B1812

DTC B1812/53 SHORT IN D SQUIB (DUAL STAGE - 2ND STEP) CIRCUIT (TO GROUND)

CIRCUIT DESCRIPTION

DTC Detecting Condition:

The D squib (Dual stage - 2nd step) circuit consists of the airbag sensor assembly center, the spiral cable sub-assembly and the horn button assembly.

The circuit instructs the SRS to deploy when deployment conditions are met.

These DTCs are recorded when a malfunction is detected in the D squib (Dual stage - 2nd step) circuit.

Wiring Diagram:

Step 1:

Step 2-3:

Step 4-5:

Step 6:

Step 7-8:

Step 9:

Step 10:

Step 11:

Step 12:

Step 13-14:

Step 15-16:

Step 17-18:

Step 19-20:

Step 21:

Step 22:

INSPECTION PROCEDURE

CAUTION: Be sure to perform the following procedures before troubleshooting to avoid unexpected airbag deployment.

a. Turn the ignition switch off.
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 connectors from the front passenger airbag assembly.
f. Disconnect the connector from the instrument panel airbag assembly lower No.1.
g. Disconnect the connectors from the front seat airbag assembly LH and RH.
h. Disconnect the connectors from the curtain shield airbag assembly LH and RH.
i. Disconnect the connectors from the front seat outer belt assembly LH and RH.

HINT:
- Perform the simulation method by selecting the "check mode (signal check)" with the hand-held tester.
- After selecting the "check mode (signal check)", perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road.