Audio Video. Dtc B15D3 Stereo Component Amplifier Disconnected

The multi-media module receiver assembly and stereo component amplifier assembly are connected by the MOST communication line.
When a MOST communication error occurs between the multi-media module receiver assembly and stereo component amplifier assembly, this DTC is will be stored.

DTC Code	DTC Detection Condition	Trouble Area
B15D3	A device that is listed in the MOST network connected device record of the master unit is missing.	Harness or connector MOST circuit between multi-media module receiver assembly and stereo component amplifier assembly MOST circuit between multi-display controller sub-assembly and stereo component amplifier assembly* Stereo component amplifier assembly Multi-media module receiver assembly Multi-display controller sub-assembly*

*: w/ Rear Seat Entertainment System

HINT:

For the MOST network, the multi-media module receiver assembly is the master unit.

WIRING DIAGRAM

Land Cruiser. Urj200, 202 Grj200 Vdj200.Audio Video.Audio And Visual System (For Radio Receiver Type).
Dtc
B15D3 Stereo Component Amplifier Disconnected

INSPECTION PROCEDURE

NOTICE:

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

1.CHECK OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

Check that optional components (including associated wiring) which generate radio waves are not installed.
Result
Result
Proceed to
Optional components (including associated wiring) are installed.
A
Optional components (including associated wiring) are not installed.
B
HINT:
1. Electrical noise from radio waves generated by optional components or the wiring for those components may affect MOST communication.
2. This DTC may be stored when a MOST communication error occurs due to electrical noise.

Go to step 3

A

2.REMOVE OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

Remove optional components (including associated wiring).
NOTICE:
Do not remove optional components or associated wiring without the permission of the customer.

NEXT

3.CLEAR DTC

Clear the DTCs (Click here).

NEXT

4.CHECK FOR DTC

Recheck for DTCs and check if the same DTC is output again (Click here).
OK:
No DTCs are output.

Go to step 5

END (COMMUNICATION MALFUNCTION DUE TO NOISE)

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

Disconnect the stereo component amplifier assembly connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
F74-3 (GND) - Body ground
Always
Below 1 Ω
F74-18 (GND2) - Body ground
Always
Below 1 Ω

Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
Condition
Specified Condition
F74-1 (+B) - F74-3 (GND)
Always
11 to 14 V
F74-16 (+B2) - F74-3 (GND)
Always
11 to 14 V

Text in Illustration
*a	Front view of wire harness connector (to Stereo Component Amplifier Assembly)

Result
Result	Proceed to
OK (w/o Rear Seat Entertainment System)	A
OK (w/ Rear Seat Entertainment System)	B
NG	C

Go to step 10

REPAIR OR REPLACE HARNESS OR CONNECTOR

A

6.CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY)

Disconnect the F102 multi-media module receiver assembly connector.

Disconnect the F103 stereo component amplifier assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F102-2 (MI+) - F103-5 (MO+)	Always	Below 1 Ω
F102-3 (MI-) - F103-6 (MO-)	Always	Below 1 Ω
F102-4 (SLDI) - F103-7 (SLDO)	Always	Below 1 Ω
F102-5 (MO+) - F103-2 (MI+)	Always	Below 1 Ω
F102-6 (MO-) - F103-3 (MI-)	Always	Below 1 Ω
F102-7 (SLDO) - F103-4 (SLDI)	Always	Below 1 Ω
F102-2 (MI+) or F103-5 (MO+) - Body ground	Always	10 kΩ or higher
F102-3 (MI-) or F103-6 (MO-) - Body ground	Always	10 kΩ or higher
F102-4 (SLDI) or F103-7 (SLDO) - Body ground	Always	10 kΩ or higher
F102-5 (MO+) or F103-2 (MI+) - Body ground	Always	10 kΩ or higher
F102-6 (MO-) or F103-3 (MI-) - Body ground	Always	10 kΩ or higher
F102-7 (SLDO) or F103-4 (SLDI) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

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

NEXT

8.CLEAR DTC

Clear the DTCs (Click here).

NEXT

Go to step 10

9.CHECK FOR DTC

Recheck for DTCs and check if the same DTC is output again (Click here).
OK:
No DTCs are output.

REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY (Click here)

END (STEREO COMPONENT AMPLIFIER ASSEMBLY IS DEFECTIVE)

10.CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - MULTI-MEDIA MODULE RECEIVER ASSEMBLY AND MULTI-DISPLAY CONTROLLER SUB-ASSEMBLY)

Disconnect the F102 multi-media module receiver assembly connector.

Disconnect the F103 stereo component amplifier assembly connector.

Disconnect the L77 multi-display controller sub-assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F102-5 (MO+) - F103-2 (MI+)	Always	Below 1 Ω
F102-6 (MO-) - F103-3 (MI-)	Always	Below 1 Ω
F102-7 (SLDO) - F103-4 (SLDI)	Always	Below 1 Ω
F103-5 (MO+) - L77-2 (MI+)	Always	Below 1 Ω
F103-6 (MO-) - L77-3 (MI-)	Always	Below 1 Ω
F103-7 (SLDO) - L77-4 (SLDI)	Always	Below 1 Ω
F102-5 (MO+) or F103-2 (MI+) - Body ground	Always	10 kΩ or higher
F102-6 (MO-) or F103-3 (MI-) - Body ground	Always	10 kΩ or higher
F102-7 (SLDO) or F103-4 (SLDI) - Body ground	Always	10 kΩ or higher
F103-5 (MO+) or L77-2 (MI+) - Body ground	Always	10 kΩ or higher
F103-6 (MO-) or L77-3 (MI-)- Body ground	Always	10 kΩ or higher
F103-7 (SLDO) or L77-4 (SLDI) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

11.REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

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

NEXT

12.CLEAR DTC

Clear the DTCs (Click here).

NEXT

13.CHECK FOR DTC

Recheck for DTCs and check if the same DTC is output again (Click here).

REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY (Click here)

END (STEREO COMPONENT AMPLIFIER ASSEMBLY IS DEFECTIVE)

Result	Proceed to
Optional components (including associated wiring) are installed.	A
Optional components (including associated wiring) are not installed.	B

Tester Connection	Condition	Specified Condition
F74-1 (+B) - F74-3 (GND)	Always	11 to 14 V
F74-16 (+B2) - F74-3 (GND)	Always	11 to 14 V