Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Display Disconnected (B15D6)

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Audio & Visual & Telematics / Navigation / Multi Info Display / Navigation System / Display Disconnected (B15D6)

DESCRIPTION

The multi-display assembly and radio receiver assembly are connected by AVC-LAN communication lines.

This DTC is stored when an AVC-LAN communication error occurs between the multi-display assembly and radio receiver assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15D6

Display Disconnected

A device that is listed in the AVC-LAN connected device record of the master unit is missing
  • Multi-display assembly power source circuit
  • AVC-LAN circuit between radio receiver assembly and multi-display assembly
  • Multi-display assembly
  • Radio receiver assembly
  • Harness or connector

HINT:

The radio receiver assembly is the master unit.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • 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

  • Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

CHECK OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

(a) Check for optional components.

(1) 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 an AVC-LAN communication error occurs due to electrical noise.
B

GO TO STEP 3

A

2.

REMOVE OPTIONAL COMPONENTS (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

3.

CHECK DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

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

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

END
NG

4.

CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY ASSEMBLY POWER SOURCE)

(a) Disconnect the J56 multi-display assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J56-13 (GND1) - 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

J56-12 (B) - J56-13 (GND1)

Always

11 to 14 V

J56-24 (ACC) - J56-13 (GND1)

Engine switch on (ACC)

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

5.

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - MULTI-DISPLAY ASSEMBLY)

(a) Disconnect the J148 radio receiver assembly connector.

(b) Disconnect the J56 multi-display assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J148-5 (TX1+) - J56-7 (TX+)

Always

Below 1 Ω

J148-6 (TX1-) - J56-19 (TX-)

Always

Below 1 Ω

J148-5 (TX1+) or J56-7 (TX+) - Body ground

Always

10 kΩ or higher

J148-6 (TX1-) or J56-19 (TX-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

6.

REPLACE MULTI-DISPLAY ASSEMBLY

(a) Replace the multi-display assembly with a new or known good one.

Click here

(b) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

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

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

END
NG

REPLACE RADIO RECEIVER ASSEMBLY

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