Speaker Circuit

NAVIGATION: NAVIGATION SYSTEM: Speaker Circuit

Speaker Circuit

DESCRIPTION

The sound signal that has been amplified by the stereo component amplifier is 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.
When 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 on the left from the stereo component amplifier and speakers.
(b) Measure the resistance between the front No. 2 speakers and the stereo component amplifier to check for an open circuit in the wire harness.
Standard resistance:
Below 1 Ohms
(c) Measure the resistance between rear speakers and the stereo component amplifier to check for an open circuit in the wire harness.
Standard resistance:
Below 1 Ohms
(d) Measure the resistance between the front stereo component speaker and the stereo component amplifier to check for an open circuit in the wire harness.
Standard resistance:
Below 1 Ohms
(e) Measure the resistance between the woofer box speaker and the stereo component amplifier to check for an open circuit in the wire harness.
Standard resistance:
Below 1 Ohms
(f) Measure the resistance between the front No. 1 speaker and the front No. 2 speaker to check for an open circuit in the wire harness.
Standard resistance:
Below 1 Ohms
(g) Measure the resistance between each speaker and body ground to check for a short circuit in the wire harness.
Standard resistance:
10 kOhms or higher

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

2. INSPECT WOOFER BOX SPEAKER




(a) Resistance check.
(b) Measure the resistance according to the value(s) in the table below.

NOTE: The speaker should not be removed for checking.

Standard resistance:





NG -- REPLACE WOOFER BOX SPEAKER
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:
4 to 6 Ohms

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

4. INSPECT FRONT NO. 2 SPEAKER
(a) Check that the malfunction disappears when another speaker in good condition is installed.
OK:
Malfunction disappears.

HINT:
- Connect all the connectors to the front No. 2 speakers.
- When there is a possibility that either right or left front speaker is defective, inspect by interchanging the right one with the left one.

OK -- REPLACE FRONT NO. 2 SPEAKER

NG -- Continue to next step.

5. INSPECT REAR SPEAKER
(a) Resistance check.
(1) Measure the resistance between the terminals of the speaker.
Standard resistance:
Approximately 2.6 Ohms

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

6. INSPECT FRONT STEREO COMPONENT SPEAKER
(a) Resistance check.
(1) Measure the resistance between the terminals of the speaker.
Standard resistance:
1.2 to 2.2 Ohms

NG -- REPLACE FRONT STEREO COMPONENT SPEAKER
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE