2-BOARD ECM USAGE PRODUCTION CHANGED INTRODUCED. Pontiac Phoenix 1982

For 1990-2009 cars

# 2-BOARD ECM USAGE PRODUCTION CHANGED INTRODUCED

Recently, a new design Electronic Control Module (ECM) has been introduced into production. This new ECM is referred to as a 2-board ECM, versus the first design (3-board).

The 2-board ECM is used on all J2000's equipped with the 1.8L OHC-FI engine. This new ECM is also introduced on later built Phoenix, 6000, and Firebird models equipped with the 2.5L EFI L-4 engine.

The most significant difference is size. The new ECM is narrower than the first design (3-board) ECM. A vehicle equipped with a 2-board ECM should not be serviced with a 3-board ECM.

Included in this bulletin is a list of PROM part numbers and their usage. Some of this information is not found in the parts catalog and should be used for reference.

Service part number for the 2-board (second design) ECM is 1225610. The service part number for the 3-board (first design) ECM is 1225570.

2-BOARD PROM PART NUMBERS

2.5L L-4 EFI PROM ECM PART BROADCAST USAGE NUMBER CODE ----- ------ ---- "X" Manual 4-Spd. (Nationwide) 1226108 BNC or WT "F" Manual 4-Spd. (Nationwide) 1226111 BND or WY "A" Automatic (Federal) 1226105 BNF "A & X" Automatic (Nationwide) 1226106 BNH "F" Automatic (Nationwide) 1226107 BNJ "X" Manual 4-Spd. (Federal) 1226109 BNK or WW "F" Manual 4-Spd. (Federal) 1226110 BNL or WZ

1.8L OHC-FI

PROM ECM PART BROADCAST USAGE NUMBER CODE ----- ------ ----- "J" Automatic (California) 1226066 XM "J" Automatic (Federal) 1226067 XA

3-BOARD PROM PART NUMBERS

2.5L L-4 EFI PROM ECM PART BROADCAST USAGE NUMBER CODE ----- ------ ---- "A" Automatic (Federal) 1225578 AOL "A & X" Automatic (Nationwide) 1226113 AOS "F" Automatic (Nationwide) 1225580 AOT "F" HTR Manual (Federal) 1225575 UW "F" Manual (Nationwide) 1225572 UX "X" Manual (Nationwide) 1225571 US "X" Manual (Federal) 1225573 UN

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.