Toyota Venza: Stereo Component Amplifier Disconnected (B15D3)

Toyota Venza Service Manual / Navigation / Multi Info Display / Navigation System / Stereo Component Amplifier Disconnected (B15D3)

DESCRIPTION

The navigation receiver assembly and stereo component amplifier assembly are connected via AVC-LAN communication.

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

DTC No.	DTC Detection Condition	Trouble Area
B15D3	When either of the following conditions is met: The stereo component amplifier assembly is/was not connected while the ignition switch is/was ON or ACC Communication between the master unit and the stereo component amplifier assembly is not possible when the engine is started	Stereo component amplifier assembly power source circuit AVC-LAN circuit between navigation receiver assembly and stereo component amplifier assembly Stereo component amplifier assembly Navigation receiver assembly Harness or connector

HINT:

The navigation 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 inspection procedure.

PROCEDURE

CHECK DTC

(a) If DTC B15C3 is output, perform the troubleshooting for DTC B15C3 first.

Result	Proceed to
DTC B15C3 is not output.	A
DTC B15C3 is output.	B

GO TO DTC B15C3

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 an AVC-LAN communication error occurs due to electrical noise.

GO TO STEP 4

3.	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.

CHECK DTC

(a) Clear the DTCs (See page ).

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

OK:

No DTCs are output.

END

5.	CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY POWER SOURCE)

(a) Disconnect the E13 and E14 stereo component amplifier assembly connectors.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
E13-2 (GND) - Body ground	Always	Below 1 Ω
E13-6 (GND2) - Body ground	Always	Below 1 Ω

Standard Voltage:

Tester Connection	Condition	Specified Condition
E13-1 (+B) - E13-2 (GND)	Always	11 to 14 V
E13-3 (+B2) - E13-2 (GND)	Always	11 to 14 V
E14-12 (ACC) - E13-2 (GND)	Ignition switch ACC	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.	CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY)

(a) Disconnect the E40 navigation receiver assembly connector.

(b) Disconnect the E14 stereo component amplifier assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E40-7 (TX1+) - E14-8 (TX+)	Always	Below 1 Ω
E40-8 (TX1-) - E14-7 (TX-)	Always	Below 1 Ω
E40-7 (TX1+) - Body ground	Always	10 kΩ or higher
E40-8 (TX1-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.	REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

(a) Replace the stereo component amplifier assembly with a new or known good one (See page ).

(b) Clear the DTCs (See page ).

OK:

No DTCs are output.

END

REPLACE NAVIGATION RECEIVER ASSEMBLY

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