Lexus NX manuals

Lexus NX: XM Tuner Antenna Disconnected (B15FE,B15FF)

Lexus NX Service Manual / Audio & Visual & Telematics / Navigation / Multi Info Display / Navigation System / 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.
  • No. 1 antenna cord sub-assembly
  • No. 2 antenna cord sub-assembly
  • No. 4 antenna cord sub-assembly
  • Roof antenna assembly
  • Radio receiver assembly

B15FF

XM Tuner Antenna Short

A short occurs in the roof antenna assembly.
  • No. 1 antenna cord sub-assembly
  • No. 2 antenna cord sub-assembly
  • No. 4 antenna cord sub-assembly
  • Roof antenna assembly
  • Radio receiver 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 Navigation System.

Click here

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

SECURELY CONNECT ROOF ANTENNA ASSEMBLY CABLE
OK

2.

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

3.

CHECK NO. 4 ANTENNA CORD SUB-ASSEMBLY

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

*a

Front view of wire harness connector

(to Roof Antenna Assembly)

*b

Front view of wire harness connector

(to No. 2 Antenna Cord Sub-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

OK

4.

CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY

(a) Disconnect the antenna connector from the No. 4 antenna cord sub-assembly.

*a

Front view of wire harness connector

(to No. 4 Antenna Cord Sub-assembly)

*b

Front view of wire harness connector

(to No. 1 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

OK

5.

CHECK NO. 1 ANTENNA CORD SUB-ASSEMBLY

(a) Disconnect the antenna connector from the No. 2 antenna cord sub-assembly.

*a

Front view of wire harness connector

(to No. 2 Antenna Cord Sub-assembly)

*b

Front view of wire harness connector

(to Radio Receiver 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

OK

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

Body Electrical > Navigation System > Clear DTCs

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

Click here

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

END (ROOF ANTENNA ASSEMBLY IS DEFECTIVE)
NG

REPLACE RADIO RECEIVER ASSEMBLY

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