Audio Video. Dtc B15C3 Speaker Output Short

DTC Code	DTC Detection Condition	Trouble Area
B15C3	A short is detected in the speaker output circuit.	Radio and Display Receiver Assembly1 Stereo component amplifier assembly2 Speakers Harness or connector

*1: for 6 Speakers
*2: for 9 Speakers

WIRING DIAGRAM

Land Cruiser. Urj200, 202 Grj200 Vdj200.Audio Video.Audio And Visual System (For Radio Receiver Type).
Dtc
B15C3 Speaker Output Short

INSPECTION PROCEDURE

HINT:

After the inspection is completed, clear the DTCs.
When replacing the radio and display receiver assembly, it is necessary to perform the vehicle contract setting for Connected Services (w/ Connected Services Function).

1.CLEAR DTC

Clear the DTC (Click here).

NEXT

2.CHECK FOR DTC

Recheck for DTCs and check if the same DTC is output again (Click here).
OK:
DTC B15C3 is not output.

Go to step 3

USE SIMULATION METHOD TO CHECK (Click here)

3.CHECK VEHICLE CONDITION (SPEAKER TYPE)

Check the vehicle condition.
Result
Result
Proceed to
for 6 Speakers
A
for 9 Speakers
B

Go to step 8

A

4.CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)

*1: for RH Side
*2: for LH Side

Disconnect the F122 and F120 radio and display receiver assembly connectors.

Disconnect the F13*1 and/or F14*2 front No. 1 speaker assembly connector.

Disconnect the F7*1 and/or F8*2 front No. 2 speaker assembly connector.

Disconnect the J18*1 and/or J19*2 rear speaker set connector.

Standard Resistance:

RH Side
Tester Connection	Condition	Specified Condition
F120-1 (FR+) - F7-1 (+)	Always	Below 1 Ω
F120-5 (FR-) - F7-3 (-)	Always	Below 1 Ω
F7-2 (TWR+) - F13-1	Always	Below 1 Ω
F7-4 (TWR-) - F13-2	Always	Below 1 Ω
F122-1 (RR+) - J18-1	Always	Below 1 Ω
F122-3 (RR-) - J18-2	Always	Below 1 Ω
F120-1 (FR+) - Body ground	Always	10 kΩ or higher
F120-5 (FR-) - Body ground	Always	10 kΩ or higher
F7-2 (TWR+) - Body ground	Always	10 kΩ or higher
F7-4 (TWR-) - Body ground	Always	10 kΩ or higher
F122-1 (RR+) - Body ground	Always	10 kΩ or higher
F122-3 (RR-) - Body ground	Always	10 kΩ or higher

LH Side
Tester Connection	Condition	Specified Condition
F120-2 (FL+) - F8-1 (+)	Always	Below 1 Ω
F120-6 (FL-) - F8-3 (-)	Always	Below 1 Ω
F8-2 (TWL+) - F14-1	Always	Below 1 Ω
F8-4 (TWL-) - F14-2	Always	Below 1 Ω
F122-2 (RL+) - J19-1	Always	Below 1 Ω
F122-6 (RL-) - J19-2	Always	Below 1 Ω
F120-2 (FL+) - Body ground	Always	10 kΩ or higher
F120-6 (FL-) - Body ground	Always	10 kΩ or higher
F8-2 (TWL+) - Body ground	Always	10 kΩ or higher
F8-4 (TWL-) - Body ground	Always	10 kΩ or higher
F122-2 (RL+) - Body ground	Always	10 kΩ or higher
F122-6 (RL-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

Remove the front No. 1 speaker assembly (Click here).

Inspect the front No. 1 speaker assembly (Click here).

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY (Click here)

OK

6.CHECK FRONT NO. 2 SPEAKER ASSEMBLY

Replace the front No. 2 speaker with a known good one (Click here).

Check that the malfunction disappears.
HINT:
1. Connect all the connectors that were disconnected from the front No. 2 speaker assemblies.
2. When there is a possibility that either the right or left front speaker is defective, inspect by interchanging the right one with the left one.
3. Perform the above inspection on both LH and RH sides.
OK:
Malfunction disappears.

Go to step 7

END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

7.INSPECT REAR SPEAKER SET

Remove the rear speaker set (Click here).

Inspect the rear speaker set (Click here).

Result
Result	Proceed to
OK	A
NG	B

REPLACE REAR SPEAKER SET (Click here)

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY (Click here)

8.CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)

*1: for RH Side
*2: for LH Side

Disconnect the F74 stereo component amplifier assembly connector.

Disconnect the I1*1 and/or I10*2 front No. 1 speaker assembly connector.

Disconnect the F7*1 and/or F8*2 front No. 2 speaker assembly connector.

Disconnect the F13*1 and/or F14*2 front No. 3 speaker assembly connector.

Disconnect the F6 front No. 4 speaker assembly connector.

