Lexus NX: Airbag ECU Malfunction (B1000)

DESCRIPTION

The airbag ECU assembly consists of a deceleration sensor, safing sensor, drive circuit, diagnosis circuit, ignition control, etc.

If the airbag ECU assembly receives signals from the deceleration sensor, it determines whether or not the SRS should be activated.

DTC B1000 is stored when a malfunction is detected in the airbag ECU assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B1000

Airbag ECU Malfunction

An airbag ECU assembly malfunction.

Airbag ECU assembly

CAUTION / NOTICE / HINT

NOTICE:

After replacing the airbag ECU assembly, refer to initialization.

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PROCEDURE

1.

CHECK DTC

(a) Check for DTCs.

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Body Electrical > SRS Airbag > Trouble Codes

NOTICE:

If only DTC B1000 is output, do not clear the DTCs. Replace the airbag ECU assembly.

HINT:

If any DTCs other than DTC B1000 are also output, troubleshoot those DTCs first.

DTC B1000 is output

REPLACE AIRBAG ECU ASSEMBLY

DTC B1000 and other DTCs are output

GO TO DIAGNOSTIC TROUBLE CODE CHART

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