Dtc B15C3 Speaker Output Short


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

CHECK FOR DTC

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER - FRONT NO. 2 SPEAKER)

CHECK HARNESS AND CONNECTOR (FRONT NO. 2 SPEAKER - FRONT NO. 1 SPEAKER)

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER - REAR SPEAKER)

INSPECT REAR SPEAKER ASSEMBLY

DTC B15C3 Speaker Output Short


DESCRIPTION

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

DTC Code
DTC Detection Condition
Trouble Area
B15C3
A short is detected in the speaker output circuit.
  1. Speakers
  2. Radio and display receiver assembly
  3. Harness or connector

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Audio Visual.Audio And Visual System (For Radio And Display Type). Dtc B15C3 Speaker Output Short


INSPECTION PROCEDURE

1.CHECK FOR DTC

  1. Disconnect the R25 and R26 radio and display receiver assembly connectors.

  1. Clear the DTC (Toyota Fortuner RM0000011BU0FAX.html).

  1. Check if DTC B15C3 is output.

    OK:
    DTC B15C3 is not output.


NG
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY (Toyota Fortuner RM000003OQ9003X.html)
OK


2.CHECK FOR DTC

  1. Reconnect the R26 radio and display receiver assembly connector.

  1. Clear the DTC (Toyota Fortuner RM0000011BU0FAX.html).

  1. Check if DTC B15C3 is output.

    OK:
    DTC B15C3 is not output.


NG
Go to step 7
OK


3.CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER - FRONT NO. 2 SPEAKER)

  1. Disconnect the R25 radio and display receiver assembly connector.

  1. Disconnect the T25*1 and/or T24*2 speaker connector.

    1. *1: for RH
    2. *2: for LH

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

    Standard Resistance:
    for RH
    Tester Connection
    		Condition
    		Specified Condition
    R25-1 (FR+) - T25-4
    		Always
    		Below 1 Ω
    R25-5 (FR-) - T25-2
    R25-1 (FR+) - Body ground
    		Always
    		10 kΩ or higher
    R25-5 (FR-) - Body ground
    for LH
    Tester Connection
    		Condition
    		Specified Condition
    R25-2 (FL+) - T24-4
    		Always
    		Below 1 Ω
    R25-6 (FL-) - T24-2
    R25-2 (FL+) - Body ground
    		Always
    		10 kΩ or higher
    R25-6 (FL-) - Body ground


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (FRONT NO. 2 SPEAKER - FRONT NO. 1 SPEAKER)
  1. *1: for RH
  2. *2: for LH

  1. Disconnect the T25*1 and/or T24*2 speaker connector.

  1. Disconnect the S16*1 and/or S15*2 speaker connector.

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

    Standard Resistance:
    for RH
    Tester Connection
    		Condition
    		Specified Condition
    T25-3 - S16-1
    		Always
    		Below 1 Ω
    T25-1 - S16-2
    T25-3 - Body ground
    		Always
    		10 kΩ or higher
    T25-1 - Body ground
    for LH
    Tester Connection
    		Condition
    		Specified Condition
    T24-3 - S15-1
    		Always
    		Below 1 Ω
    T24-1 - S15-2
    T24-3 - Body ground
    		Always
    		10 kΩ or higher
    T24-1 - Body ground


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50

  1. Disconnect the S16*1 and/or S15*2 speaker connector.

    1. *1: for RH
    2. *2: for LH

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		Always
    		4 Ω


NG
REPLACE FRONT NO. 1 SPEAKER ASSEMBLY (Toyota Fortuner RM0000014T702CX.html)
OK


6.INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

  1. Temporarily replace the speaker with a new or normally functioning one (Toyota Fortuner RM0000014T702CX.html).

  1. Check that the malfunction disappears.

    HINT:
    1. Connect all the speaker connectors to the speakers.
    2. When there is a possibility that either the right or left speaker is defective, inspect by interchanging the right one with the left one.
    Result
    Result
    		Proceed to
    Malfunction disappears
    		A
    Malfunction does not disappear
    		B


B
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY (Toyota Fortuner RM000003OQ9003X.html)
A

END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

7.CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER - REAR SPEAKER)

  1. Disconnect the R26 radio and display receiver assembly connector.

  1. Disconnect the S18*1 and/or S17*2 speaker connector.

    1. *1: for RH
    2. *2: for LH

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

    Standard Resistance:
    for RH
    Tester Connection
    		Condition
    		Specified Condition
    R26-1 (RR+) - S18-1
    		Always
    		Below 1 Ω
    R26-3 (RR-) - S18-2
    R26-1 (RR+) - Body ground
    		Always
    		10 kΩ or higher
    R26-3 (RR-) - Body ground
    for LH
    Tester Connection
    		Condition
    		Specified Condition
    R26-2 (RL+) - S17-1
    		Always
    		Below 1 Ω
    R26-6 (RL-) - S17-2
    R26-2 (RL+) - Body ground
    		Always
    		10 kΩ or higher
    R26-6 (RL-) - Body ground


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


8.INSPECT REAR SPEAKER ASSEMBLY


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50

  1. Disconnect the S18*1 and/or S17*2 speaker connector.

    1. *1: for RH
    2. *2: for LH

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		Always
    		4 Ω


NG
REPLACE REAR SPEAKER ASSEMBLY (Toyota Fortuner RM0000014TB01MX.html)
OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY (Toyota Fortuner RM000003OQ9003X.html)