INOP. OR MALFUNCTIONING GAGES REPLACE THE I/P CLUSTER

SUBJECT INOPERATIVE OR MALFUNCTIONING GAGES ON I/P CLUSTER (REPLACE THE CLUSTER)

MODELS/YEARS 1990 TORONADO AND TROFEO MODELS

Some 1990 Oldsmobile Trofeo and Toronado models equipped with analog I/P clusters may experience inoperative or malfunctioning cluster gages due to damaged flex circuit boards internal to the cluster. The affected vehicles may also experience a high pitched whining noise coming from the cluster. The noise may appear to be intermittent because it varies with gage position. Example: The fuel gage may be noisy around 1/4 tank.

To repair the whining noise condition replace the cluster. Follow the exchange procedure in Management Bulletin 90-1-3A.

IMPORTANT: The Driver Information Display (DID), on vehicles so equipped, may exhibit a high pitched whine noise which may be heard by some owners. This noise is similar to the one emitted by some television sets and is normal. The DID may be referred to by some people as the CRT or VIC.

To repair an inoperative or malfunctioning gage it is first necessary to determine whether the cluster gage or the associated BCM system or wiring is at fault. To verify that the gage is inoperative check the associated data parameter through the on-board diagnostics. Refer to Section 8D in the 1990 Trofeo/Toronado Service Manual for instructions on entering diagnostics. The following list provides the gage name and associated data parameter.

Speedometer: ED12 (VSS)

Oil Pressure: BD71

Coolant Temperature: ED04 (Diagnostics displays coolant temperature in Celsius. To convert to Fahrenheit multiply by 1.8 and add 32)

Tachometer: ED11

Battery Voltage: ED10

Fuel Level: BD40

If the value in diagnostics is reasonable, but different than the cluster gage display, replace the cluster. Example: Battery voltage ED10 is 14.5 in diagnostics with engine running and cluster gage is 0 volts, replace cluster. Follow the exchange procedure in Management Bulletin 90-1-3A.

WARRANTY INFORMATION:

Labor Operation Number: N4180 Labor Time: See current Labor Time Guide Trouble Code: 92

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.