Lexus NX: XM Tuner Antenna Disconnected (B15FE,B15FF)
DESCRIPTION
These DTCs are stored when a malfunction occurs in the roof antenna assembly which is connected to the radio receiver assembly.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B15FE | XM Tuner Antenna Disconnected | The roof antenna assembly is not connected. |
|
| B15FF | XM Tuner Antenna Short | A short occurs in the roof antenna assembly. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When replacing the radio receiver assembly, always replace it with a new one.
If a radio receiver assembly which was installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The radio receiver assembly may not operate normally.
HINT:
Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.
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PROCEDURE
| 1. | CHECK CONNECTION OF ANTENNA CABLE |
(a) Check if the roof antenna assembly cable is securely connected to the radio receiver assembly.
OK:
Roof antenna assembly cable is securely connected.
| NG | .gif) | SECURELY CONNECT ROOF ANTENNA ASSEMBLY CABLE |
|
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| 2. | CHECK DTC |
(a) Clear the DTCs.
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(b) Recheck for DTCs and check that no DTCs are output.
Click here
OK:
No DTCs are output.
| OK | | USE SIMULATION METHOD TO CHECK |
|
| 3. | CHECK NO. 4 ANTENNA CORD SUB-ASSEMBLY |
| (a) Disconnect the antenna connector from the roof antenna assembly. |
|
(b) Disconnect the antenna connector from the 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 |
|---|---|---|
| A-3 - B-3 | Always | Below 1 Ω |
| A-3a - B-3a | Always | Below 1 Ω |
| A-3 - Body ground | Always | 10 kΩ or higher |
| A-3a - Body ground | Always | 10 kΩ or higher |
| NG | | REPLACE NO. 4 ANTENNA CORD SUB-ASSEMBLY |
|
| 4. | CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY |
| (a) Disconnect the antenna connector from the No. 4 antenna cord sub-assembly. |
|
(b) Disconnect the antenna connector from the No. 1 antenna cord sub-assembly.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| B-3 - C-3 | Always | Below 1 Ω |
| B-3a - C-3a | Always | Below 1 Ω |
| B-3 - Body ground | Always | 10 kΩ or higher |
| B-3a - Body ground | Always | 10 kΩ or higher |
| NG | | REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY |
|
| 5. | CHECK NO. 1 ANTENNA CORD SUB-ASSEMBLY |
| (a) Disconnect the antenna connector from the No. 2 antenna cord sub-assembly. |
|
(b) Disconnect the antenna connector from the radio receiver assembly.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| C-3 - D-1 (SXM) | Always | Below 1 Ω |
| C-3a - D-1a | Always | Below 1 Ω |
| C-3 - Body ground | Always | 10 kΩ or higher |
| C-3a - Body ground | Always | 10 kΩ or higher |
| NG | | REPLACE NO. 1 ANTENNA CORD SUB-ASSEMBLY |
|
| 6. | CHECK ROOF ANTENNA ASSEMBLY |
(a) Replace the roof antenna assembly with a new or known good one.
Click here
(b) Clear the DTCs.
Click here
(c) Recheck for DTCs and check that no DTCs are output.
Click here
OK:
No DTCs are output.
| OK | | END (ROOF ANTENNA ASSEMBLY IS DEFECTIVE) |
| NG | | REPLACE RADIO RECEIVER ASSEMBLY |
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