Speaker Circuit

AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Radio and Display Type without Intuitive Parking Assist System): Speaker Circuit
- Speaker Circuit

DESCRIPTION

for 6 Speakers:

* If there is a short in a speaker circuit, the radio and display receiver 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 radio and display receiver assembly or speakers.

* If a short is detected in a speaker circuit, no sound can be heard from the speakers.

for 10 Speakers:

* 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 or speakers.

* If a short is detected in a speaker circuit, no sound can be heard from the speakers.

WIRING DIAGRAM

1. for 6 Speakers

2. for 10 Speakers

INSPECTION PROCEDURE

PROCEDURE

1. CONFIRM MODEL

Result:

B -- CHECK HARNESS AND CONNECTOR
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR

(a) Disconnect the connectors from the radio and display receiver assembly and speakers.

(b) Measure the resistance between each of the front No. 2 speaker assemblies and the radio and display receiver assembly to check for an open circuit in the wire harness.

Standard Resistance:

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

Standard Resistance:

(d) Measure the resistance between each of the rear speaker assemblies and the radio and display receiver assembly to check for an open circuit in the wire harness.

Standard Resistance:

(e) 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:

(f) 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:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

(a) Resistance check

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

Standard Resistance:

Text in Illustration

NG -- REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Removal
OK -- Continue to next step.

4. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

(a) Resistance check

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

Standard Resistance:

Text in Illustration

NG -- REPLACE FRONT NO. 2 SPEAKER ASSEMBLY Removal
OK -- Continue to next step.

5. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

(a) Check that the malfunction disappears when a known good speaker is installed Removal.

OK:

Malfunction disappears.

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.

NG -- INSPECT REAR SPEAKER ASSEMBLY

OK -- END (FRONT NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE)

6. INSPECT REAR SPEAKER ASSEMBLY

(a) Resistance check

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

Standard Resistance:

Text in Illustration

NG -- REPLACE REAR SPEAKER ASSEMBLY Removal

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table

7. CHECK HARNESS AND CONNECTOR

(a) Disconnect the connectors from the stereo component amplifier assembly and speakers.

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

Standard Resistance:

(c) 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:

(d) Measure the resistance between the front No. 3 speaker assembly and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:

(e) 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:

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

Standard Resistance:

(g) Measure the resistance between the stereo component amplifier assembly and body ground to check for a short circuit in the wire harness.

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

8. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

(a) Resistance check