Speaker Circuit
AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (w/ Navigation System): Speaker Circuit
- Speaker Circuit
DESCRIPTION
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, DCM (telematics transceiver)*1 or speakers.
* *1: w/ Manual (SOS) Switch
WIRING DIAGRAM
1. for 10 Speakers
2. for 13 Speakers
INSPECTION PROCEDURE
PROCEDURE
1. CONFIRM MODEL
(a) Choose the model to be inspected.
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 the front No. 1 speaker assembly RH 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. 1 speaker assembly 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 assembly 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 stereo component amplifier assembly and the DCM (telematics transceiver) 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 assembly 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 No. 2 speaker assembly LH and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(h) w/o Manual (SOS) Switch:
Measure the resistance between the front No. 3 speaker assembly RH and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(i) w/ Manual (SOS) Switch:
Measure the resistance between the front No. 3 speaker assembly RH and the DCM (telematics transceiver) to check for an open circuit in the wire harness.
Standard Resistance:
(j) Measure the resistance between the front No. 3 speaker assembly LH and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(k) Measure the resistance between the front No. 4 speaker assembly and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(l) Measure the resistance between the rear speaker assembly RH and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(m) Measure the resistance between the rear speaker assembly LH and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(n) Measure the resistance between the No. 1 speaker assembly with box and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(o) Measure the resistance between the stereo component amplifier assembly and body ground to check for a short circuit in the wire harness.
Standard Resistance:
(p) w/ Manual (SOS) Switch:
Measure the resistance between the DCM (telematics transceiver) and body ground to check for a short circuit in the wire harness.
Standard Resistance:
(q) Proceed to the next step based on the inspection result.
Result:
B -- INSPECT FRONT NO. 1 SPEAKER ASSEMBLY
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 the front No. 1 speaker assembly RH 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. 1 speaker assembly 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 assembly 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 stereo component amplifier assembly and the DCM (telematics transceiver) 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 assembly 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 No. 2 speaker assembly LH and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(h) w/o Manual (SOS) Switch:
Measure the resistance between the front No. 3 speaker assembly RH and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(i) w/ Manual (SOS) Switch:
Measure the resistance between the front No. 3 speaker assembly RH and the DCM (telematics transceiver) to check for an open circuit in the wire harness.
Standard Resistance:
(j) Measure the resistance between the front No. 3 speaker assembly LH and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(k) Measure the resistance between the front No. 4 speaker assembly and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(l) Measure the resistance between the rear No. 2 speaker assembly RH and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(m) Measure the resistance between the rear No. 2 speaker assembly LH and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(n) Measure the resistance between the No. 1 speaker assembly with box and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(o) Measure the resistance between the stereo component amplifier assembly and body ground to check for a short circuit in the wire harness.
Standard Resistance:
(p) w/ Manual (SOS) Switch:
Measure the resistance between the DCM (telematics transceiver) 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 ASSEMBLY
(a) Resistance check
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for 10 Speakers
for 13 Speakers
Text in Illustration
NG -- REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Removal
OK -- Continue to next step.
5. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY
(a) Resistance check
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for 10 Speakers
for 13 Speakers
Text in Illustration
NG -- REPLACE FRONT NO. 2 SPEAKER ASSEMBLY Removal
OK -- Continue to next step.
6. INSPECT FRONT NO. 3 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. 3 SPEAKER ASSEMBLY Removal
OK -- Continue to next step.
7. REPLACE FRONT NO. 3 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. 3 speaker assemblies that were disconnected.
* When there is a possibility that either the right or left 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 NO. 4 SPEAKER ASSEMBLY
OK -- END (FRONT NO. 3 SPEAKER ASSEMBLY WAS DEFECTIVE)
8. INSPECT FRONT NO. 4 SPEAKER ASSEMBLY
(a) Resistance check
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for 10 Speakers
for 13 Speakers
Text in Illustration
NG -- REPLACE FRONT NO. 4 SPEAKER ASSEMBLY Removal
OK -- Continue to next step.
9. CONFIRM MODEL
(a) Choose the model to be inspected.
Result:
B -- INSPECT REAR NO. 2 SPEAKER ASSEMBLY
A -- Continue to next step.
10. 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
(b) Proceed to the next step based on the inspection result.
Result:
B -- INSPECT NO. 1 SPEAKER ASSEMBLY WITH BOX
A -- REPLACE REAR SPEAKER ASSEMBLY Removal
11. INSPECT REAR 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 REAR NO. 2 SPEAKER ASSEMBLY Removal
OK -- Continue to next step.
12. INSPECT NO. 1 SPEAKER ASSEMBLY WITH BOX
(a) Resistance check
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for 10 Speakers
for 13 Speakers
Text in Illustration
(b) Proceed to the next step based on the inspection result.
Result:
B -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table
C -- REPLACE NO. 1 SPEAKER ASSEMBLY WITH BOX Removal
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