Speaker Circuit

NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: Speaker Circuit
- Speaker Circuit

DESCRIPTION

The sound signals amplified by the stereo component amplifier assembly are sent to the speakers from the stereo component amplifier assembly via the speaker circuit.

If there is a short in this circuit, the stereo component amplifier 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 stereo component amplifier assembly or speakers.

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

WIRING DIAGRAM

1. w/ "Bluetooth" Audio System

2. w/o "Bluetooth" Audio System

INSPECTION PROCEDURE

NOTICE:
If the DCM (telematics transceiver) has been replaced, perform the Activate DCM procedure using the Techstream DCM Activation.

PROCEDURE

1. CONFIRM MODEL

Result:

B -- CHECK HARNESS AND CONNECTOR
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR

(a) Disconnect the L32 stereo component amplifier assembly connector.

(b) Disconnect the L30 stereo component amplifier assembly connector.

(d) Disconnect the O1 and N1 front No. 1 speaker connectors.

(e) Disconnect the I5 and I4 front No. 2 speaker connectors.

(f) Disconnect the Q3 and P3 rear speaker connectors.

(g) Disconnect the Q5 and P5 rear No. 2 speaker connectors.

(h) Measure the resistance between each of the front No. 1 speakers and the stereo component amplifier assembly to check for an open or a short circuit in the wire harness.

Standard Resistance:

(i) w/o Manual (SOS) Switch:

Measure the resistance between each of the front No. 2 speakers and the stereo component amplifier assembly to check for an open or a short circuit in the wire harness.

Standard Resistance:

(j) w/ Manual (SOS) Switch:

Measure the resistance between the DCM (telematics transceiver) and the front No. 2 speaker RH to check for an open or a short circuit in the wire harness.

Standard Resistance:

(k) w/ Manual (SOS) Switch:

Measure the resistance between the DCM (telematics transceiver) and the stereo component amplifier assembly to check for an open or a short circuit in the wire harness.

Standard Resistance:

(l) w/ Manual (SOS) Switch:

Measure the resistance between the front No. 2 speaker LH and the stereo component amplifier assembly to check for an open or a short circuit in the wire harness.

Standard Resistance:

(m) Measure the resistance between each of the rear speakers and the stereo component amplifier assembly to check for an open or a short circuit in the wire harness.

Standard Resistance:

(n) Measure the resistance between each of the rear No. 2 speakers and the stereo component amplifier assembly to check for an open or a short circuit in the wire harness.

Standard Resistance:

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
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:

NOTICE:
The speaker should not be removed to check resistance.

Text in Illustration

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

4. INSPECT FRONT NO. 2 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.

Text in Illustration

NG -- REPLACE FRONT NO. 2 SPEAKER Removal
OK -- Continue to next step.

5. 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.

Text in Illustration

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

6. INSPECT REAR NO. 2 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.

Text in Illustration

NG -- REPLACE REAR NO. 2 SPEAKER Removal

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table

7. CHECK HARNESS AND CONNECTOR

(a) Disconnect the L34 navigation receiver assembly connector.

(b) Disconnect the L35 navigation receiver assembly connector.

(d) Disconnect the O1 and N1 front No. 1 speaker connectors.

(e) Disconnect the I5 and I4 front No. 2 speaker connectors.

(f) Disconnect the Q3 and P3 rear speaker connectors.

(g) Disconnect the Q5 and P5 rear No. 2 speaker connectors.

(h) Measure the resistance between each of the front No. 2 speakers and the navigation receiver assembly to check for an open or a short circuit in the wire harness.

Standard Resistance:

(i) Measure the resistance between the navigation receiver assembly and the stereo component amplifier assembly to check for an open or a short circuit in the wire harness.

Standard Resistance:

(j) Measure the resistance between each of the front No. 1 speakers and the stereo component amplifier assembly to check for an open or a short circuit in the wire harness.

Standard Resistance:

(k) Measure the resistance between each of the rear No. 2 speakers and the navigation receiver assembly to check for an open circuit in the wire harness.

Standard Resistance:

(l) Measure the resistance between each of the rear No. 2 speakers and the rear speakers to check for an open circuit in the wire harness.

Standard Resistance:

Text in Illustration

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

8. 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.

Text in Illustration

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

9. INSPECT FRONT NO. 2 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.

Text in Illustration

NG -- REPLACE FRONT NO. 2 SPEAKER Removal
OK -- Continue to next step.

10. 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.

Text in Illustration

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

11. INSPECT REAR 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 rear No. 2 speakers that were disconnected.
* If there is a possibility that either the right or left rear No. 2 speaker is defective, inspect by interchanging the right one with the left one.
* Perform the above inspection on both LH and RH sides.

NG -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table

OK -- REPLACE REAR NO. 2 SPEAKER Removal