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

  • Navigation antenna assembly
  • Antenna cord sub-assembly
  • Radio receiver assembly
  • Harness or connector

B15C1

Open in GPS Antenna

Error of the power source to the navigation antenna

  • Navigation antenna assembly
  • Antenna cord sub-assembly
  • Radio receiver assembly
  • Harness or connector

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.

Click here

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs.

Click here

Body Electrical > Navigation System > Clear DTCs

(b) Recheck for DTCs and check that no DTCs are output.

Click here

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

USE SIMULATION METHOD TO CHECK

NG

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

OK

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 6

A

4.

CHECK ANTENNA CORD SUB-ASSEMBLY

(a) Disconnect the antenna connector from the navigation antenna assembly.

*a

Front view of wire harness connector

(to Navigation Antenna Assembly)

*b

Front view of wire harness connector

(to Wire Harness)

(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

OK

5.

CHECK HARNESS AND CONNECTOR (ANTENNA CORD SUB-ASSEMBLY - RADIO RECEIVER ASSEMBLY)

(a) Disconnect the antenna cord sub-assembly connector.

*a

Front view of wire harness connector

(to Antenna Cord Sub-assembly)

*b

Front view of wire harness connector

(to Radio Receiver Assembly)

(b) Disconnect the radio receiver assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I169-3 (GPS) - I181-1 (GPS)

Always

Below 1 Ω

I169-3a - I181-1a

Always

Below 1 Ω

I169-3 (GPS) - Body ground

Always

10 kΩ or higher

I169-3a - Body ground

Always

10 kΩ or higher

OK

REPLACE RADIO RECEIVER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.

CHECK ANTENNA CORD SUB-ASSEMBLY

(a) Disconnect the antenna connector from the navigation antenna assembly.

*a

Front view of wire harness connector

(to Navigation Antenna Assembly)

*b

Front view of wire harness connector

(to Wire Harness)

(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

OK

7.

CHECK HARNESS AND CONNECTOR (ANTENNA CORD SUB-ASSEMBLY - RADIO RECEIVER ASSEMBLY)

(a) Disconnect the antenna cord sub-assembly connector.

*a

Front view of wire harness connector

(to Antenna Cord Sub-assembly)

*b

Front view of wire harness connector

(to Radio Receiver Assembly)

(b) Disconnect the radio receiver assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I147-1 (GPS) - I181-1 (GPS)

Always

Below 1 Ω

I147-1a - I181-1a

Always

Below 1 Ω

I147-1 (GPS) - Body ground

Always

10 kΩ or higher

I147-1a - Body ground

Always

10 kΩ or higher

OK

REPLACE RADIO RECEIVER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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