Subaru Crosstrek Service Manual: Dtc b2a0c dcm internal fault

DIAGNOSIS START CONDITION:

When ignition switch is ON.

DTC DETECTING CONDITION:

• Main microcomputer and communication circuit IC cannot communicate. (Defective IPC)

• SIM (communication chip) cannot be read. (Defective SIM)

• Telematics function cannot be used.

• 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 B2A0C displayed? (Current malfunction)

Replace the DCM. Data Communication Module">

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.

Dtc b2a0b green led circuit

Dtc b2a0d airbag signal

Other materials:

Driving tips
Do not drive with your foot resting on the clutch pedal and do not use the clutch to hold your vehicle at a standstill on an upgrade. Either of those actions may cause clutch damage. Do not drive with your hand resting on the shift lever. This may cause wear on the transmission components. ...

Inspection
FUEL INJECTION (FUEL SYSTEMS)(H4DO) > Rear Oxygen SensorINSPECTION1. Check that the rear oxygen sensor has no deformation, cracks or other damages.2. Measure the resistance between rear oxygen sensor terminals.Terminal No.Standard1 and 25.6+1.7 −0.6 ? (when 20°C (68°F) ...

Procedure
LAN SYSTEM (DIAGNOSTICS) > CAN Communication Circuit CheckPROCEDURENOTE:• When measuring the resistance of CAN communication circuit, measure it in sleep status.To enter sleep status– With ignition switch OFF and key or switch operation stopped, keep the doors, trunk, and rear gate all c ...