B15C3

NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: B15C3; Speaker Output Short; 2013 MY Corolla [07/2012 -]
B15C3 - Speaker Output Short

DESCRIPTION

This DTC is stored when a malfunction occurs in the speakers.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
After replacing the radio and display receiver assembly of vehicles subscribed to pay-type satellite radio broadcasts, XM radio ID registration is necessary (w/ SDARS System).

PROCEDURE

1. CHECK HARNESS AND CONNECTOR

(a) Disconnect the connectors from the radio and display receiver assembly and speakers.

(b) Measure the resistance between the radio and display receiver assembly and body ground to check for a short circuit in the wire harness.

Standard Resistance:





(c) Measure the resistance between each of the front No. 2 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.

2. 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.

3. 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.

4. 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)

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 -- REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Removal