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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 P: The High Beam 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.

When the high beams are turned on, the smart junction box (SJB) sends a signal to the instrument cluster through the medium speed controller area network (MS-CAN) communication bus to illuminate the high beam indicator. If the high beam status message is missing for more than 5 seconds, the instrument cluster sets DTC U0140 in continuous memory and defaults the high beam indicator off.

NOTE: If DTC U0140 is set in the instrument cluster, other observable symptoms may also be present such as tire pressure monitoring system (TPMS) warning indicator, backlight and door ajar indication.

Possible Causes

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