Speaker Circuit

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Speaker Circuit
- Speaker Circuit

DESCRIPTION

If there is a short in this speaker circuit, the stereo component amplifier assembly detects the short 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.

* *1: w/ Manual (SOS) Switch

WIRING DIAGRAM

1. w/o Rear Header Speaker









2. w/ Rear Header Speaker













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 stereo component amplifier assembly, DCM (telematics transceiver)*1 and speakers.

*1: w/ Manual (SOS) Switch

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

Standard Resistance:





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

Standard Resistance:





(d) w/o Manual (SOS) Switch

Measure the resistance between the front No. 2 speaker RH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:





(e) w/ Manual (SOS) Switch

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

Standard Resistance:





(f) w/ Manual (SOS) Switch

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

Standard Resistance:





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

Standard Resistance:





(h) Measure the resistance between each of the rear No. 2 speakers and the rear speakers to check for an open circuit in the wire harness.

Standard Resistance:





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

Standard Resistance:





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

Standard Resistance:





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

Standard Resistance:





(l) Measure the resistance between each of the front No. 1 speakers and body ground to check for a short circuit in the wire harness.

Standard Resistance:





(m) Measure the resistance between each of the rear speakers and body ground to check for a short circuit in the wire harness.

Standard Resistance:





(n) w/ Manual (SOS) Switch

Measure the resistance between front No. 2 speaker RH and body ground to check for a short circuit in the wire harness.

Standard Resistance:





(o) Proceed to the next step based on the inspection result.

Result:





B -- INSPECT FRONT NO. 1 SPEAKER

A -- REPAIR OR REPLACE HARNESS OR CONNECTOR

3. CHECK HARNESS AND CONNECTOR

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

*1: w/ Manual (SOS) Switch

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

Standard Resistance:





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

Standard Resistance:





(d) w/o Manual (SOS) Switch

Measure the resistance between the front No. 2 speaker RH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:





(e) w/ Manual (SOS) Switch

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

Standard Resistance:





(f) w/ Manual (SOS) Switch

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

Standard Resistance:





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

Standard Resistance:





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

Standard Resistance:





(i) Measure the resistance between each of the rear No. 2 speakers and the rear speakers to check for an open circuit in the wire harness.

Standard Resistance:





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

Standard Resistance:





(k) Measure the resistance between each of the rear header speakers and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:





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

Standard Resistance:





(m) Measure the resistance between each of the rear No. 2 speakers and body ground to check for a short circuit in the wire harness.

Standard Resistance:





(n) w/ Manual (SOS) Switch

Measure the resistance between front No. 2 speaker RH 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.

4. INSPECT FRONT NO. 1 SPEAKER

(a) Resistance check





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

Standard Resistance:

w/o Rear Header Speaker





w/ Rear Header Speaker





Text in Illustration





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

5. INSPECT FRONT NO. 2 SPEAKER

(a) Resistance check





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

Standard Resistance:

w/o Rear Header Speaker





w/ Rear Header Speaker





Text in Illustration





(b) Proceed to the next step based on the inspection result.

Result:





C -- REPLACE FRONT NO. 2 SPEAKER Removal

B -- INSPECT FRONT STEREO COMPONENT SPEAKER
A -- Continue to next step.

6. REPLACE FRONT NO. 2 SPEAKER

(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 speakers 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 FRONT STEREO COMPONENT SPEAKER

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

7. INSPECT FRONT STEREO COMPONENT SPEAKER

(a) Resistance check





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

Standard Resistance:

w/o Rear Header Speaker





w/ Rear Header Speaker





Text in Illustration





NG -- REPLACE FRONT STEREO COMPONENT SPEAKER Removal
OK -- Continue to next step.

8. INSPECT REAR SPEAKER

(a) Resistance check





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

Standard Resistance:

w/o Rear Header Speaker





w/ Rear Header Speaker





Text in Illustration





NG -- REPLACE REAR SPEAKER Removal
OK -- Continue to next step.

9. INSPECT REAR NO. 2 SPEAKER

(a) Resistance check





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

Standard Resistance:





Text in Illustration





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

10. REPLACE REAR NO. 2 SPEAKER

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

OK:

Malfunction disappears.

HINT
* Connect all the connectors to the rear No. 2 speakers that were disconnected.
* When 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.

NG -- INSPECT STEREO COMPONENT SPEAKER

OK -- END (REAR NO. 2 SPEAKER WAS DEFECTIVE)

11. INSPECT STEREO COMPONENT SPEAKER

(a) Resistance check





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

Standard Resistance:

w/o Rear Header Speaker





w/ Rear Header Speaker





Text in Illustration





(b) Proceed to the next step based on the inspection result.

Result:





D -- REPLACE STEREO COMPONENT SPEAKER Removal

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

B -- INSPECT DCM (TELEMATICS TRANSCEIVER)
A -- Continue to next step.

12. INSPECT REAR HEADER SPEAKER

(a) Resistance check





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

Standard Resistance:





Text in Illustration





(b) Proceed to the next step based on the inspection result.

Result:





C -- REPLACE REAR HEADER SPEAKER Removal

B -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table
A -- Continue to next step.

13. INSPECT DCM (TELEMATICS TRANSCEIVER)

(a) Resistance check





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

Standard Resistance:





Text in Illustration





NG -- REPLACE DCM (TELEMATICS TRANSCEIVER) Removal

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