Mechanical Instrument Cluster (MIC)

SYSTEM OPERATION
Data Link Connector
Data link connector is located at the lower edge of the knee blocker to the right of the steering column. Reach inside of the opening and swing the data link connector down for access.

Electro-Mechanical Instrument Cluster
The mechanical instrument cluster is an electromechanical module which receives most of its information from the Body Control Module or Timing Control Module via the CCD bus.

Cluster Type - A:

Cluster Type - B:

Cluster Type - C:

There are three types of clusters, each cluster includes:
- 240 km/h (120 mph) speedometer
- Tachometer
- Odometer/trip odometer
- Fuel gauge
- Temperature gauge
- Electronic transmission range

The warning and information indicators include the following:
- Check Engine Soon
- Airbag
- Charging system
- Low oil pressure
- High temperature
- Low fuel
- Seat belt
- Cruise
- Brake/park brake
- High beam
- Turn signals

The gauges are the magnetic air-core type. When the ignition switch is OFF, the gauge pointers should rest at or below the low graduation.


CIRCUIT OPERATION
Instrument Cluster
The Instrument Cluster, located on the left side of the instrument panel, provides the operator with gauges and warning lamps indicating vehicle operation. All gauges, regardless of engine type, are driven by the CCD Bus from the Body Control Module (BCM).

The indicator lamps for the Seat Belt, Charging System, Vehicle Speed Control (Cruise), Airbag, Check Engine (Malfunction Indicator Lamp), Low Fuel, and Engine Coolant Temperature are also driven by the BCM.

Battery voltage for the instrument cluster is provided from two different sources. One is the F33 circuit which supplies battery voltage for the cluster. This circuit is protected by 15 amp fuse and located in cavity 9 of the junction block. Power for the fuse is supplied by circuit A13. This fuse is HOT at all times and protected by a 20 amp fuse located in cavity F of the Power Distribution Center (PDC).

The second power source for the cluster is the F11 circuit. This circuit is HOT in the OFF (unlock), START, and RUN positions. The F11 circuit is protected by a 5 amp fuse located in cavity 17 of the junction block.

Illumination lamps, internal to the cluster, receive battery voltage on the E2 circuit. This circuit originates in the BCM and lamp intensity is controlled by the BCM. Ground for the lamps is provided on the Z1 circuit and terminates at the Airbag Control Module (ACM) bracket.

Ground for the instrument cluster is supplied by circuit Z1 and Z2, which terminate at the ACM bracket.

Cluster Decode
Circuits D13 and D14 are connected between the Body Control Module (BCM) and the instrument cluster. These circuits are used to provide the BCM with information on the type of vehicle and mode of operation.

Cluster Ground
The cluster is grounded to the Airbag Control Module (ACM) bracket on circuits Z1 and Z2.