Toyota Venza: Speaker Output Short (B15C3)

Toyota Venza Service Manual / Audio / Video / Audio And Visual System / Speaker Output Short (B15C3)

DESCRIPTION

This DTC is stored when a malfunction occurs in the speakers.

DTC No.	DTC Detection Condition	Trouble Area
B15C3	A short is detected in the speaker output circuit	Harness or connector Speaker Radio and display receiver assembly

WIRING DIAGRAM

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - BODY GROUND)

(a) Disconnect the E4 and E5 radio and display receiver assembly connectors.

(b) Disconnect the E28 and E29 front No. 2 speaker assembly connectors.

(d) Measure the resistance between the radio and display receiver assembly and body ground to check for a short circuit in the wire harness.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E4-1 (FR+) - Body ground	Always	10 kΩ or higher
E4-5 (FR-) - Body ground	Always	10 kΩ or higher
E4-2 (FL+) - Body ground	Always	10 kΩ or higher
E4-6 (FL-) - Body ground	Always	10 kΩ or higher
E5-1 (RR+) - Body ground	Always	10 kΩ or higher
E5-3 (RR-) - Body ground	Always	10 kΩ or higher
E5-2 (RL+) - Body ground	Always	10 kΩ or higher
E5-6 (RL-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	CHECK HARNESS AND CONNECTOR (FRONT NO. 2 SPEAKER ASSEMBLY - BODY GROUND)

(a) Disconnect the H1 and I1 front No. 1 speaker assembly connectors.

(b) Disconnect the E28 and E29 front No. 2 speaker assembly connectors.

(c) Measure the resistance between each of the front No. 2 speaker assemblies and body ground to check for a short circuit in the wire harness.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E28-1 (+) - Body ground	Always	10 kΩ or higher
E28-3 (-) - Body ground	Always	10 kΩ or higher
E29-1 (+) - Body ground	Always	10 kΩ or higher
E29-3 (-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

(a) Remove the front No. 1 speaker assembly (See page ).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 - 2	Always	3.2 to 4.8 Ω

Text in Illustration

*a	Component without harness connected (Front No. 1 Speaker Assembly)

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

4.	INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

(a) Remove the front No. 2 speaker assembly (See page ).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
4 (TWR-) - 2(TWR+)	Always	10 kΩ or higher
3 (-) - 4(TWR-)	Always	Below 1 Ω
1 (+) - 2(TWR+)	Always	Below 1 Ω
4 (TWL-) - 2(TWL+)	Always	10 kΩ or higher
1 (+) - 4 (TWL-)	Always	Below 1 Ω
3 (-) - 2 (TWL+)	Always	Below 1 Ω

Text in Illustration

for RH

for LH

Component without harness connected

(Front No. 2 Speaker Assembly)

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

5.	REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

(a) Replace the front No. 2 speaker assembly with a new or known good one (See page ).

(b) Clear the DTCs (See page ).

OK:

No DTCs are output.

HINT:

Connect all the connectors to the front No. 2 speaker assemblies that were disconnected.
When there is a possibility that either the right or left front No. 2 speaker assembly is defective, inspect by interchanging the right one with the left one.
Perform the above inspection on both the LH and RH side.

END

6.	INSPECT REAR SPEAKER ASSEMBLY

(a) Remove the rear speaker assembly (See page ).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 - 2	Always	3.2 to 4.8 Ω

Text in Illustration

*a	Component without harness connected (Rear Speaker Assembly)

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

REPLACE REAR SPEAKER ASSEMBLY

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