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.
Click here .gif)
PROCEDURE
| 1. | CHECK DTC |
(a) Check for DTCs.
Click here
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 | .gif) | REPLACE AIRBAG ECU ASSEMBLY |
| DTC B1000 and other DTCs are output | | GO TO DIAGNOSTIC TROUBLE CODE CHART |
READ NEXT:
Front Airbag Sensor (RH) (B1610)
DESCRIPTION The front airbag sensor RH consists of a diagnostic circuit and frontal deceleration sensor, etc. If the airbag ECU assembly receives signals from the frontal deceleration sensor, it deter
Front Airbag Sensor Lost Communication (RH) (B1612,B1613)
DESCRIPTION The front airbag sensor RH circuit consists of the airbag ECU assembly and front airbag sensor RH. The front airbag sensor RH detects impacts to the vehicle and sends signals to the airbag
Front Airbag Sensor (LH) (B1615)
DESCRIPTION The front airbag sensor LH consists of a diagnostic circuit and frontal deceleration sensor, etc. If the airbag ECU assembly receives signals from the frontal deceleration sensor, it deter
SEE MORE:
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE:
Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).
If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.
When replacing the combination meter assembly, always replace it with
Diagnosis System
DIAGNOSIS SYSTEM CHECK DLC3 (a) Check the DLC3. Click here FUNCTION OF PASSENGER AIRBAG ON/OFF INDICATOR (a) Initial check (1) Turn the power switch on (IG). (2) The passenger airbag ON/OFF indicator comes on for approximately 4 seconds, and then goes off for approximately 2 seconds. (3) Approxim
