Test Notes

Normal Operation
The air bag Electronic Crash Sensor (ECS) module checks for driver air bag module circuit shorts to ground by monitoring the voltage of Circuits 614 (GY/O) and 615 (GY/W) at Pins land 15. If the ECS detects a short to ground on either of these pins, it will store a Diagnostic Trouble Code (DTC) B1887 in memory and flash a Lamp Fault Code (LFC) 15 (or higher priority code if one exists) on the air bag indicator.

Possible Causes
A driver air bag ignitor circuit shorted to ground could be caused by:
^ a short to ground on Circuit 614 (GY/O).
^ a short to ground on Circuit 615 (GY/W).
^ a short to ground on the air bag sliding contact.
^ a short to ground on the driver air bag module.