Subaru Crosstrek Service Manual: Dtc b2a0b green led circuit

Diagnosis start condition:

When ACC is ON.

DTC detecting condition:

• Current in LED is less than 1 mA. (Improper LED connection, etc.)

• Current is more than 200 mA for at least 50 ms. (Short-circuited LED, etc.)

For the coupling connector, refer to “WIRING SYSTEM”.

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

1.CHECK DTC.

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

Is DTC B2A0B displayed? (Current malfunction)

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0B GREEN LED 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.PERFORM THE SYSTEM OPERATION CHECK.

Perform [GREEN LED Lighting] in the system operation check mode. System Operation Check Mode">

Does the GREEN LED illuminate?

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.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0B GREEN LED CIRCUIT">Go to Step 3.

3.CHECK HARNESS (OPEN CIRCUIT).

1) Turn the ignition switch to OFF.

2) Disconnect the telematics button connector.

3) Disconnect the DCM connector.

4) Measure the resistance between telematics button connector and DCM connector.

Connector & terminal

(i270) No. 3 — (AD2) No. 4:

(AD2) No. 1 — Chassis ground:

Is the resistance 1 ? or less?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0B GREEN LED CIRCUIT">Go to Step 4.

Repair or replace the open circuit of harness.

4.CHECK HARNESS (GROUND SHORT CIRCUIT).

Measure the resistance between DCM connector and chassis ground.

Connector & terminal

(i270) No. 3 — Chassis ground:

Is the resistance 1 M? or more?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0B GREEN LED CIRCUIT">Go to Step 5.

Repair or replace the short circuit of the harness.

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

Measure the voltage between DCM connector and chassis ground.

Connector & terminal

(i270) No. 3 (+) — Chassis ground (−):

(AD2) No. 1 (+) — Chassis ground (−):

Is the voltage less than 1 V?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0B GREEN LED CIRCUIT">Go to Step 6.

Repair or replace the short circuit of the harness.

6.CHECK THE TELEMATICS BUTTON (LED) UNIT.

Measure the resistance of the telematics button (LED) unit.

Terminals

No. 4 — No. 1:

Is there continuity?

Replace the DCM. Data Communication Module">

Replace the telematics button. Switches and Harness">

Dtc b2a0a red led circuit

Dtc b2a0c dcm internal fault

Other materials:

Dtc b1908 short in front p/t lh (to +b)
AIRBAG SYSTEM (DIAGNOSTICS) > Diagnostic Chart with Trouble CodeDTC B1908 SHORT IN FRONT P/T LH (TO +B)Diagnosis start condition:Ignition voltage is 10 V to 16 V.DTC detecting condition:• Seat belt pretensioner (LH) circuit is shorted to power supply.• Pretensioner (LH) is faulty.&bul ...

Removal
PARKING BRAKE > Parking Brake LeverREMOVALCAUTION:Refer to “CAUTION” of “General Description” before handling the airbag system components. General Description > CAUTION">1. Set the wheel stoppers to tires.2. Remove the headrest assembly - front.3. Move the pas ...

Installation
WIPER AND WASHER SYSTEMS > Front Wiper ArmINSTALLATION1. MODELS WITHOUT EyeSight1. Install the arm assembly - windshield wiper.(1) Assemble the arm assembly - windshield wiper so that the blade assembly - windshield wiper is aligned to the ceramic print point mark of the windshield glass.(2) Tigh ...