For 1990-2009 cars

# BCM EPROM CALIBRATIONS(SUMMARYOF SERVICE EPROM'S)

#### SUBJECT: BCM EPROM CALIBRATION - SUMMARY OF SERVICE EPROMS

#### VEHICLES AFFECTED: 1985-1990 C, E,K, V MODELS

This bulletin supersedes bulletin #88-8-163 which should be discarded. This Bulletin is being revised to include additional model years and part numbers.

The following charts summarize all of the EPROM calibrations made on 1985-1990 BCM equipped vehicles. When any diagnosis leads to BCM EPROM replacement, the latest service EPROM part number listed should be used. Should any additional EPROM calibration changes by made, the CANSPO parts distribution system will automatically supersede these service part numbers.

EPROM changes may be made for may different reasons. For instance, a calibration change may be made in conjunction with a components change for a repair relative to a current field condition, or as a running change to provide minor modifications affecting the Electronic Climate Control or other BCM controlled systems. Therefore, if an EPROM I.D. is different than that of the latest EPROM available it does not necessarily need replacement. Refer to the bulletin listed for details about the symptom that may require an EPROM change.

The broadcast code is on a sticker on the EPROM. The PROM I.D. is BCM parameter P.3.1 on the DeVille/Fleetwood and parameter BD99 on the Eldorado, Seville and Allante.

#### IMPORTANT: PROM and BCM are ESD sensitive. Refer to Section BA-4-0 of any Cadillac 1990 Service Information Manual for handling procedures.

DeVille/Fleetwood ----------------- BCM Service EPROM Broadcast PROM Year P/N P/N Code I.D. Use Bulletin ---- ------- -------- ------- --- --- -------- 1985 1226464 16043729 CLW 10 gas 16043738 CLX 110 diesel 16043744 CLY 200 limo

16040601 DDM 11 gas 85-8-107 16040595 DDL 111 diesel 85-8-107

16053562 HRY 13 gas 16053567 HRZ 113 diesel 16053576 HSA 203 limo

01228026 HRY 14 gas 86-1-113 01228024 HRZ 114 diesel 86-1-113 01228025 HSA 204 limo 86-1-113

1986 1226464 16062532 AAPT 20 gas 86-1-113 16062546 AAPU 220 limo 86-1-113

1987 1226464 16065445 AATF 21 gas 16066559 AATH 221 limo

1988 1226464 16083257 AHSA 22

16120512 AMXN 23 gas 16122026 ANAU 24 gas 89-1-118 16122030 ANAW 224 COM. 89-1-118 chassis

1989 1228784 16122557 AHSC gas 16122561 AHSD 30 gas 89-1-118 16138772 ARTZ 31 gas 89-1-118

1990 16130754 16144216 ARFD 41

Eldorado and Seville

BCM Service EPROM Broadcast PROM Year P/N P/N Code I.D. Bulletin ---- -------- -------- ------- ---- -------- 1986 1227333 16059147 ATC 7296

16061814 AAAZ 0406 86-8-127 16068128 ABPU 8128 86-8-127

01228418 ABPU 8418 7A09 01228483 ABPU 8483 7A09 16140207 ASLN 0206 89-8-165

1987 1227333 16070372 AATL 4836

16075605 AFUM 5456 7A09 16140210 ASLP 0216 89-8-165

1988 1227333 16080212 AJUT 0186 16128252 ANUD 8256 ** 16139065 ASCD 9066 89-8-165 16151993 AUPL 1996

1989 1228786 16123760 ANDP 3776 16133928 APYK 3426 16138881 ASAP 8766 89-8-165 16145908 ATPU 5916 89-1-143 16151037 AUKN 1046

1990 1228786 16132342 ANXX 9236

16151314 AUKP 1056

Allante

BCM Red Gray Service EPROM EPROM Broadcast PROM Year P/N P/N P/N Code I.D. ---- ------- -------- -------- ----- ---- 1987 1227751 16071807 16071804 ACLJ 9396

16074487 16074484 AFRA 4416

1988 1228171 16089573 16089568 AMRP 9486

1989 1228785 16129737 16129727 ANZX 9726 16133916 16133913 APYL 3436

1990 1228785 16143840 16143836 ATCJ 3446

#### Bulletin Description:

86-1-113 Group 1: Insufficient cooling at idle

89-1-118 Group 1: Service A/C light with F46/F47

89-1-143 Group 1: ECC controls too cold

86-8-127 Group 8: Special policy for shift indicator display, also includes washer fluid level fix and HVAC calibration update

7A09 Group 8: Headlight campaign

89-8-165 Group 8: Clock gains or loses time

* Retained accessory power timer calibration

** Canadian fuel economy calibration

*** Repair for false code B552

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.