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 or speakers.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. CHECK HARNESS AND CONNECTOR
(a) Disconnect the connectors shown in the illustration from the stereo component amplifier assembly, DCM (telematics transceiver)*1 and speakers.
*1: w/ Manual (SOS) Switch
(b) Measure the resistance between each of the front No. 1 speakers 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. 2 speaker 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 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 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. 4 speaker and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(h) for 9 Speakers:
Measure the resistance between each of the rear No. 1 speakers and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(i) for 12 or 15 Speakers:
Measure the resistance between each of the rear No. 2 speakers and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(j) for 12 or 15 Speakers:
Measure the resistance between the rear No. 3 speaker and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
*1: for 12 Speakers
(k) Measure the resistance between each of the front No. 2 speakers and the front No. 3 speakers to check for an open circuit in the wire harness.
Standard Resistance:
(l) for 12 or 15 Speakers
Measure the resistance between each of the rear No. 2 speakers and the rear No. 1 speakers to check for an open circuit in the wire harness.
Standard Resistance:
(m) for 15 Speakers:
Measure the resistance between each of the quarter side speakers and the stereo component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:
(n) Measure the resistance between the stereo component amplifier assembly and body ground to check for a short circuit in the wire harness.
Standard Resistance:
*1: for 15 Speakers
*2: for 12 Speakers
*3: for 12 or 15 Speakers
(o) Measure the resistance between each of the front No. 2 speakers 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 front No. 2 speaker RH and body ground to check for a short circuit in the wire harness.
Standard Resistance:
(q) for 12 or 15 Speakers
Measure the resistance between each of the rear No. 2 speakers 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 according to the value(s) in the table below.
Standard Resistance:
for 9 or 12 Speakers
for 15 Speakers
Text in Illustration
NG -- REPLACE FRONT NO. 1 SPEAKER Removal
OK -- Continue to next step.
3. INSPECT FRONT NO. 2 SPEAKER
(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 Removal
OK -- Continue to next step.
4. REPLACE FRONT NO. 2 SPEAKER
(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 speakers 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 FRONT NO. 3 SPEAKER
OK -- END (FRONT NO. 2 SPEAKER WAS DEFECTIVE)
5. INSPECT FRONT NO. 3 SPEAKER
(a) Resistance check
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for 9 or 12 Speakers
for 15 Speakers
Text in Illustration
NG -- REPLACE FRONT NO. 3 SPEAKER Removal
OK -- Continue to next step.
6. INSPECT FRONT NO. 4 SPEAKER
(a) Resistance check
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for 9 or 12 Speakers
for 15 Speakers
Text in Illustration
NG -- REPLACE FRONT NO. 4 SPEAKER Removal
OK -- Continue to next step.
7. INSPECT REAR NO. 1 SPEAKER
(a) Resistance check
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for 9 or 12 Speakers
for 15 Speakers
Text in Illustration
(b) Proceed to the next step based on the inspection result.
Result:
B -- INSPECT DCM (TELEMATICS TRANSCEIVER)
C -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table
D -- REPLACE REAR NO. 1 SPEAKER Removal
A -- Continue to next step.
8. INSPECT REAR NO. 2 SPEAKER
(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 Removal
OK -- Continue to next step.
9. REPLACE REAR NO. 2 SPEAKER
(a) Check that the malfunction disappears when a known good speaker is installed Removal.
OK:
Malfunction disappears.
HINT
* Connect all the connectors to the rear No. 2 speakers that were disconnected.
* When there is a possibility that either the right or left rear 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 NO. 3 SPEAKER
OK -- END (REAR NO. 2 SPEAKER WAS DEFECTIVE)
10. INSPECT REAR NO. 3 SPEAKER
(a) Resistance check
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for 12 Speakers
for 15 Speakers
Text in Illustration
(b) Proceed to the next step based on the inspection result.
Result:
B -- INSPECT DCM (TELEMATICS TRANSCEIVER)
C -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table
D -- REPLACE REAR NO. 3 SPEAKER Removal
A -- Continue to next step.
11. INSPECT QUARTER SIDE SPEAKER
(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 -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table
C -- REPLACE QUARTER SIDE SPEAKER Removal
A -- Continue to next step.
12. 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