PRNDL, Clock, Fuel Data Displays - Erratic/Inaccurate
File In Section: 8 - Chassis/Body ElectricalBulletin No.: 63-83-06
Date: May, 1996
Subject:
Erratic/Inaccurate Displays for PRNDL, Clock and Fuel Data and/or Erroneous Fast Audible Warning Chimes (Replace Radio)
Models:
1996 Cadillac DeVille, Eldorado, Seville
with Base Radio, RPO U1L/UW6
Condition
Some of the above listed vehicles equipped with a base radio (RPO U1L/UW6) may intermittently exhibit a boxed PRNDL display (digital PC), an erratic clock display, and/or an inaccurate reading for average fuel economy and fuel used. The PC may display an average fuel economy as low as 2 mpg and fuel used as high as 99.9 gallons. Vehicle symptoms may also include an unusually fast audible warning chime that cannot be explained by an existing condition (i.e.; headlamps on or key in ignition).
Cause
This condition may be caused by a malfunctioning base radio interrupting the Class II communication lines.
Correction
To correct this condition, exchange the radio. The defective radios have a build date code of 100 (see Figure 1). Verify that IPC fuel data displays operate correctly after exchange.
Warranty Information
For vehicles repaired under warranty, use as shown:
Labor
Operation Description Labor Time
Receiver - Radio Use published
R0760 Remove, Repair labor operation
and Replace Radio time.