Toyota Venza: Speaker Output Short (B15C3)

Toyota Venza Service Manual / Navigation / Multi Info Display / Navigation 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 Navigation receiver assembly1 Stereo component amplifier assembly2

*1: for 6 Speakers
*2: for 13 Speakers

WIRING DIAGRAM

1. for 6 Speakers

2. for 13 Speakers

PROCEDURE

1.	CONFIRM MODEL

(a) Choose the model to be inspected.

Result	Proceed to
for 6 Speakers	A
for 13 Speakers	B

GO TO STEP 8

2.	CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - BODY GROUND)

(a) Disconnect the E38 and E39 navigation receiver assembly connectors.

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

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
E38-1 (FR+) - Body ground	Always	10 kΩ or higher
E38-5 (FR-) - Body ground	Always	10 kΩ or higher
E38-2 (FL+) - Body ground	Always	10 kΩ or higher
E38-6 (FL-) - Body ground	Always	10 kΩ or higher
E39-1 (RR+) - Body ground	Always	10 kΩ or higher
E39-3 (RR-) - Body ground	Always	10 kΩ or higher
E39-2 (RL+) - Body ground	Always	10 kΩ or higher
E39-6 (RL-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

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

(b) Disconnect the H1 and I1 front No. 1 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
E28-3 (-) - Body ground	Always	10 kΩ or higher
E28-1 (+) - Body ground	Always	10 kΩ or higher
E29-3 (-) - Body ground	Always	10 kΩ or higher
E29-1 (+) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	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

5.	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:

for RH:

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

for LH:

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

6.	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

7.	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 NAVIGATION RECEIVER ASSEMBLY

REPLACE REAR SPEAKER ASSEMBLY

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

(a) Disconnect the E12 and E15 stereo component amplifier assembly connectors.

(b) Disconnect the E25 and E26 front No. 2 speaker assembly connectors.

(d) Disconnect the E27 front No. 4 speaker assembly connector.

(e) Disconnect the J4 and K4 rear speaker assembly connectors.

(f) Disconnect the J5 and K5 rear No. 2 speaker assembly connectors.

(g) Disconnect the M29 and L33 rear No. 3 speaker assembly connectors.

(h) Measure the resistance between the stereo component amplifier assembly and body ground to check for a short circuit in the wire harness.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E15-10 (FR+) - Body ground	Always	10 kΩ or higher
E15-9 (FR-) - Body ground	Always	10 kΩ or higher
E15-3 (FL+) - Body ground	Always	10 kΩ or higher
E15-8 (FL-) - Body ground	Always	10 kΩ or higher
E12-2 (WFR+) - Body ground	Always	10 kΩ or higher
E12-6 (WFR-) - Body ground	Always	10 kΩ or higher
E12-1 (WFL+) - Body ground	Always	10 kΩ or higher
E12-5 (WFL-) - Body ground	Always	10 kΩ or higher
E12-3 (CTR+) - Body ground	Always	10 kΩ or higher
E12-9 (CTR-) - Body ground	Always	10 kΩ or higher
E12-8 (RR+) - Body ground	Always	10 kΩ or higher
E12-7 (RR-) - Body ground	Always	10 kΩ or higher
E15-4 (RL+) - Body ground	Always	10 kΩ or higher
E15-11 (RL-) - Body ground	Always	10 kΩ or higher
E12-4 (WF2+) - Body ground	Always	10 kΩ or higher
E12-10 (WF2-) - Body ground	Always	10 kΩ or higher
E15-5 (WF1+) - Body ground	Always	10 kΩ or higher
E15-12 (WF1-) - Body ground	Always	10 kΩ or higher
E15-2 (SR+) - Body ground	Always	10 kΩ or higher
E15-7 (SR-) - Body ground	Always	10 kΩ or higher
E15-1 (SL+) - Body ground	Always	10 kΩ or higher
E15-6 (SL-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

(a) Disconnect the E23 and E24 front No. 3 speaker assembly connectors.

(b) Disconnect the E25 and E26 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
E25-3 (+) - Body ground	Always	10 kΩ or higher
E25-4 (-) - Body ground	Always	10 kΩ or higher
E26-3 (+) - Body ground	Always	10 kΩ or higher
E26-4 (-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.	INSPECT FRONT NO. 3 SPEAKER ASSEMBLY

(a) Remove the front No. 3 speaker assembly (See page ).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
2 - 3	Always	10 kΩ or higher

Text in Illustration

*a	Component without harness connected (Front No. 3 Speaker Assembly)

REPLACE FRONT NO. 3 SPEAKER ASSEMBLY

11.	REPLACE FRONT NO. 3 SPEAKER ASSEMBLY

(a) Replace the front No. 3 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. 3 speaker assemblies that were disconnected.
When there is a possibility that either the right or left front No. 3 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

12.	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:

for RH:

Tester Connection	Condition	Specified Condition
1 (TWR+) - 2 (TWR-)	Always	1.5 to 2.5 Ω
1 (TWR+) - 3 (+)	Always	Below 1 Ω
2 (TWR-) - 4 (-)	Always	Below 1 Ω

for LH:

Tester Connection	Condition	Specified Condition
1 (TWL+) - 2 (TWL-)	Always	1.5 to 2.5 Ω
1 (TWL+) - 3 (+)	Always	Below 1 Ω
2 (TWL-) - 4 (-)	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

13.	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	1.65 to 2.15 Ω

Text in Illustration

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

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

14.	INSPECT FRONT NO. 4 SPEAKER ASSEMBLY

(a) Remove the front No. 4 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	1.5 to 2.5 Ω

Text in Illustration

*a	Component without harness connected (Front No. 4 Speaker Assembly)

REPLACE FRONT NO. 4 SPEAKER ASSEMBLY

15.	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	1.5 to 2.2 Ω

Text in Illustration

*a	Component without harness connected (Rear Speaker Assembly)

REPLACE REAR SPEAKER ASSEMBLY

16.	INSPECT REAR NO. 2 SPEAKER ASSEMBLY

(a) Remove the rear 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
1 - 2	Always	1.5 to 2.5 Ω

Text in Illustration

*a	Component without harness connected (Rear No. 2 Speaker Assembly)

REPLACE REAR NO. 2 SPEAKER ASSEMBLY

17.	INSPECT REAR NO. 3 SPEAKER ASSEMBLY

(a) Remove the rear No. 3 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	1.5 to 2.5 Ω

Text in Illustration

*a	Component without harness connected (Rear No. 3 Speaker Assembly)

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

REPLACE REAR NO. 3 SPEAKER ASSEMBLY

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