Test D: RCM Bracket Ground Resistance High (DTC B1921): Description

Restraints Control Module (RCM) monitors resistance between ground connections at its housing and reference ground at RCM connector C424, terminal No. 9 (Black-Red wire). If RCM detects resistance more than 100 ohms, it stores DTC B1921 in memory and AIR BAG warning light be continuously illuminated.