How a Battery Functions

Special Tools Required

SRS Short Canceller 070AZ-SAA0100

DTC B0028-1A Overview

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

Inspection Outline

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

Inspection Items

1. Right Side Airbag Inspection
2. External Circuit RFSA+, RFSA- Shorted Wire Inspection
3. SRS Unit Inspection

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.

1. Right Side Airbag Inspection

• Test Procedure

Right side airbag circuit inspection

• Preparation

Right side airbag inflator 2P connector: disconnected

• Procedure

Perform the confirmation procedure.

• Normal Conditions

DTC B0028-1A is not indicated.

• Results

If it is normal, there is a problem with the right side airbag.

If it is abnormal, there is a problem with other related components.

2. External Circuit RFSA+, RFSA- Shorted Wire Inspection

Test Procedure

• Preparation

SRS unit connector B (57P): disconnected

Right side airbag inflator 2P connector: disconnected

SRS unit connector B (57P) No. 5 and No. 6: connected to SRS short canceller

• Procedure

Perform the inspection according to the following table.

• Results

If abnormal, there is a problem in the circuit.

3. SRS Unit Inspection

• Test Procedure

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

• Results

There is a problem with the SRS unit.

Confirmation Procedure

Turn the vehicle to the ON mode, then wait for 10 seconds.