B1620

DTC B1620 SIDE AIRBAG SENSOR ASSEMBLY (D SEAT SIDE) MALFUNCTION

CIRCUIT DESCRIPTION

DTC Detecting Conditions:

The side airbag sensor assembly LH consists of parts such as the safing sensor, the diagnostic circuit and the lateral deceleration sensor. The configuration of the side airbag sensor assembly RH is the same as that of the LH.

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

DTC B1620/21 is set when a malfunction is detected in the side airbag sensor assembly (D seat side) circuit.

Wiring Diagram:

Step 1:

Step 2 - 4:

Step 5 - 6:

Step 7 - 8:

Step 9 - 11:

Step 12 - 13:

Step 14 - 15:

Step 16:

Step 17 - 19:

Step 20 - 21:

Step 22 - 23:

Step 24 - 26:

Step 27 - 28:

Step 29 - 30:

Step 31 - 32:

Step 33 - 35:

Step 36 - 37:

Step 38 - 40:

Step 41 - 42:

Step 43 - 45:

Step 46 - 47:

Step 48 - 50:

Step 51 - 53:

Step 54 - 55:

Step 56:

Step 57:

INSPECTION PROCEDURE

CAUTION: 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 airbag sensor assembly center connector is necessary.

a. Turn the ignition switch to the LOCK position.
b. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
c. Disconnect the connectors from the airbag sensor assembly center.
d. Disconnect the connectors from the horn button assembly.
e. Disconnect the connector from the front passenger airbag assembly.

HINT: Skip steps (f) to (i) if side and curtain shield airbags are not fitted.

f. Disconnect the connector from the front seat airbag assembly LH.
g. Disconnect the connector from the front seat airbag assembly RH.
h. Disconnect the connector from the curtain shield airbag assembly LH.
i. Disconnect the connector from the curtain shield airbag assembly RH.
j. Disconnect the connector from the front seat outer belt assembly LH.
k. Disconnect the connector from the front seat outer belt assembly RH.