Dtc B15C3 Speaker Output Short

Audio Visual Telematics. Corolla. Zre142 Aze141
Navigation Multi Info Display. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

INSPECT REAR SPEAKER ASSEMBLY

DTC B15C3 Speaker Output Short


DESCRIPTION

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

DTC No.
DTC Detection Condition
Trouble Area
B15C3
A short is detected in the speaker output circuit.
  1. Harness or connector
  2. Speaker
  3. Radio and display receiver assembly

WIRING DIAGRAM


Corolla. Zre142 Aze141.Navigation Multi Info Display.Navigation System. Dtc B15C3 Speaker Output Short


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).
1.CHECK HARNESS AND CONNECTOR

  1. Disconnect the connectors from the radio and display receiver assembly and speakers.

  1. 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:
    Tester Connection
    		Condition
    		Specified Condition
    E126-1 (FR+) - Body ground
    		Always
    		10 kΩ or higher
    E126-5 (FR-) - Body ground
    		Always
    		10 kΩ or higher
    E126-2 (FL+) - Body ground
    		Always
    		10 kΩ or higher
    E126-6 (FL-) - Body ground
    		Always
    		10 kΩ or higher
    E127-1 (RR+) - Body ground
    		Always
    		10 kΩ or higher
    E127-3 (RR-) - Body ground
    		Always
    		10 kΩ or higher
    E127-2 (RL+) - Body ground
    		Always
    		10 kΩ or higher
    E127-6 (RL-) - Body ground
    		Always
    		10 kΩ or higher

  1. 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:
    Tester Connection
    		Condition
    		Specified Condition
    H4-3 (TWR+) - Body ground
    		Always
    		10 kΩ or higher
    H4-1 (TWR-) - Body ground
    		Always
    		10 kΩ or higher
    I4-3 (TWL+) - Body ground
    		Always
    		10 kΩ or higher
    I4-1 (TWL-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


  1. Resistance check



      Corolla. Zre142 Aze141.Navigation Multi Info Display.Navigation System. Dtc B15C3 Speaker Output Short

    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      H1-1 - H1-2
      		Always
      		3.2 to 4.8 Ω
      I1-1 - I1-2
      		Always
      		3.2 to 4.8 Ω
      Text in Illustration
      *A
      		for RH
      *B
      		for LH
      *a
      		Component without harness connected
      (Front No. 1 Speaker Assembly)


NG
REPLACE FRONT NO. 1 SPEAKER ASSEMBLY (COROLLA_ZRE142 RM000002XAP016X.html)
OK


3.INSPECT FRONT NO. 2 SPEAKER ASSEMBLY


  1. Resistance check



      Corolla. Zre142 Aze141.Navigation Multi Info Display.Navigation System. Dtc B15C3 Speaker Output Short

    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      H4-2 (-) - H4-4 (+)
      		Always
      		10 kΩ or higher
      H4-1 (TWR-) - H4-2 (-)
      		Always
      		Below 1 Ω
      H4-3 (TWR+) - H4-4 (+)
      		Always
      		Below 1 Ω
      I4-2 (-) - I4-4 (+)
      		Always
      		10 kΩ or higher
      I4-1 (TWL-) - I4-2 (-)
      		Always
      		Below 1 Ω
      I4-3 (TWL+) - I4-4 (+)
      		Always
      		Below 1 Ω
      Text in Illustration
      *A
      		for RH
      *B
      		for LH
      *a
      		Component without harness connected
      (Front No. 2 Speaker Assembly)


NG
REPLACE FRONT NO. 2 SPEAKER ASSEMBLY (COROLLA_ZRE142 RM000002XAP016X.html)
OK


4.REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

  1. Check that the malfunction disappears when a known good speaker is installed (COROLLA_ZRE142 RM000002XAP016X.html).

    OK:
    Malfunction disappears.
    HINT:
    1. Connect all the connectors to the front No. 2 speaker assemblies that were disconnected.
    2. 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.
    3. Perform the above inspection on both LH and RH sides.


NG
Go to step 5
OK

END (FRONT NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE)

5.INSPECT REAR SPEAKER ASSEMBLY


  1. Resistance check



      Corolla. Zre142 Aze141.Navigation Multi Info Display.Navigation System. Dtc B15C3 Speaker Output Short

    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      L1-1 - L1-2
      		Always
      		3.2 to 4.8 Ω
      L2-1 - L2-2
      		Always
      		3.2 to 4.8 Ω
      Text in Illustration
      *A
      		for RH
      *B
      		for LH
      *a
      		Component without harness connected
      (Rear Speaker Assembly)


NG
REPLACE REAR SPEAKER ASSEMBLY (COROLLA_ZRE142 RM000002XAY01CX.html)
OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY (COROLLA_ZRE142 RM000002XAJ01EX.html)