Speaker Circuit

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

DESCRIPTION

When the vehicle has a built-in type amplifier, a sound signal is sent from the navigation receiver assembly to the speakers via this circuit.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR

(a) Disconnect the connectors shown in the illustration from the navigation receiver assembly and speakers.





(b) Measure the resistance between each of the front No. 2 speakers and the navigation 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 speakers and each of the front No. 1 speakers to check for an open circuit in the wire harness.

Standard Resistance:





(d) Measure the resistance between each of the rear speakers and the navigation receiver assembly to check for an open circuit in the wire harness.

Standard Resistance:





(e) Measure the resistance between each speaker 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 between the terminals of the speaker.

Standard Resistance:





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

3. INSPECT FRONT 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 front No. 2 speaker.
* 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 -- REPLACE FRONT NO. 2 SPEAKER Removal
OK -- Continue to next step.

4. INSPECT REAR SPEAKER

(a) Resistance check

(1) Measure the resistance between the terminals of the speaker.

Standard Resistance:





NG -- REPLACE REAR SPEAKER Removal

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures