Toyota Tacoma (2015-2018) Service Manual: Speaker Output Short (B15C3)

Toyota Tacoma (2015-2018) 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.	CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Result	Proceed to
for 6 Speakers	A
for 4 Speakers	B

GO TO STEP 8

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

(a) Disconnect the R30 and R29 radio and display receiver assembly connectors.

(b) Disconnect the S46 and S47 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
R30-1 (FR+) - Body ground	Always	10 kΩ or higher
R30-5 (FR-) - Body ground	Always	10 kΩ or higher
R30-2 (FL+) - Body ground	Always	10 kΩ or higher
R30-6 (FL-) - Body ground	Always	10 kΩ or higher
R29-1 (RR+) - Body ground	Always	10 kΩ or higher
R29-3 (RR-) - Body ground	Always	10 kΩ or higher
R29-2 (RL+) - Body ground	Always	10 kΩ or higher
R29-6 (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 S15 and S16 front No. 1 speaker assembly connectors.

(b) Disconnect the S46 and S47 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
S47-1 (+) - Body ground	Always	10 kΩ or higher
S47-3 (-) - Body ground	Always	10 kΩ or higher
S46-1 (+) - Body ground	Always	10 kΩ or higher
S46-3 (-) - 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:

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

Text in Illustration

*a	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 ). ).

(b) Clear the DTCs (See page (c) Recheck for DTCs and check that no DTCs are output. ).

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	4 Ω

Text in Illustration

*a	Component without harness connected (Rear Speaker Assembly)

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

REPLACE REAR SPEAKER ASSEMBLY

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

(a) Disconnect the R30 radio and display receiver assembly connector.

(b) Disconnect the S46 and S47 front No. 2 speaker assembly connectors.

(c) 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
R30-1 (FR+) - Body ground	Always	10 kΩ or higher
R30-5 (FR-) - Body ground	Always	10 kΩ or higher
R30-2 (FL+) - Body ground	Always	10 kΩ or higher
R30-6 (FL-) - 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 S15 and S16 front No. 1 speaker assembly connectors.

(b) Disconnect the S46 and S47 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
S46-1 (+) - Body ground	Always	10 kΩ or higher
S46-3 (-) - Body ground	Always	10 kΩ or higher
S47-1 (+) - Body ground	Always	10 kΩ or higher
S47-3 (-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.	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

11.	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
2 (+) - 4 (-)	Always	10 kΩ or higher
2 (+) - 1 (+)	Always	Below 1 Ω
4 (-) - 3 (-)	Always	Below 1 Ω

Text in Illustration

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

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

12.	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 ). ).

(b) Clear the DTCs (See page (c) Recheck for DTCs and check that no DTCs are output. ).

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

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

Short in GPS Antenna (B15C0,B15C1)

DESCRIPTION These DTCs are stored when a malfunction occurs in the navigation antenna assembly. DTC No. DTC Detection Condition Trouble Area B15C0 ...

A/C ECU Vehicle Information Reading/Writing Processor Malfunction (B15F5)

DESCRIPTION This DTC is stored when items controlled by the air conditioning amplifier assembly cannot be customized via the audio and visual system vehicle customization screen. HINT: The air co ...

Other materials:

Torque Converter Clutch Circuit Short to Battery or Open (P074015)
DESCRIPTION Shift solenoid valve SL is turned on and off by signals from the ECM to control the hydraulic pressure acting on the lock-up relay valve, which then controls operation of the lock-up clutch. DTC No. DTC Detection Condition Trouble Area SA ...

Removal
REMOVAL PROCEDURE 1. REMOVE REAR SEAT CUSHION ASSEMBLY (a) Remove the 2 bolts and rear seat cushion assembly. 2. REMOVE REAR SEATBACK HINGE COVER (a) for LH Side: (1) Disengage the 6 claws to remove the 2 rear seatback hinge cov ...

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by check ...