Regal V6-191 3.1L (1991)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
A/C Compressor - Operation During Start-Up
Bulletin 91-6E-8
Date Feb. '91
Ref. No. 91-083-6E
Corp. Ref. No. 006505
SUBJECT: A/C COMPRESSOR OPERATION DURING START-UP TO CONTROL RPM FLARE VEHICLES EQUIPPED WITH THE 3800 T.P.I.
ENGINE (VIN L)
MODELS AFFECTED:
1991 PARK AVENUE ULTRA WITH 3800 T.P.I. ENGINE (VIN L) BUILT PRIOR TO M1626149, 1990-91 REGAL
MODELS, FEDERAL EMISSIONS - BUILT PRIOR TO M1813629, 1990-91 REGAL MODELS, CALIFORNIA
EMISSIONS, BUILT PRIOR TO M1813961
From start of production, the above vehicles with listed serial numbers, allows during each ignition cycle the A/C compressor to engage, up to five
seconds, to minimize engine RPM flare with the A/C mode switch in the on or off position. A/C compressor engagement during start-up on vehicles that
have a sudden loss of refrigerant or have lost all the refrigerant over a period of time, may contribute to an A/C compressor failure.
If a technician is servicing the A/C system on a vehicle built prior to the breakpoint listed, it is recommended that a new calibration mem-cal be installed,
in conjunction with the A/C system repairs.
The new calibration will eliminate A/C compressor operation during engine start-up.
The mem-cals are currently available through GMSPO under the following part numbers.
SCANNER
ID IF
APPLI-
AXLE
MEM-CAL
BROAD-
SERVICE
YEAR
MODEL
CATION
RATIO
INSTALLED CAST
PART #
1991
Park Ave./Ultra
Fed.
F17/2.84
9994
AXDH
16160178
1991
Park Ave./Ultra
Calif.
F17/2.84
0004
AXDJ
16160173
1991
Park Ave./Ultra
Fed.
opt. 3.06 *
0014
AXDK
16160168
1991
Park Ave./Ultra
Calif.
opt. 3.06 *
0024
AXDL
16160163
1990-91 Regal
Fed.
All
0044
AXDN
16160153
1990-91 Regal
Calif.
All
0054
AXDP
16160148
*
Part of Option Package Y56 or V92
IMPORTANT:
The new calibration mem-cals are currently being used in production. Verify if this mem-cal is already installed by the scanner I.D.
WARRANTY INFORMATION:
Use applicable Labor Time Guide Operation Number and Time.
