B1488

DTC B1488

Circuit Description

When the ignition switch is turned to ON, the sensing and diagnostic module (SDM) will perform a turn-on test to diagnose critical malfunctions within the SDM itself.

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 shorts to ground or voltage in the deployment loops.

The SDM inspects the wiring connection to the I/P module by letting the perpetual current flow through the internal circuit and verify the resistance. If the resistance is between 2-10 kilo ohms, the defect may occur depending upon the SDM. The normal resistance is over 10 kilo ohms.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B1488 Passenger Frontal Deployment Loop Stage 2 Shorted to Battery

Conditions for Running the DTC

Ignition voltage is within the normal operating voltage range.

Conditions for Setting the DTC

* The air bag wiring of the 2nd stage passenger high is shorted to battery.
* The air bag wiring of the 2nd stage passenger low is shorted to battery.

Action Taken When the DTC Sets

The SDM commands the AIR BAG indicator ON.

Conditions for Clearing the DTC

The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.