B1620

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1620/21, B1622/81: Driver Side - Side Airbag Sensor Malfunction
B1622/81 - Lost Communication with Driver Side - Side Airbag Sensor Assembly

DESCRIPTION

The side airbag sensor LH consists of parts including the diagnostic circuit and the lateral deceleration sensor.

When the center airbag sensor assembly receives signals from the lateral deceleration sensor, it determines whether or not the SRS should be activated.

DTC B1620/21 or B1622/81 is set when a malfunction is detected in the side airbag sensor LH.





INSPECTION PROCEDURE

NOTICE:
In order to prevent unexpected airbag deployment, disconnect the following connectors before inspecting parts such as wire harnesses, if the application of tester probes to the center airbag sensor assembly connector is necessary.

1. Turn the ignition switch off.

2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

3. Disconnect the connector from the center airbag sensor assembly.

4. Disconnect the connectors from the steering pad.

5. Disconnect the connectors from the front passenger airbag assembly.

6. Disconnect the connector from the front seat outer belt assembly LH.

7. Disconnect the connector from the front seat outer belt assembly RH.

8. Disconnect the connector from the front seat side airbag assembly LH.

9. Disconnect the connector from the front seat side airbag assembly RH.

10. Disconnect the connector from the curtain shield airbag assembly LH.

11. Disconnect the connector from the curtain shield airbag assembly RH.

PROCEDURE

1. CHECK SIDE AIRBAG SENSOR LH

(a) Turn the ignition switch off.

(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

(c) Interchange the side airbag sensor LH with the side airbag sensor RH and connect the connectors to them.

(d) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

(e) Turn the ignition switch to the on position, and wait for at least 60 seconds.

(f) Clear the DTCs stored in the memory Reading and Clearing Diagnostic Trouble Codes.

(g) Turn the ignition switch to the lock position.

(h) Turn the ignition switch to the on position, and wait for at least 60 seconds.

(i) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT
DTCs other than DTC B1620/21, B1622/81, B1623/81, B1625/22, B1627/82 and B1628/82 may be output at this time, but they are not related to this check.

C -- REPLACE SIDE AIRBAG SENSOR LH

B -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY

A -- USE SIMULATION METHOD TO CHECK