AUDIO AND VISUAL SYSTEM(for Radio and Display Type), Diagnostic DTC:B15C3

DTC Code	DTC Name
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.	Harness or connector Speaker Stereo component amplifier assembly* Radio and display receiver assembly

*: for 10 Speakers

WIRING DIAGRAM

for 6 Speakers
for 11 Speakers

PROCEDURE

CONFIRM MODEL

Result
Result	Proceed to
for 6 Speakers	A
for 11 Speakers	B

CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT) Click here

CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)

*1: for RH Side
*2: for LH Side

Disconnect the D125 and/or D126 radio and display receiver assembly connectors.
Disconnect the E1*1 and/or E11*2 front No. 1 speaker assembly connectors.
Disconnect the D39*1 and/or D40*2 front No. 2 speaker assembly connectors.
Disconnect the F2*1 and/or F7*2 rear No. 1 speaker assembly connectors.

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

Standard Resistance

for LH Side
Tester Connection	Condition	Specified Condition
D125-2 (FL+) - D40-4 (+)	Always	Below 1 Ω
D125-6 (FL-) - D40-2 (-)	Always	Below 1 Ω
D40-3 (TWL+) - E11-1	Always	Below 1 Ω
D40-1 (TWL-) - E11-2	Always	Below 1 Ω
D126-2 (RL+) - F7-1	Always	Below 1 Ω
D126-6 (RL-) - F7-2	Always	Below 1 Ω
E11-1 - Body ground	Always	10 kΩ or higher
E11-2 - Body ground	Always	10 kΩ or higher
D40-4 (+) - Body ground	Always	10 kΩ or higher
D40-2 (-) - Body ground	Always	10 kΩ or higher
F7-1 - Body ground	Always	10 kΩ or higher
F7-2 - Body ground	Always	10 kΩ or higher

for RH Side
Tester Connection	Condition	Specified Condition
D125-1 (FR+) - D39-4 (+)	Always	Below 1 Ω
D125-5 (FR-) - D39-2 (-)	Always	Below 1 Ω
D39-3 (TWR+) - E1-1	Always	Below 1 Ω
D39-1 (TWR-) - E1-2	Always	Below 1 Ω
D126-1 (RR+) - F2-1	Always	Below 1 Ω
D126-3 (RR-) - F2-2	Always	Below 1 Ω
E1-1 - Body ground	Always	10 kΩ or higher
E1-2 - Body ground	Always	10 kΩ or higher
D39-4 (+) - Body ground	Always	10 kΩ or higher
D39-2 (-) - Body ground	Always	10 kΩ or higher
F2-1 - Body ground	Always	10 kΩ or higher
F2-2 - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY
1. Remove the front No. 1 speaker assembly Click here.
2. Inspect the front No. 1 speaker assembly Click here.
NG
REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

OK
INSPECT REAR NO. 1 SPEAKER ASSEMBLY
1. Remove the rear No. 1 speaker assembly Click here.
2. Inspect the rear No. 1 speaker assembly Click here.
NG
REPLACE REAR NO. 1 SPEAKER ASSEMBLY Click here

OK
CHECK FRONT NO. 2 SPEAKER ASSEMBLY
1. Temporarily replace the front No. 2 speaker assembly with a known good one Click here.
2. Clear the DTCs Click here.
3. Check for DTCs Click here.
  
  OK
  
  No DTCs are output.
  Tech Tips
  - 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.
OK
END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

NG
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

OK
No DTCs are output.

CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)

*1: for RH Side

*2: for LH Side

Disconnect the D125 and D126 radio and display receiver assembly connectors.
Disconnect the H20 stereo component amplifier assembly connector.
Disconnect the E1*1 and/or E11*2 front No. 1 speaker assembly connectors.
Disconnect the D52*1 and/or D53*2 front No. 2 speaker assembly connectors.
Disconnect the F11*1 and/or F12*2 rear No. 1 speaker assembly connectors.
Disconnect the F3*1 and/or F8*2 rear No. 2 speaker assembly connectors.

