Subaru Crosstrek Service Manual: Dtc b2a0e mute line circuit

Diagnosis start condition:

When ignition switch is ON.

DTC detecting condition:

Any of the following conditions occurs continuously for five seconds or more after the ignition switch is turned to ON when DCM does not mute the audio or navigation system.

• Current in the mute line is less than 1 mA. (Improper line connection, etc.)

• Current exceeds 50 mA. (Short-circuited line, etc.)

• The mute function of audio or navigation system does not operate.

• RED LED illuminates.

CommCheck is required after replacing the DCM. Telematics System > OPERATION">

1.CHECK DTC.

Read the DTC. Diagnostic Code(s) Display">

Is DTC B2A0E displayed? (Current malfunction)

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0E MUTE LINE CIRCUIT">Go to Step 2.

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.

In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

2.CHECK HARNESS (OPEN CIRCUIT).

1) Turn the ignition switch to OFF.

2) Disconnect the audio or navigation connector.

3) Disconnect the DCM connector.

4) Measure the resistance between audio or navigation connector and DCM connector.

Connector & terminal

(i270) No. 19 — (i272) No. 8:

Is the resistance 1 ? or less?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0E MUTE LINE CIRCUIT">Go to Step 3.

Repair or replace the open circuit of harness.

3.CHECK HARNESS (GROUND SHORT CIRCUIT).

Measure the resistance between DCM connector and chassis ground.

Connector & terminal

(i270) No. 19 — Chassis ground:

Is the resistance 1 M? or more?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0E MUTE LINE CIRCUIT">Go to Step 4.

Repair or replace the short circuit of the harness.

4.CHECK THE CONNECTOR (SHORT CIRCUIT TO POWER SUPPLY).

Measure the voltage between DCM connector and chassis ground.

Connector & terminal

(i270) No. 19 (+) — Chassis ground (−):

Is the voltage less than 1 V?

Replace the DCM. Data Communication Module">

Repair or replace the short circuit of the harness.

Dtc b2a0d airbag signal

Dtc b2a0f backup battery degradation

Other materials:

Basic operation
Control switch Up (select) ENTER (push) Down (select) By operating "  " or "  " of the control switch, the screens and selection items can be switched. When the button is pushed, the item can be selected and set. ...

Maintenance
Carry some emergency equipment, such as a window scraper, a bag of sand, flares, a small shovel and jumper cables. Check the battery and cables. Cold temperatures reduce battery capacity. The battery must be in good condition to provide enough power for cold winter starts. It normally ...

U.S.-spec. models (type B)
The illustration above is a typical example. For some models, the combination meter may be slightly different than that shown in the illustration. Tachometer Multi information display Fuel gauge Select lever/gear position indicator Speedometer Information display selection knob ...