Test S: DTC B1891 - Air Bag Tone Warning Indicator Circuit Short to Batt or Igni

S1:

S2:

S3 - S4:

S5:

Normal Operation
The air bag Electronic Crash Sensor (ECS) module monitors its connection to the Generic Electronic Module (GEM) at Pin C240a-8. This connection is used to signal a chime if the air bag indicator is inoperative and another Supplemental Restraint system (SRS) fault exists. If the ECS detects a short to battery or ignition on the connection to the GEM, it will store a Diagnostic Trouble Code (DTC) B1891 in memory.

Possible Causes
An air bag tone warning indicator circuit short to battery or ignition could be caused by:
^ a short to battery or ignition on Circuit 1083 (LB/BK).
^ a damaged or inoperative GEM.