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Home >> Lincoln >> 2009 >> MKX FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1102 (Instrument Cluster System) >> Diagnostic Tests >> Instrument Cluster (IC) >> Pinpoint Tests >> Pinpoint Test T: The Air Bag Warning Indicator Is Never/Always On >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

The instrument cluster receives the supplemental restraint system (SRS) status from the restraints control module (RCM) over the high speed controller area network (HS-CAN) communication bus. If an SRS concern is detected, the RCM sets a DTC and sends a message to the instrument cluster to turn on the air bag warning indicator. If the SRS status message is missing or is deemed invalid for more than 5 seconds, the instrument cluster sets DTC U0151 and defaults the air bag warning indicator on.

DTC U0151 - sets in continuous memory if the safety belt status message is missing for more than 5 seconds.

Possible Causes

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