Airbag System (For TMC Made)

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM (for TMC Made): B1620/21: Driver Side - Side Airbag Sensor Malfunction
B1620/21 - Driver Side - Side Airbag Sensor Malfunction

DESCRIPTION

The side airbag sensor LH consists of the safing sensor, the diagnostic circuit, the lateral deceleration sensor, etc.

If the center airbag sensor assembly receives signals from the lateral deceleration sensor, it determines whether the SRS should be activated.

DTC B1620/21 is recorded when a malfunction is detected in the side airbag sensor LH.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC

(a) Turn the ignition switch on (IG), and wait for at least 60 seconds.





(b) Clear the DTCs stored in the memory Airbag System (for TMC Made).

(c) Turn the ignition switch off.

(d) Turn the ignition switch on (IG), and wait for at least 60 seconds.

(e) Check the DTCs Airbag System (for TMC Made).

OK:

DTC B1620/21 is not output.

HINT
Codes other than DTC B1620/21 may be output at this time, but they are not related to this check.

OK -- USE SIMULATION METHOD TO CHECK Diagnosis System
NG -- Continue to next step.

2. 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 RH with LH 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 on (IG), and wait for at least 60 seconds.

(f) Clear the DTCs stored in the memory Airbag System (for TMC Made).

(g) Turn the ignition switch off.

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

(i) Check the DTCs Airbag System (for TMC Made).

Result:





HINT
Codes other than DTC B1620/21 and B1625/22 may be output at this time, but they are not related to this check.

B -- REPLACE SIDE AIRBAG SENSOR LH Removal

A -- CHECK CENTER AIRBAG SENSOR ASSEMBLY

C -- USE SIMULATION METHOD TO CHECK Diagnosis System

3. CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Turn the ignition switch off.





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

(c) Return the side airbag sensor RH and LH to their original positions 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 on (IG), and wait for at least 60 seconds.

(f) Clear the DTCs stored in the memory Airbag System (for TMC Made).

(g) Turn the ignition switch off.

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

(i) Check the DTCs Airbag System (for TMC Made).

OK:

DTC B1620/21 is not output.

HINT
Codes other than DTC B1620/21 may be output at this time, but they are not related to this check.

NG -- REPLACE CENTER AIRBAG SENOR ASSEMBLY Removal

OK -- USE SIMULATION METHOD TO CHECK Diagnosis System