Toyota 4Runner manuals

Toyota 4Runner: 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
  • DCM (telematics transceiver)*1
  • Stereo component amplifier assembly*2
  • Navigation receiver assembly*3
  • *1: w/ Manual (SOS) Switch
  • *2: for 9 Speakers
  • *3: for 8 Speakers

WIRING DIAGRAM

1. for 9 Speakers



2. for 8 Speakers


PROCEDURE

1.

CHECK HARNESS AND CONNECTOR

(a) for 9 Speakers

(1) Disconnect the N12 and N13 stereo component amplifier assembly connectors, F39 DCM (telematics transceiver)*1 connector and speaker assembly connectors.

  • *1: w/ Manual (SOS) Switch

(2) 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

N12-10 (FR+) - Body ground

Always

10 kΩ or higher

N12-9 (FR-) - Body ground

Always

10 kΩ or higher

N12-3 (FL+) - Body ground

Always

10 kΩ or higher

N12-8 (FL-) - Body ground

Always

10 kΩ or higher

N12-2 (TWR+) - Body ground

Always

10 kΩ or higher

N12-7 (TWR-) - Body ground

Always

10 kΩ or higher

N12-1 (TWL+) - Body ground

Always

10 kΩ or higher

N12-6 (TWL-) - Body ground

Always

10 kΩ or higher

N12-4 (RL+) - Body ground

Always

10 kΩ or higher

N12-11 (RL-) - Body ground

Always

10 kΩ or higher

N12-5 (RR+) - Body ground

Always

10 kΩ or higher

N12-12 (RR-) - Body ground

Always

10 kΩ or higher

N13-3 (R-L+) - Body ground

Always

10 kΩ or higher

N13-9 (R-L-) - Body ground

Always

10 kΩ or higher

N13-4 (R-R+) - Body ground

Always

10 kΩ or higher

N13-10 (R-R-) - Body ground

Always

10 kΩ or higher

N13-1 (WF2+) - Body ground

Always

10 kΩ or higher

N13-5 (WF2-) - Body ground

Always

10 kΩ or higher

N13-2 (WF1+) - Body ground

Always

10 kΩ or higher

N13-6 (WF1-) - Body ground

Always

10 kΩ or higher

(3) w/ Manual (SOS) Switch

Measure the resistance between the DCM (telematics transceiver) and body ground to check for a short circuit in the wire harness.

Standard Resistance:

Tester Connection

Condition

Specified Condition

F39-5 (SPO+) - Body ground

Always

10 kΩ or higher

F39-6 (SPO-) - Body ground

Always

10 kΩ or higher

(b) for 8 speakers

(1) Disconnect the G5 and G6 navigation receiver assembly connectors and speaker assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G6-1 (FR+) - Body ground

Always

10 kΩ or higher

G6-5 (FR-) - Body ground

Always

10 kΩ or higher

G6-2 (FL+) - Body ground

Always

10 kΩ or higher

G6-6 (FL-) - Body ground

Always

10 kΩ or higher

G5-1 (RR+) - Body ground

Always

10 kΩ or higher

G5-3 (RR-) - Body ground

Always

10 kΩ or higher

G5-2 (RL+) - Body ground

Always

10 kΩ or higher

G5-6 (RL-) - Body ground

Always

10 kΩ or higher

G10-2 (TWR+) - Body ground

Always

10 kΩ or higher

G10-4 (TWR-) - Body ground

Always

10 kΩ or higher

G1-2 (TWL+) - Body ground

Always

10 kΩ or higher

G1-4 (TWR-) - Body ground

Always

10 kΩ or higher

W6-1 - Body ground

Always

10 kΩ or higher

W5-1 - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

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

Standard Resistance (for 9 Speakers):

Tester Connection

Condition

Specified Condition

H1-1 - H1-2

Always

1.4 to 2.2 Ω

I1-1 - I1-2

Always

1.4 to 2.2 Ω

Standard Resistance (for 8 Speakers):

Tester Connection

Condition

Specified Condition

H1-1 - H1-2

Always

4 Ω

I1-1 - I1-2

Always

4 Ω

Text in Illustration

*a

Component without harness connected

(Front No. 1 Speaker Assembly)

*b

for RH

*c

for LH



NG

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

OK

3.

