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
  • Radio and display receiver assembly

WIRING DIAGRAM


PROCEDURE

1.

CHECK HARNESS AND CONNECTOR

(a) Disconnect the G47 and G48 radio and display receiver assembly connectors.

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

(c) Disconnect the G1 and G10 front No. 2 speaker assembly connectors.

(d) Disconnect the J1 and K1 rear speaker assembly connectors.

(e) Disconnect the W5 and W6 rear No. 2 speaker assembly connectors.

(f) 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

G47-1 (RR+) - Body ground

Always

10 kΩ or higher

G47-2 (RL+) - Body ground

Always

10 kΩ or higher

G47-3 (RR-) - Body ground

Always

10 kΩ or higher

G47-6 (RL-) - Body ground

Always

10 kΩ or higher

G48-1 (FR+) - Body ground

Always

10 kΩ or higher

G48-2 (FL+) - Body ground

Always

10 kΩ or higher

G48-5 (FR-) - Body ground

Always

10 kΩ or higher

G48-6 (FL-) - Body ground

Always

10 kΩ or higher

(g) 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

G1-2 (TWL+) - Body ground

Always

10 kΩ or higher

G1-4 (TWL-) - 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

(h) Measure the resistance between each of the rear speaker assemblies and rear No. 2 speaker assemblies to check for a short circuit in the wire harness.

Standard Resistance:

Tester Connection

Condition

Specified Condition

J1-2 - Body ground

Always

10 kΩ or higher

K1-2 - 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:

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 with a known good one (See page ).


(b) Clear the DTCs (See page ).


(c) Recheck for DTCs and check that no DTCs are output (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 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 (FRONT NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE)

NG

4.

INSPECT REAR SPEAKER ASSEMBLY

(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

5.

INSPECT REAR NO. 2 SPEAKER ASSEMBLY

(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 RADIO AND DISPLAY RECEIVER ASSEMBLY


NG

REPLACE REAR NO. 2 SPEAKER ASSEMBLY

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