Smart Cluster Features/Operation

ELECTO/MECHANICAL INSTRUMENT CLUSTER (EMIC)

Smart Cluster Features
The Electro/Mechanical Instrument Cluster houses the Fuel, Voltmeter, Engine Coolant Temp, and Oil Pressure gauges, the Speedometer and the Tachometer. The cluster positions the analog gauges using PCI Bus messages received from the PCM. The cluster also contains 11 (eleven) warning indicators as well as indicators for the Right and Left turn signals and the High Beam headlamps. Some of the indicators are hardwired to the cluster and some indicators are controlled by messages received on the PCI Bus. The vehicle Chime function, Courtesy Lamp Output, the Battery Saver function, and the Rear Window Defogger timer are contained internally within the cluster. The cluster contains a Vacuum Fluorescent (VF) display for the Odometer/Trip function. The cluster VF will also display P-codes and vehicle status messages. The cluster has the ability to store DTCs, communicate on the PCI Bus, display engine information, and display certain inputs using the DRBIII. The cluster is also able to perform a manual self-test.

Rear Window Defogger
The timing circuit for the Rear Window Defogger is contained internally within the cluster. When the ignition is ON, the first actuation of the Rear Window Defogger switch initiates a 10 (ten) minute time cycle. After 10 (ten) minutes of the same ignition cycle has elapsed, the cluster will turn the defogger OFF by opening the ground to the Rear Window Defogger Relay. If the defogger switch is actuated a second time during the same ignition cycle, the cluster will turn the defogger OFF after 5 (five) minutes. While the defogger is on, depressing the switch a second time will turn the defogger off. If the ignition is turned OFF while the defogger is operating, the defogger will remain OFF when the ignition is cycled.

Normal Operation
As the ignition switch is rotated to the on position, the cluster will illuminate the Low Fuel, Seat Belt, Check Gauges, Airbag, SKIM, and Upshift (if equipped with a manual transmission) indicators. As the ignition switch is rotated towards the start position, the cluster will illuminate the Brake and ABS (if equipped) indicators. The vacuum fluorescent (VF) display will indicate the last selected mode, either Odometer or Trip. The Odometer will remain in the last mode selected, Odometer or Trip, after each ignition cycle.

Instrument Cluster Self Test
The Instrument Cluster is capable of performing a manual self test. The self test is actuated by depressing and holding the trip reset button while turning the ignition from the OFF to the on position. The self test will terminate if the tachometer is greater than 300 RPM, the ignition is turned OFF or the test is complete. The cluster will perform the self test in the following manner:

1. Chime once.
2. Scroll an "8" across the VF.
3. Illuminate the VF decimal point.
4. Display the cluster software level (example: SOF 8.9).
5. Display the last 6 (six) digits of the Vehicle Identification Number (VIN).
6. Display fault codes in the VF display if set or scroll "no FAULTS" if no faults are set.
* ACM - Air Bag Message = bus b8.
* Indicator Open/Short = Airbag
* Panel Sense - Open Circuit = PanEL OPEn.
* PCM - MIL Message = buS b0.
* SKIM - SKIM Message = buS b1.

7. Illuminate all applicable indicators.
* Brake Warning
* Check Gauges
* Cruise
* High Beam
* Low Fuel Warning
* MIL (Malfunction Indicator Lamp)
* Part Time
* Seat Belt
* SKIM
* Upshift

8. Display Speedometer Calibration Points.
9. Display Fuel Gauge Calibration Points.
10. Display Temperature Gauge Calibration Points.
11. Display Tachometer Calibration Points.
12. Display Volt Gauge Calibration Points.
13. Display Oil Gauge Calibration Points.