DTC B0021-13: Open or Increased Resistance in the Left Side Curtain Airbag First Inflator

DTC B0021-13 Overview

If a voltage on the detection line inside the SRS unit is higher than a specified value, the SRS unit determines an abnormality and stores the DTC.

The components to be tested are indicated by a dotted line.

Inspection Items

NOTICE:

Before disconnecting the SRS related connector, do the 12 volt battery terminal disconnection procedure and wait for at least 3 minutes.

NOTE:
Since there is no direct method to test the component itself, troubleshooting is performed on the related components.

Left side curtain airbag circuit inspection

Left side curtain airbag inflator 2P connector: disconnected

Install a jumper wire between left side curtain airbag inflator 2P connector terminals No. 1 and No. 2.
Perform the confirmation procedure.

DTC B0021-13 is not indicated.

■ Results

Preparation

Procedure

Perform the inspection according to the following table.

If abnormal, there is a problem in the circuit.

3. SRS Unit Inspection

If the other inspection item(s) indicated a normal condition, then it is determined that the remaining SRS unit is the cause.

There is a problem with the SRS unit.

Turn the vehicle to the ON mode, then wait for 10 seconds. DTC B0021-12