |
|
| 3. | INSPECT TELEPHONE ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY) |
| (a) Disconnect the antenna connector from the navigation antenna assembly. |
|
(b) Disconnect the antenna connector from the wire harness.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A-4 - I169-4 (TEL) | Always | Below 1 Ω |
| A-4a - I169-4a | Always | Below 1 Ω |
| A-4 - Body ground | Always | 10 kΩ or higher |
| NG | | REPLACE TELEPHONE ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY) |
|
| 4. | CHECK HARNESS AND CONNECTOR (ANTENNA CORD SUB-ASSEMBLY - DCM [TELEMATICS TRANSCEIVER]) |
| (a) Disconnect the antenna cord sub-assembly connector. |
|
(b) Disconnect the DCM (telematics transceiver) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I169-4 (TEL) - I186-1 (TEL [ANT3]) | Always | Below 1 Ω |
| I169-4a - I169-1a | Always | Below 1 Ω |
| I169-4 (TEL) - Body ground | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 5. | CHECK TELEPHONE ANTENNA (NAVIGATION ANTENNA ASSEMBLY) |
(a) Replace the telephone antenna (navigation antenna assembly) with a known good one.
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(b) Clear the DTCs.
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(c) Recheck for DTCs and check that no DTCs are output.
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OK:
No DTCs are output.
| OK | | END (TELEPHONE ANTENNA [NAVIGATION ANTENNA ASSEMBLY] IS DEFECTIVE) |
|
| 6. | REPLACE DCM (TELEMATICS TRANSCEIVER) |
(a) Replace the DCM (telematics transceiver).
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NOTICE:
- The power switch must be off.
- Do not exchange the DCM (telematics transceiver) with one from another vehicle.
| NEXT | | PERFORM DCM ACTIVATION |
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