Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: 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
  • Stereo component amplifier assembly (w/ Stereo Component Amplifier)
  • Navigation receiver assembly (w/o Stereo Component Amplifier)

WIRING DIAGRAM

PROCEDURE

PROCEDURE

1.

CHECK VEHICLE CONDITION

(a) Check vehicle condition.

Result

Result

Proceed to

w/ Stereo Component Amplifier

A

w/o Stereo Component Amplifier

B

B

GO TO STEP 7

A

2.

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

(a) Disconnect the S24 and S31 stereo component amplifier assembly connectors.

(b) Disconnect the S15 and S16 front No. 1 speaker assembly connectors.

(c) Disconnect the S48 and S49 front No. 2 speaker assembly connectors.

(d) Disconnect the S17 and S18 rear speaker assembly connectors.

(e) Disconnect the S21 No. 1 speaker assembly with box connector.

(f) 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

S24-2 (FL+) - Body ground

Always

10 kΩ or higher

S24-1 (FL-) - Body ground

Always

10 kΩ or higher

S24-9 (FR+) - Body ground

Always

10 kΩ or higher

S24-3 (FR-) - Body ground

Always

10 kΩ or higher

S31-8 (TWL+) - Body ground

Always

10 kΩ or higher

S31-7 (TWL-) - Body ground

Always

10 kΩ or higher

S31-2 (TWR+) - Body ground

Always

10 kΩ or higher

S31-6 (TWR-) - Body ground

Always

10 kΩ or higher

S31-3 (RL+) - Body ground

Always

10 kΩ or higher

S31-9 (RL-) - Body ground

Always

10 kΩ or higher

S31-10 (RR+) - Body ground

Always

10 kΩ or higher

S31-4 (RR-) - Body ground

Always

10 kΩ or higher

S24-5 (WFL+) - Body ground

Always

10 kΩ or higher

S24-12 (WFL-) - Body ground

Always

10 kΩ or higher

S24-4 (WFR+) - Body ground

Always

10 kΩ or higher

S24-10 (WFR-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

(a) Remove 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 4.8Ω

Text in Illustration

*a

Component without harness connected

(Front No. 1 Speaker Assembly)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

(a) Remove 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

1 - 2

Always

1.5 to 2.5 Ω

Text in Illustration

*a

Component without harness connected

(Front No. 2 Speaker Assembly)

NG

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

OK

5.

INSPECT REAR SPEAKER ASSEMBLY

(a) Disconnect the S17 and S18 rear speaker assembly connectors.

(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)

NG

REPLACE REAR SPEAKER ASSEMBLY

OK

6.

INSPECT NO. 1 SPEAKER ASSEMBLY WITH BOX

(a) Disconnect the S21 No. 1 speaker assembly with box connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2 (WF+) - 4 (WF-)

Always

1.6 to 2.4 Ω

1 (WF+) - 3 (WF-)

Always

1.6 to 2.4 Ω

Text in Illustration

*a

Component without harness connected

(No. 1 Speaker Assembly with Box)

OK

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

NG

REPLACE NO. 1 SPEAKER ASSEMBLY WITH BOX

7.

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

(a) Disconnect the N23 and N24 navigation receiver assembly connectors.

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

(c) Disconnect the S17 and S18 rear speaker assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

N24-1 (FR+) - Body ground

Always

10 kΩ or higher

N24-5 (FR-) - Body ground

Always

10 kΩ or higher

N24-2 (FL+) - Body ground

Always

10 kΩ or higher

N24-6 (FL-) - Body ground

Always

10 kΩ or higher

N23-1 (RR+) - Body ground

Always

10 kΩ or higher

N23-3 (RR-) - Body ground

Always

10 kΩ or higher

N23-2 (RL+) - Body ground

Always

10 kΩ or higher

N23-6 (RL-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

8.

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

9.

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

(a) Remove 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)

NG

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

OK

10.

INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

(a) Remove 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)

NG

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

OK

11.

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. ).

(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.
OK

END

NG

12.

INSPECT REAR SPEAKER ASSEMBLY

(a) Remove 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)

OK

REPLACE NAVIGATION RECEIVER ASSEMBLY

NG

REPLACE REAR SPEAKER ASSEMBLY

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