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

Standard Resistance

for LH Side
Tester Connection	Condition	Specified Condition
H20-4 (WFL+) - E11-1	Always	Below 1 Ω
H20-11 (WFL-) - E11-2	Always	Below 1 Ω
D125-2 (FL+) - D53-1 (+)	Always	Below 1 Ω
D125-6 (FL-) - D53-3 (-)	Always	Below 1 Ω
H20-1 (RL+) - D53-2 (TWL+)	Always	Below 1 Ω
H20-6 (RL-) - D53-4 (TWL-)	Always	Below 1 Ω
D126-2 (RL+) - F8-4 (+)	Always	Below 1 Ω
D126-6 (RL-) - F8-2 (-)	Always	Below 1 Ω
F12-1 - F8-3 (+TW)	Always	Below 1 Ω
F12-2 - F8-1 (-TW)	Always	Below 1 Ω
E11-1 - Body ground	Always	10 kΩ or higher
E11-2 - Body ground	Always	10 kΩ or higher
D53-2 (TWL+) - Body ground	Always	10 kΩ or higher
D53-4 (TWL-) - Body ground	Always	10 kΩ or higher
D53-1 (+) - Body ground	Always	10 kΩ or higher
D53-3 (-) - Body ground	Always	10 kΩ or higher
F8-2 (-) - Body ground	Always	10 kΩ or higher
F8-4 (+) - Body ground	Always	10 kΩ or higher
F8-3 (+TW) - Body ground	Always	10 kΩ or higher
F8-1 (-TW) - Body ground	Always	10 kΩ or higher
F12-1 - Body ground	Always	10 kΩ or higher
F12-2 - Body ground	Always	10 kΩ or higher

for RH Side
Tester Connection	Condition	Specified Condition
H20-3 (WFR+) - E1-1	Always	Below 1 Ω
H20-8 (WFR-) - E1-2	Always	Below 1 Ω
D125-1 (FR+) - D52-1 (+)	Always	Below 1 Ω
D125-5 (FR-) - D52-3 (-)	Always	Below 1 Ω
H20-2 (RR+) - D52-2 (TWR+)	Always	Below 1 Ω
H20-7 (RR-) - D52-4 (TWR-)	Always	Below 1 Ω
D126-1 (RR+) - F3-4 (+)	Always	Below 1 Ω
D126-3 (RR-) - F3-2 (-)	Always	Below 1 Ω
F11-1 - F3-3 (+TW)	Always	Below 1 Ω
F11-2 - F3-1 (-TW)	Always	Below 1 Ω
E1-1 - Body ground	Always	10 kΩ or higher
E1-2 - Body ground	Always	10 kΩ or higher
D52-2 (TWR+) - Body ground	Always	10 kΩ or higher
D52-4 (TWR-) - Body ground	Always	10 kΩ or higher
D52-1 (+) - Body ground	Always	10 kΩ or higher
D52-3 (-) - Body ground	Always	10 kΩ or higher
F3-2 (-) - Body ground	Always	10 kΩ or higher
F3-4 (+) - Body ground	Always	10 kΩ or higher
F3-3 (+TW) - Body ground	Always	10 kΩ or higher
F3-1 (-TW) - Body ground	Always	10 kΩ or higher
F11-1 - Body ground	Always	10 kΩ or higher
F11-2 - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY
1. Remove the front No. 1 speaker assembly Click here.
2. Inspect the front No. 1 speaker assembly Click here.
NG
REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

OK
INSPECT REAR NO. 1 SPEAKER ASSEMBLY
1. Remove the rear No. 1 speaker assembly Click here.
2. Inspect the rear No. 1 speaker assembly Click here.
NG
REPLACE REAR NO. 1 SPEAKER ASSEMBLY Click here

OK
CHECK FRONT NO. 2 SPEAKER ASSEMBLY
1. Temporarily replace the front No. 2 speaker assembly with a known good one Click here.
2. Clear the DTCs Click here.
3. Check for DTCs Click here.
  
  OK
  
  No DTCs are output.
  Tech Tips
  - 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.
OK
END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

NG
CHECK REAR NO. 2 SPEAKER ASSEMBLY
1. Temporarily replace the rear No. 2 speaker assembly with a known good one Click here.
2. Clear the DTCs Click here.
3. Check for DTCs Click here.
  
  OK
  
  No DTCs are output.
  Tech Tips
  - Connect all the connectors to the rear No. 2 speaker assemblies that were disconnected.
  - When there is a possibility that either the right or left rear speaker is defective, inspect by interchanging the right one with the left one.
  - Perform the above inspection on both LH and RH sides.
OK
END (REAR NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

NG
CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY
1. Temporarily replace the stereo component amplifier assembly with a known good one Click here.
2. Clear the DTCs Click here.
3. Check for DTCs Click here.
  
  OK
  
  No DTCs are output.
OK
END (STEREO COMPONENT AMPLIFIER ASSEMBLY IS DEFECTIVE)

NG
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here