Disconnect the J18*1 and/or J19*2 rear speaker set connector.

Standard Resistance:

for Front No. 4 Speaker Assembly
Tester Connection	Condition	Specified Condition
F74-7 (CTR+) - F6-1	Always	Below 1 Ω
F74-22 (CTR-) - F6-2	Always	Below 1 Ω
F74-7 (CTR+) - Body ground	Always	10 kΩ or higher
F74-22 (CTR-) - Body ground	Always	10 kΩ or higher

RH Side
Tester Connection	Condition	Specified Condition
F74-5 (WFR+) - I1-1	Always	Below 1 Ω
F74-20 (WFR-) - I1-2	Always	Below 1 Ω
F74-13 (FR+) - F7-1 (+)	Always	Below 1 Ω
F74-28 (FR-) - F7-3 (-)	Always	Below 1 Ω
F7-2 (TWR+) - F13-1	Always	Below 1 Ω
F7-4 (TWR-) - F13-2	Always	Below 1 Ω
F74-15 (RR+) - J18-1	Always	Below 1 Ω
F74-30 (RR-) - J18-2	Always	Below 1 Ω
F74-5 (WFR+) - Body ground	Always	10 kΩ or higher
F74-20 (WFR-) - Body ground	Always	10 kΩ or higher
F74-13 (FR+) - Body ground	Always	10 kΩ or higher
F74-28 (FR-) - Body ground	Always	10 kΩ or higher
F7-2 (TWR+) - Body ground	Always	10 kΩ or higher
F7-4 (TWR-) - Body ground	Always	10 kΩ or higher
F74-15 (RR+) - Body ground	Always	10 kΩ or higher
F74-30 (RR-) - Body ground	Always	10 kΩ or higher

LH Side
Tester Connection	Condition	Specified Condition
F74-4 (WFL+) - I10-1	Always	Below 1 Ω
F74-19 (WFL-) - I10-2	Always	Below 1 Ω
F74-12 (FL+) - F8-1 (+)	Always	Below 1 Ω
F74-27 (FL-) - F8-3 (-)	Always	Below 1 Ω
F8-2 (TWL+) - F14-2	Always	Below 1 Ω
F8-4 (TWL-) - F14-1	Always	Below 1 Ω
F74-14 (RL+) - J19-1	Always	Below 1 Ω
F74-29 (RL-) - J19-2	Always	Below 1 Ω
F74-4 (WFL+) - Body ground	Always	10 kΩ or higher
F74-19 (WFL-) - Body ground	Always	10 kΩ or higher
F74-12 (FL+) - Body ground	Always	10 kΩ or higher
F74-27 (FL-) - Body ground	Always	10 kΩ or higher
F8-2 (TWL+) - Body ground	Always	10 kΩ or higher
F8-4 (TWL-) - Body ground	Always	10 kΩ or higher
F74-14 (RL+) - Body ground	Always	10 kΩ or higher
F74-29 (RL-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

9.INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

Remove the front No. 1 speaker assembly (Click here).

Inspect the front No. 1 speaker assembly (Click here).

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY (Click here)

OK

10.CHECK FRONT NO. 2 SPEAKER ASSEMBLY

Replace the front No. 2 speaker with a known good one (Click here).

Check that the malfunction disappears.
HINT:
1. Connect all the connectors that were disconnected from the front No. 2 speaker assemblies.
2. When there is a possibility that either the right or left front speaker is defective, inspect by interchanging the right one with the left one.
3. Perform the above inspection on both LH and RH sides.
OK:
Malfunction disappears.

Go to step 11

END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

11.CHECK FRONT NO. 4 SPEAKER ASSEMBLY

Replace the front No. 4 speaker with a known good one (Click here).

Check that the malfunction disappears.
HINT:
Connect all the connectors that were disconnected from the front No. 4 speaker assemblies.
OK:
Malfunction disappears.

Go to step 12

END (FRONT NO. 4 SPEAKER ASSEMBLY IS DEFECTIVE)

12.CHECK FRONT NO. 3 SPEAKER ASSEMBLY

Replace the front No. 3 speaker with a known good one (Click here).

Check that the malfunction disappears.
HINT:
1. Connect all the connectors that were disconnected from the front No. 3 speaker assemblies.
2. When there is a possibility that either the right or left front speaker is defective, inspect by interchanging the right one with the left one.
3. Perform the above inspection on both LH and RH sides.
OK:
Malfunction disappears.

Go to step 13

END (FRONT NO. 3 SPEAKER ASSEMBLY IS DEFECTIVE)

13.INSPECT REAR SPEAKER SET

Remove the rear speaker set (Click here).

Inspect the rear speaker set (Click here).

Result
Result	Proceed to
OK	A
NG	B

REPLACE REAR SPEAKER SET (Click here)

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY (Click here)