Description & Operation

Instrument cluster is a Hybrid Electronic Cluster (HEC). Instrument cluster uses both hardwired and the Standard Corporate Protocol (SCP) communication network to transmit and receive information. As a technician it is very important to understand:

• Where the input originates from.
• All information necessary in order for a feature to operate.
• Which module(s) receive(s) the input or command message.
• Does the module which received the input control the output of the feature, or does it output a message over the SCP network to another module?
• Which module controls the output of the feature.

Instrument cluster carries out a display prove-out to verify that the warning/indicator miniature bulbs for monitored systems are functioning correctly. When the ignition switch is in the ON position with the engine off, the following warning indicators will prove out:

• Anti-Lock Brake System (ABS) warning indicator.
• Air bag warning indicator.
• BRAKE warning indicator.
• Charging system indicator.
• Fail safe cooling warning indicator.
• Low coolant level indicator.
• Low fuel warning indicator.
• Traction control indicator.

Instrument cluster contains a speedometer, tachometer, fuel gauge, temperature gauge, oil pressure gauge, voltmeter and odometer. Odometer/trip odometer are mounted at the bottom of speedometer. Warning lights are placed in line below speedometer and tachometer gauges. Turn signal and high beam indicators are mounted in top center of instrument cluster.

Instrument cluster gauges are not replaceable separately. Instrument cluster illumination light, warning indicators and instrument cluster lens are the only replaceable components. LOW FUEL light will illuminate when fuel level gets below 1/8 of a tank. SERVICE ENGINE SOON, AIR BAG, THEFT, O/D OFF, seat belt and traction control indicators will illuminate for 3 seconds after ignition switch is turned from LOCK to RUN position.