Speaker Circuit
AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Speaker Circuit
- Speaker Circuit
DESCRIPTION
w/ Back Door Speaker:
* If there is a short in a 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 or speakers.
* If a short is detected in a speaker circuit, no sound can be heard from the speakers.
w/o Back Door Speaker:
* If there is a short in this circuit, the radio 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 receiver assembly or speakers.
* If a short is detected in a speaker circuit, no sound can be heard from the speakers.
WIRING DIAGRAM
1. w/ Back Door Speaker
2. w/o Back Door 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 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 rear 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 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:
(e) Measure the resistance between the stereo component speaker assembly and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(f) Measure the resistance between the stereo component amplifier assembly and body ground to check for a short circuit in the wire harness.
Standard Resistance:
(g) Measure the resistance between each of the front No. 1 speaker assemblies and body ground to check for a short circuit in the wire harness.
Standard Resistance:
(h) Measure the resistance between each of the rear 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. 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 -- Continue to next step.
6. INSPECT STEREO COMPONENT 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 STEREO COMPONENT 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 radio receiver assembly and speakers.
(b) Measure the resistance between each of the front No. 1 speaker assemblies and the radio receiver 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 radio receiver assembly 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 receiver assembly to check for an open circuit in the wire harness.
Standard Resistance:
(e) Measure the resistance between the radio 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. 1 speaker assemblies and body ground to check for a short circuit in the wire harness.
Standard Resistance:
(g) Measure the resistance between each of the rear 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.
8. 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.
9. 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.
10. 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)
11. 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