How a Battery Functions

DTC B0004-11 Overview

If a current (or 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.

Inspection Outline

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

Inspection Items

1. Driver's Knee Airbag Inspection
2. External Circuit RKA+, RKA- Shorted Wire Inspection
3. SRS Unit Inspection

1. Driver's Knee Airbag 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.

• Test Procedure

Driver's knee airbag circuit inspection

• Preparation

－Driver's knee airbag inflator 2P connector: disconnected

• Procedure

1.Perform the confirmation procedure.

• Normal Conditions

－DTC B0004-11 is not indicated.

• Results

If it is normal, there is a problem with the driver's knee airbag.
If it is abnormal, there is a problem with other related components.

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

• Test Procedure

Preparation

－SRS unit connector A (43P): disconnected
－Driver's knee airbag inflator 2P connector: disconnected

• 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.