Lexus NX: Stereo Component Amplifier Disconnected (B15D3)

Lexus NX Service Manual / Audio & Visual & Telematics / Audio / Video / Audio And Visual System / Stereo Component Amplifier Disconnected (B15D3)

DESCRIPTION

The radio receiver assembly and stereo component amplifier assembly are connected by the AVC-LAN communication line.

This DTC is stored when an AVC-LAN communication error occurs between the radio receiver assembly and stereo component amplifier assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15D3

Stereo Component Amplifier Disconnected

A device that is listed in the AVC-LAN connected device record of the master unit is missing.

  • Stereo component amplifier assembly power source circuit
  • AVC-LAN circuit between radio receiver assembly and stereo component amplifier assembly
  • Stereo component amplifier assembly
  • Radio receiver assembly
  • Harness or connector

HINT:

For the AVC-LAN communication line, the radio receiver assembly is the master unit.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • 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) If DTC B15C3 is output, perform troubleshooting for DTC B15C3 first.

Body Electrical > Navigation System > Trouble Codes

OK:

DTC B15C3 is not output.

NG

GO TO DTC B15C3

OK

2.

CHECK OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

(a) Check that optional components (including associated wiring) which generate radio waves are not installed.

Result

Proceed to

Optional components (including associated wiring) are installed.

A

Optional components (including associated wiring) are not installed.

B

HINT:

  • Electrical noise from radio waves generated by optional components or the wiring for those components may affect AVC-LAN communication.
  • This DTC may be stored when a AVC-LAN communication error occurs due to electrical noise.
B

GO TO STEP 5

A

3.

REMOVE OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING) (INCLUDING ASSOCIATED WIRING)

(a) Remove optional components (including associated wiring).

NOTICE:

Do not remove optional components or associated wiring without the permission of the customer.

NEXT

4.

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

END (COMMUNICATION MALFUNCTION DUE TO NOISE)

NG

5.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - BATTERY AND BODY GROUND)

(a) Disconnect the stereo component amplifier assembly connector.

*a

Front view of wire harness connector

(to Stereo Component Amplifier Assembly)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

P32-3 (GND) - Body ground

Always

Below 1 Ω

P32-18 (GND2) - Body ground

Always

Below 1 Ω

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

P32-16 (+B2) - Body ground

Power switch off

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.

INSPECT RADIO RECEIVER ASSEMBLY (TX1+, TX1-)

(a) Remove the radio receiver assembly.

Click here

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

17 (TX2+) - 18 (TX2-)

Always

60 to 80 Ω

NG

REPLACE RADIO RECEIVER ASSEMBLY

OK

7.

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY)

(a) Disconnect the I151 radio receiver assembly connector.

(b) Disconnect the P46 stereo component amplifier assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I151-17 (TX2+) - P46-8 (TX+)

Always

Below 1 Ω

I151-18 (TX2-) - P46-7 (TX-)

Always

Below 1 Ω

I151-17 (TX2+) - Body ground

Always

10 kΩ or higher

I151-18 (TX2-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

8.

CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY

(a) Replace the stereo component amplifier 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 (STEREO COMPONENT AMPLIFIER ASSEMBLY IS DEFECTIVE)

NG

REPLACE RADIO RECEIVER ASSEMBLY

READ NEXT:

 Display Disconnected (B15D6)

DESCRIPTION The multi-display assembly and radio receiver assembly are connected by the AVC-LAN communication line. This DTC is stored when an AVC-LAN communication error occurs between the multi-disp

 Telematics Transceiver Disconnected (B15DB)

DESCRIPTION If the radio receiver assembly cannot detect the DCM (telematics transceiver) for a certain period of time (90 seconds) after the power switch is turned on (IG) and the radio receiver asse

 Air Conditioner ECU Vehicle Information Reading/Writing Processor Malfunction (B15F5)

DESCRIPTION This DTC is stored when items controlled by the air conditioning amplifier assembly cannot be customized via the audio and visual system vehicle customization screen. HINT: The air conditi

SEE MORE:

 Removal

REMOVAL CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH and LH sides. The procedure listed below is for the LH side. PROCEDURE 1. REMOVE NO. 3 DECK BOARD SUB-ASSEMBLY Click here 2. REMOVE REAR DECK FLOOR BOX Click here 3. REMOVE DECK FLOOR BOX LH Click here 4. PRECAUTIO

 Camera ECU Malfunction (C1610)

DESCRIPTION This DTC is stored when a malfunction occurs in the park assist/monitoring section. DTC No. Detection Item DTC Detection Condition Trouble Area C1610 Camera ECU Malfunction Park assist/monitoring error Panoramic view monitor system PROCEDURE 1. CHECK DTC (a

© 2016-2024 Copyright www.lexunx.com