Test O: DTC B1891-Air Bag Tone Warning Circuit Shorted Batt/Ign
O1
O1 - O2
O2 - O3
O4 - O5
Normal Operation
The air bag Electronic Crash Sensor (ECS) module monitors its connection to the Total Warning System (TWS) module at pin 13. This connection is used to signal a chime if the air bag indicator is inoperative. If the ECS detects a short to battery or ignition on the connection to the TWS, it will store a Diagnostic Trouble Code (DTC) B1891 in memory.
Possible Causes
An air bag tone warning indicator circuit shorted to battery or ignition could be caused by:
a short to battery or ignition on circuit 940 (GY).
