Test C: DTC B1868 - Lamp Air Bag Warning Indicator Circuit Failure
PINPOINT TEST C: 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) over the high-speed controller area network (HS-CAN). 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 restraints 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 and the RCM 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
