Test B: DTC B1868 - Lamp Air Bag Warning Indicator Circuit Failure
PINPOINT TEST B: DTC B1868 - LAMP AIR BAG WARNING INDICATOR CIRCUIT FAILURENormal Operation
During normal operation, the air bag warning indicator will illuminate continuously for approximately 6 seconds and then go out after the ignition switch is placed in the ON position and no air bag fault exists. Control of the air bag warning indicator is a function of the instrument cluster (IC) module based on information it receives from the restraints control module (RCM). The default mode for the air bag warning indicator is on. The RCM sends a message to the IC module to turn the indicator off if no air bag fault exists. If the RCM detects a problem with the supplemental restraint system (SRS) it will send a message to the IC module to turn the air bag warning indicator on.
If the IC module detects a problem with the air bag warning indicator, it will send a fault message to the RCM. The RCM and IC module will store DTC B1868 in memory.
- DTC B1868 Lamp Air Bag Warning Indicator Circuit Failure - If the RCM receives a message from the IC module of an air bag warning indicator failure, it will set this DTC.
This pinpoint test is intended to diagnose the following:
- IC module
- RCM
