DTC B2A06: Right Speaker/Audio Circuit
Diagnosis start condition :
After turning the ignition switch to OFF, open and close the door and wait for 5 minutes or more before turning the ignition switch to ON or performing the active test for the speaker using Subaru Select Monitor.
DTC detecting condition :
Speaker impedance is more than 10 KΩ for 100 ms. (Detached speaker connection, etc.)
Trouble symptom :
- Call function cannot be used.
- RED LED illuminates.
Failure detection pattern :
- Detection by a single system (Primary Failure)
Warning light/indicator light :
- Both ON -
- GREEN LED ON -
- GREEN LED blinks -
- RED LED ONO
- RED LED blinks -
- Both OFF -
Wiring diagram :
Telematics Ref. to WIRING SYSTEM>TELEMATICS SYSTEM>WIRING DIAGRAM .
- Without audio amplifier
- After the DCM is replaced, registrations of CommCheck and immobilizer system are required. Ref. to ENTERTAINMENT & MONITORING>TELEMATICS SYSTEM>OPERATION>REGISTRATION (COMM CHECK) .
- Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to TELEMATICS SYSTEM (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION .
- CHECK DTC
.
- Turn the ignition switch to ON.
- Read the DTC of [Telematics] using the Subaru Select Monitor. Ref. to TELEMATICS SYSTEM (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC B2A06 displayed? (Current code)
Yes : GO TO 2.
No : Even if DTC is displayed, the circuit has returned to a normal condition at this time.
Reproduce the failure, and then perform the diagnosis again.
NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause. - PERFORM ACTIVE TEST
.
Using the Subaru Select Monitor, check the following items in the [Active Test] of [Telematics]. Ref. to TELEMATICS SYSTEM (DIAGNOSTICS)>ACTIVE TEST .
- Speaker ON
Does it sound?
Yes : Even if DTC is displayed, the circuit has returned to a normal condition at this time.
Reproduce the failure, and then perform the diagnosis again.
NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.No : GO TO 3.
- CHECK HARNESS (OPEN CIRCUIT)
.
- Turn the ignition switch to OFF.
- Disconnect the speaker connector and tweeter connector.
- Disconnect the DCM connector.
- Measure the resistance between speaker connector and tweeter connector and DCM connector.
Connector & terminal
(i106) No. 4 - (Df57) No. 1 :
(i106) No. 4 - (i197) No. 3 :
(i106) No. 12 - (Df57) No. 2 :
(i106) No. 12 - (i197) No. 1 :
(i106) No. 4 - (i197) No. 3 :
(i106) No. 12 - (i197) No. 1 :
Is the resistance 1 Ω or less?
Yes : GO TO 4.
No : Repair or replace the open circuit of harness.
- CHECK HARNESS (GROUND SHORT CIRCUIT)
.
Measure the resistance between DCM connector and chassis ground.
Connector & terminal
(i106) No. 4 - Chassis ground :
(i106) No. 12 - Chassis ground :
Is the resistance 1 MΩ or more?
Yes : GO TO 5.
No : Repair or replace the short circuit of the harness.
- CHECK THE CONNECTOR (SHORT CIRCUIT TO POWER SUPPLY)
.
- Turn the ignition switch to ON.
- Measure the voltage between DCM connector and chassis ground.
Connector & terminal
(i106) No. 4 (+) - Chassis ground (-) :
(i106) No. 12 (+) - Chassis ground (-) :
Is the voltage less than 1 V?
Yes : GO TO 6.
No : Repair or replace the short circuit of the harness.
- CHECK THE SPEAKER
.
- Turn the ignition switch to OFF.
- Using a tester, measure the internal resistance of each speaker.
Terminals
Without audio amplifier
Side tweeter (in the figure below)
No. 1 - No. 2:
Front door speaker
No. 1 - No. 2:
With audio amplifier
Side tweeter
No. 3 - No. 1:
Is the resistance 3.15 - 3.85 Ω or more? (Side tweeter without audio amplifier)
Is the resistance 3.33 - 4.07 Ω or more? (Front door speaker without audio amplifier)
Is the resistance 3.05 - 4.65 Ω or more? (Side tweeter with audio amplifier)
Yes : Replace the DCM. Ref. to ENTERTAINMENT & MONITORING>DATA COMMUNICATION MODULE .
No : Replace the speaker and tweeter. Ref. to ENTERTAINMENT & MONITORING>FRONT SPEAKER .