Cruise Control - Will Not Engage or Loses Speed
90cadillac07Bulletin No. T-90-73
File in Group 9
Number 68
Corp. Ref. No. 016505
Date May, 1990
SUBJECT: INTERMITTENT CRUISE CONTROL ENGAGEMENT
MODELS AFFECTED: 1990 ALLANTES
Some 1990 Allantes produced before VIN breakpoint 126127 may experience an intermittent condition where the cruise control will not engage or will lose speed when the set/coast button is depressed. This condition may be caused by an improper PROM calibration in the MEM-CAL unit of the ECM.
To identify the improperly calibrated PROM enter diagnostics and select ECM data, parameter ED99 "PROM I.D.". Check the parameter display against the PROM I.D. chart listed below. If the PROM I.D. matches, install the new service MEM-CAL listed to correct the engagement condition.
New New New
PROM Broadcast Service PROM Broadcast
Carline I.D. Code MEM-CAL I.D. Code
1990 Allante (USA) 2006 APNF 16151465 2009 AUNX
Export 2007 APJZ 16151467 2010 AUNY
Removal and installation procedures are located in Section 6E-C1 of the Service Information Manual.
Parts are currently available from GMSPO.
For warranty purposes use Labor Operation T0500 at .5 hour.