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

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


(b) Clear the DTCs (See page ).


(c) Recheck for DTCs and check if the same DTC are output again (See page ).


Standard:

NO DTCs are output.

HINT:

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

OK

END

NG

4.

CONFIRM MODEL

(a) Choose the model to be inspected.

Model

Proceed to

for 9 Speakers

A

for 8 Speakers

B


B

GO TO STEP 7

A

5.

REPLACE REAR SPEAKER ASSEMBLY (for 9 Speakers)

(a) Replace the rear speaker assembly and check if the same DTC are output again.

(1) Replace the rear speaker assembly (See page ).


(2) Clear the DTCs (See page ).


(3) Recheck for DTCs and check if the same DTC are output again (See page ).


Standard:

NO DTCs are output.

HINT:

  • Connect all the connectors to the rear speaker assemblies.
  • If there is a possibility that either the right or left front speaker is defective, inspect by interchanging the right one with the left one.
  • Perform the above inspection on both LH and RH sides.

OK

END

NG

6.

REPLACE REAR NO. 2 SPEAKER ASSEMBLY (for 9 Speakers)

(a) Replace the rear No. 2 speaker assembly and check if the same DTC are output again.

(1) Replace the rear No. 2 speaker assembly (See page ).


(2) Clear the DTCs (See page ).


(3) Recheck for DTCs and check if the same DTC are output again (See page ).


Standard:

NO DTCs are output.

HINT:

  • Connect all the connectors to the rear No. 2 speaker assemblies.
  • If there is a possibility that either the right or left rear speaker is defective, inspect by interchanging the right one with the left one.
  • Perform the above inspection on both LH and RH sides.

OK

END


NG

GO TO STEP 9

7.

INSPECT REAR SPEAKER ASSEMBLY (for 8 Speakers)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J1-1 - J1-2

Always

4 Ω

K1-1 - K1-2

Always

4 Ω

Text in Illustration

*a

Component without harness connected

(Rear Speaker Assembly)

*b

for RH

*c

for LH



NG

REPLACE REAR SPEAKER ASSEMBLY

OK

8.

INSPECT REAR NO. 2 SPEAKER ASSEMBLY (for 8 Speakers)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

W5-1 - W5-2

Always

4 Ω

W6-1 - W6-2

Always

4 Ω

Text in Illustration

*a

Component without harness connected

(Rear No. 2 Speaker Assembly)

*b

for RH

*c

for LH



OK

REPLACE NAVIGATION RECEIVER ASSEMBLY


NG

REPLACE REAR NO.2 SPEAKER ASSEMBLY

9.

INSPECT NO. 1 SPEAKER WITH BOX ASSEMBLY

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

N15-1 (WF1+) - N15-3 (WF1-)

Always

1.6 to 2.4 Ω

N15-2 (WF2+) - N15-4 (WF2-)

Always

1.6 to 2.4 Ω

Text in Illustration

*a

Component without harness connected

(No. 1 Speaker with Box Assembly)


Condition

Proceed to

OK (w/ Manual (SOS) Switch)

A

OK (w/o Manual (SOS) Switch)

B

NG

C


B

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY


C

REPLACE NO. 1 SPEAKER WITH BOX ASSEMBLY

A

10.

INSPECT DCM (TELEMATICS TRANSCEIVER)

(a) Disconnect the F39 DCM (Telematics transceiver) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F39-2 (SPI+) - F39-5 (SPO+)

Always

Below 1 Ω

F39-3 (SPI-) - F39-6 (SPO-)

Always

Below 1 Ω

F39-2 (SPI+) - F39-3 (SPI-)

Always

10 kΩ or higher

F39-5 (SPO+) - F39-6 (SPO-)

Always

10 kΩ or higher

F39-2 (SPI+) - Body ground

Always

10 kΩ or higher

F39-3 (SPI-) - Body ground

Always

10 kΩ or higher

Text in Illustration

*a

Component without harness connected

(DCM (Telematics Transceiver))



OK

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY


NG

REPLACE DCM (TELEMATICS TRANSCEIVER)

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