LEMON Manuals: Even more car manuals for everyone
Home >> Lincoln >> 2004 >> Navigator RWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Cluster >> Diagnosis And Testing >> Instrument Cluster >> Principles of Operation

Principles of Operation

The Expedition and Navigator instrument clusters are configurable, hybrid electronic clusters (HEC) that contain a microprocessor, gauges, indicator lamps, and internal circuitry. The instrument cluster is non-repairable at the dealership level with the exception of the warning indicator bulbs on the Expedition only and the instrument cluster lens on both the Expedition and Navigator clusters. The instrument cluster utilizes hardwired circuitry, the standard corporate protocol (SCP), and universal asynchronous receiver-transmitter (UART)-based protocol (UBP) communication networks. Communication using the SCP network transmits and receives data between the instrument cluster, the powertrain control module (PCM), and the anti-lock brake system/traction control/integrated vehicle dynamics (ABS/TC/IVD) module. Communication using the UBP network utilizes data transmitted and received by the instrument cluster and the four-wheel drive control module, power liftgate module (Navigator only), parking aid module, air suspension module, vehicle security module, driver seat module and the electronic air temperature control (EATC). For additional information regarding the SCP and UBP communication networks, refer to MODULE COMMUNICATIONS NETWORK .

It is very important to understand:

The instrument cluster carries out a display prove-out to verify that the warning/indicator lamps and monitored systems are operating correctly. When the ignition switch is turned to the ON position with the engine off, the following indicators will illuminate:

scientia non olet · About LEMON Manuals