Toyota 4Runner Quiz
Audio / Visual / Telematics

Speaker Circuit

In this manual: Audio / Visual / Telematics
General — 25Audio / Visual / Telematics — 283Brake — 187Drivetrain — 204Power Source / Network — 79Steering — 76Suspension — 130Vehicle Exterior — 391Vehicle Interior — 693
~12min read
DESCRIPTION
  • If there is a short in a speaker circuit, the stereo component amplifier assembly detects it and stops output to the speakers.
  • Thus sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly, DCM (telematics transceiver)*1 or speakers.
  • If a short is detected in a speaker circuit, no sound can be heard from the speakers.
  • *1: w/ Manual (SOS) Switch
WIRING DIAGRAM

1. for 9 Speakers



2. for 8 Speakers


PROCEDURE

  1. CONFIRM MODEL

(a) Choose the model to be inspected.

Model

Proceed to

for 9 Speakers

A

for 8 Speakers

B

B

GO TO STEP 9
A

  1. CHECK HARNESS AND CONNECTOR (for 9 Speakers)

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

  • *1: w/ Manual (SOS) Switch

(b) w/ Manual (SOS) Switch

(1) Measure the resistance between the stereo component amplifier assembly and the DCM (telematics transceiver) to check for an open circuit in the wire harness.

Standard Resistance:

Tester Connection

Condition

Specified Condition

N12-10 (FR+) - F39-2 (SPI+)

Always

Below 1 Ω

N12-9 (FR-) - F39-3 (SPI-)

Always

Below 1 Ω

(2) Measure the resistance between the front No. 1 speaker assembly RH and the DCM (telematics transceiver) to check for an open circuit in the wire harness.

Standard Resistance:

Tester Connection

Condition

Specified Condition

H1-1 - F39-5 (SPO+)

Always

Below 1 Ω

H1-2 - F39-6 (SPO-)

Always

Below 1 Ω

(c) w/o Manual (SOS) Switch

(1) Measure the resistance between the front No. 1 speaker assembly RH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:

Tester Connection

Condition

Specified Condition

N12-10 (FR+) - H1-1

Always

Below 1 Ω

N12-9 (FR-) - H1-2

Always

Below 1 Ω

(d) Measure the resistance between the front No. 1 speaker assembly LH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:

Tester Connection

Condition

Specified Condition

N12-3 (FL+) - I1-1

Always

Below 1 Ω

N12-8 (FL-) - I1-2

Always

Below 1 Ω

(e) Measure the resistance between each of the front No. 2 speaker assemblies and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:

Tester Connection

Condition

Specified Condition

N12-2 (TWR+) - G22-4

Always

Below 1 Ω

N12-7 (TWR-) - G22-3

Always

Below 1 Ω

N12-1 (TWL+) - G15-4

Always

Below 1 Ω

N12-6 (TWL-) - G15-3

Always

Below 1 Ω

(f) Measure the resistance between the rear speaker assemblies and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:

Tester Connection

Condition

Specified Condition

N12-5 (RR+) - J1-1

Always

Below 1 Ω

N12-12 (RR-) - J1-2

Always

Below 1 Ω

N12-4 (RL+) - K1-1

Always

Below 1 Ω

N12-11 (RL-) - K1-2

Always

Below 1 Ω

(g) Measure the resistance between each of the rear No. 2 speaker assemblies and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:

Tester Connection

Condition

Specified Condition

N13-4 (R-R+) - W5-1

Always

Below 1 Ω

N13-10 (R-R-) - W5-2

Always

Below 1 Ω

N13-3 (R-L+) - W6-1

Always

Below 1 Ω

N13-9 (R-L-) - W6-2

Always

Below 1 Ω

(h) Measure the resistance between the No. 1 speaker with box assembly and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:

Tester Connection

Condition

Specified Condition

N13-1 (WF2+) - N15-2 (WF2+)

Always

Below 1 Ω

N13-5 (WF2-) - N15-4 (WF2-)

Always

Below 1 Ω

N13-2 (WF1+) - N15-1 (WF1+)

Always

Below 1 Ω

N13-6 (WF1-) - N15-3 (WF1-)

Always

Below 1 Ω

(i) 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

(j) 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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

  1. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY (for 9 Speakers)

(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

1.4 to 2.2 Ω

I1-1 - I1-2

Always

1.4 to 2.2 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

  1. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY (for 9 Speakers)

(a) Replace the front No. 2 speaker assembly with a known good one (See page ).


(b) Check that the malfunction disappears.

OK:

Malfunction disappears.

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

  1. REPLACE REAR SPEAKER ASSEMBLY (for 9 Speakers)

(a) Replace the rear speaker assembly with a known good one (See page ).


(b) Check that the malfunction disappears.

OK:

Malfunction disappears.

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

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

(a) Replace the rear No. 2 speaker assembly with a known good one (See page ).


(b) Check that the malfunction disappears.

OK:

Malfunction disappears.

HINT:

  • Connect all the connectors to the rear 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

  1. INSPECT NO. 1 SPEAKER WITH BOX ASSEMBLY (for 9 Speakers)

(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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

C

REPLACE NO. 1 SPEAKER WITH BOX ASSEMBLY
A

  1. 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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE DCM (TELEMATICS TRANSCEIVER)

  1. CHECK HARNESS AND CONNECTOR (for 8 Speakers)

(a) Disconnect the connectors from the G6 and G5 navigation receiver assembly and speakers.

(b) Measure the resistance between the navigation receiver assembly and the front No. 2 speaker assembles to check for an open circuit in the wire harness.

Standard Resistance:

Tester Connection

Condition

Specified Condition

G6-1 (FR+) - G10-1 (+)

Always

Below 1 Ω

G6-5 (FR-) - G10-3 (-)

Always

Below 1 Ω

G6-2 (FL+) - G1-1 (+)

Always

Below 1 Ω

G6-6 (FL-) - G1-3 (-)

Always

Below 1 Ω

(c) Measure the resistance between the front No. 1 speaker assembles and the front No. 2 speaker assembles to check for an open circuit in the wire harness.

Standard Resistance:

Tester Connection

Condition

Specified Condition

H1-1 - G10-2 (TWR+)

Always

Below 1 Ω

H1-2 - G10-4 (TWR-)

Always

Below 1 Ω

I1-1 - G1-2 (TWL+)

Always

Below 1 Ω

I1-2 - G1-4 (TWL-)

Always

Below 1 Ω

(d) Measure the resistance between the navigation receiver assembly, rear speaker assembly RH and rear No. 2 speaker assembly RH to check for an open circuit in the wire harness.

Standard Resistance:

Tester Connection

Condition

Specified Condition

G5-1 (RR+) - J1-1

Always

Below 1 Ω

G5-3 (RR-) - W5-2

Always

Below 1 Ω

W5-1 - J1-2

Always

Below 1 Ω

(e) Measure the resistance between the navigation receiver assembly, rear speaker assembly LH and rear No. 2 speaker assembly LH to check for an open circuit in the wire harness.

Standard Resistance:

Tester Connection

Condition

Specified Condition

G5-2 (RL+) - K1-1

Always

Below 1 Ω

G5-6 (RL-) - W6-2

Always

Below 1 Ω

W6-1 - K1-2

Always

Below 1 Ω

(f) 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

  1. INSPECT FRONT NO. 1 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

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

  1. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY (for 8 Speakers)

(a) Replace the front No. 2 speaker assembly with a known good one (See page ).


(b) Check that the malfunction disappears.

OK:

Malfunction disappears.

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

  1. 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

  1. 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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE REAR NO. 2 SPEAKER ASSEMBLY

Test yourself

A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.