B1355

DTC B1355: 1st Stage Passenger Airbag Short to Power





Circuit Description

When the ignition switch is turned to ON, the Sensing and Diagnostic Module (SDM) will perform turn-ON test to diagnose critical malfunctions within SDM itself.

Upon passing these test ignition and deployment loop voltages are measured to ensure that they are within their normal voltage ranges. The SDM monitors the voltages at the driver low and the passenger low to detect short to ground or voltage in the deploy loops.

The SDM checks the wiring connection to the passenger airbag module by letting the infinitesimal current flow through the internal circuit and verify the resistance. If the resistance is in the 2 kohm between 10 kohm, the defect may occur depending upon SDM. The normal resistance is over 10 kohm.

DTC B1355 Will Set When
^ The airbag wiring of 1st stage passenger's high is shorted to battery wiring.
^ The airbag wiring of 1st stage passenger's low is shorted to battery wiring.

Troubleshooting

Step 1-6:

WARNING:
^ The Sensing and Diagnostic Module (SDM) can maintain sufficient voltage to deploy the airbags and pretensioners for 1 minute after the ignition is OFF and the fuse has been removed. If the airbags and pretensioners are not disconnected, do not begin service until 1 minute has passed after disconnecting power to SDM. Otherwise, injury could result.
^ During service procedure, be very careful when handling the SDM. Never strike or jar the SDM. Never power the Supplemental Inflatable Restraints (SIR) when the SDM is not rigidly attached to the vehicle. All SDM mounting bolts must be carefully tightened, and the arrow on the SDM must be point toward the front of the vehicle to ensure proper operation of the SIR. The SDM could be activated if it is powered when it is not rigidly attached to the vehicle, resulting in unexpected deployment and possible injury.