Speaker Circuit

NAVIGATION: NAVIGATION SYSTEM: Speaker Circuit
- Speaker Circuit

DESCRIPTION

for 6 Speakers:

* If there is a short in this circuit, the navigation 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 navigation receiver assembly or speakers.

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

for 8 Speakers:

* The sound signals amplified by the stereo component amplifier are sent to the speakers from the stereo component amplifier through this circuit.

* If there is a short in this circuit, the stereo component amplifier 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 or speakers.

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

WIRING DIAGRAM

1. for 6 Speakers

2. for 8 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 navigation receiver assembly connector.

(b) Disconnect the navigation receiver assembly connector.

(d) Disconnect the front No. 2 speaker connectors.

(e) Disconnect the rear speaker connectors.

(f) Measure the resistance between each of the front No. 2 speakers and the navigation receiver assembly to check for an open circuit in the wire harness.

Standard Resistance:

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

Standard Resistance:

(h) Measure the resistance between each of the rear speakers and the navigation receiver assembly to check for an open circuit in the wire harness.

Standard Resistance:

(i) Measure the resistance between each speaker and body ground to check for a short circuit in the wire harness.

Standard Resistance:

Text in Illustration

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

3. INSPECT FRONT NO. 1 SPEAKER

(a) Resistance check

(1) Measure the resistance between the terminals of the speaker.

Standard Resistance:

NOTICE:
The speaker should not be removed to check resistance.

Text in Illustration

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

4. INSPECT FRONT NO. 2 SPEAKER

(a) Resistance check

(1) Measure the resistance between the terminals of the speaker.

Standard Resistance:

NOTICE:
The speaker should not be removed to check resistance.

(b) Check that the malfunction disappears when another speaker in good condition is installed.

Standard:

Malfunction disappears.

HINT
* Connect all the connectors to the front No. 2 speakers.
* 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.

Text in Illustration

NG -- INSPECT REAR SPEAKER

OK -- REPLACE FRONT NO. 2 SPEAKER Removal

5. INSPECT REAR SPEAKER

(a) Resistance check

(1) Measure the resistance between the terminals of the speaker.

Standard Resistance:

NOTICE:
The speaker should not be removed to check resistance.

Text in Illustration

NG -- REPLACE REAR SPEAKER Removal

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

6. CHECK HARNESS AND CONNECTOR

(a) Disconnect the stereo component amplifier connector.

(b) Disconnect the stereo component amplifier connector.

(d) Disconnect the front No. 2 speaker connectors.

(e) Disconnect the rear speaker connectors.

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

Standard Resistance:

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

Standard Resistance:

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

Standard Resistance:

(i) Measure the resistance between each speaker and body ground to check for a short circuit in the wire harness.

Standard Resistance:

Text in Illustration

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

7. INSPECT FRONT NO. 1 SPEAKER

(a) Resistance check

(1) Measure the resistance between the terminals of the speaker.

Standard Resistance:

NOTICE:
The speaker should not be removed to check resistance.

Text in Illustration

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

8. INSPECT FRONT NO. 2 SPEAKER

(a) Resistance check

(1) Measure the resistance between the terminals of the speaker.

Standard Resistance:

NOTICE:
The speaker should not be removed to check resistance.

Text in Illustration

NG -- INSPECT REAR SPEAKER

OK -- REPLACE FRONT NO. 2 SPEAKER Removal

9. INSPECT REAR SPEAKER

(a) Resistance check

(1) Measure the resistance between the terminals of the speaker.

Standard Resistance:

NOTICE:
The speaker should not be removed to check resistance.

Text in Illustration

NG -- REPLACE REAR SPEAKER Removal

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures