Lexus NX: Short in GPS Antenna (B15C0,B15C1)
DESCRIPTION
These DTCs are stored when a malfunction occurs in the navigation antenna assembly.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B15C0 | Short in GPS Antenna | Navigation antenna error |
|
| B15C1 | Open in GPS Antenna | Error of the power source to the navigation antenna |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When replacing the radio receiver assembly or navigation ECU, always replace it with a new one.
If a radio receiver assembly or navigation ECU which was installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The radio receiver assembly or navigation ECU 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 Navigation System.
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PROCEDURE
| 1. | CHECK DTC |
(a) Clear the DTCs.
Click here
(b) Recheck for DTCs and check that no DTCs are output.
Click here
OK:
No DTCs are output.
| OK | .gif) | USE SIMULATION METHOD TO CHECK |
|
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| 2. | INSPECT NAVIGATION ANTENNA ASSEMBLY |
(a) Remove the navigation antenna assembly.
Click here
(b) Inspect the navigation antenna assembly.
Click here
| NG | | REPLACE NAVIGATION ANTENNA ASSEMBLY |
|
| 3. | CHECK VEHICLE TYPE |
(a) Check the vehicle type.
| Result | Proceed to |
|---|---|
| w/ Manual (SOS) Switch | A |
| w/o Manual (SOS) Switch | B |
| B | | GO TO STEP 8 |
|
| 4. | CHECK 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-3 - I169-3 (GPS) | Always | Below 1 Ω |
| A-3a - I169-3a | Always | Below 1 Ω |
| A-3 - Body ground | Always | 10 kΩ or higher |
| A-3a - Body ground | Always | 10 kΩ or higher |
| NG | | REPLACE ANTENNA CORD SUB-ASSEMBLY |
|
| 5. | CHECK HARNESS AND CONNECTOR (ANTENNA CORD SUB-ASSEMBLY - NAVIGATION ECU) |
| (a) Disconnect the antenna cord sub-assembly connector. |
|
(b) Disconnect the navigation ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I169-3 (GPS) - I167-1 (GPS) | Always | Below 1 Ω |
| I169-3a - I167-1a | Always | Below 1 Ω |
| I169-3 (GPS) - Body ground | Always | 10 kΩ or higher |
| I169-3a - Body ground | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 6. | REPLACE NAVIGATION ECU |
(a) Replace the navigation ECU with a new one.
Click here
|
| 7. | CHECK DTC |
(a) Clear the DTCs.
Click here
(b) Recheck for DTCs and check that no DTCs are output.
Click here
OK:
No DTCs are output.
| OK | | END (NAVIGATION ECU IS DEFECTIVE) |
| NG | | REPLACE RADIO RECEIVER ASSEMBLY |
| 8. | CHECK 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-3 - I147-1 (GPS) | Always | Below 1 Ω |
| A-3a - I147-1a | Always | Below 1 Ω |
| A-3 - Body ground | Always | 10 kΩ or higher |
| A-3a - Body ground | Always | 10 kΩ or higher |
| NG | | REPLACE ANTENNA CORD SUB-ASSEMBLY |
|
| 9. | CHECK HARNESS AND CONNECTOR (ANTENNA CORD SUB-ASSEMBLY - NAVIGATION ECU) |
| (a) Disconnect the antenna cord sub-assembly connector. |
|
(b) Disconnect the navigation ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I147-1 (GPS) - I167-1 (GPS) | Always | Below 1 Ω |
| I147-1a - I167-1a | Always | Below 1 Ω |
| I147-1 (GPS) - Body ground | Always | 10 kΩ or higher |
| I147-1a - Body ground | Always | 10 kΩ or higher |
| OK | | GO TO STEP 6 |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
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DESCRIPTION Navigation system components communicate with each other via MOST communication. If a line short or short to ground occurs in a MOST communication line, communication will not be possible
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