Speaker Circuit

NAVIGATION: NAVIGATION SYSTEM: Speaker Circuit
- Speaker Circuit

DESCRIPTION

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 or speakers.

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

WIRING DIAGRAM









INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR

(a) Disconnect the connectors shown in the illustration from the stereo component amplifier and speakers.





(b) 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:





(c) 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:





(d) 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:





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

Standard resistance:





(f) Measure the resistance between each speaker 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.

2. 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.

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

3. INSPECT FRONT NO. 2 SPEAKER

(a) 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 speaker.
* 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.

NG -- INSPECT REAR SPEAKER

OK -- REPLACE FRONT NO. 2 SPEAKER Removal

4. 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.

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

5. INSPECT STEREO COMPONENT 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.

NG -- REPLACE STEREO COMPONENT SPEAKER Removal

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures