1999 Chevy Cavalier ECM Computer

Tiny
KATDOG44
  • MEMBER
  • 1999 CHEVROLET CAVALIER
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
How Do you remove the ecm computer.
Do you
have the same problem?
Yes
No
Sunday, December 14th, 2008 AT 4:38 AM

1 Reply

Tiny
DAVE H
  • EXPERT
COMPUTERIZED ENGINE CONTROLS
POWERTRAIN CONTROL MODULE (PCM)
CAUTION:Electronic components used in control systems are designed to carry very low voltages. As little as a 30-volt charge created by static electricity can cause a total or degrading failure in PCM or other electronic components containing integrated circuits. Before servicing PCM, technician must ground himself and the work area to discharge static electricity.

CAUTION:DO NOT remove part from packaging until ready to install. Ground any static-proof package before opening. DO NOT touch electrical terminals of components unless properly grounded. DO NOT lay electrical components on car seat, carpeting or dashboard. Use electrostatic protection mat and ground strap whenever possible.

NOTE:Before replacing PCM, carefully inspect all wiring and control components. Failure to test for short circuits may result in repeated PCM failure due to shorts. To prevent internal damage to PCM, ensure ignition switch is in OFF position when connecting or disconnecting PCM connectors or any electrical components.

Removal & Installation (Except 1.0L, 1.3L, 1.8L & 1.9L)
Turn ignition off. Disconnect negative battery cable. Locate PCM. See PCM LOCATION (EXCEPT 1.0L, 1.3L, 1.8L & 1.9L) table. Remove any necessary components to gain access to PCM. Disconnect harness connectors from PCM. Remove PCM mounting bolts (if equipped). Remove PCM. To install, reverse removal procedure. Transfer any necessary components (i.E, knock sensor module, EEPROM, etc.) To new PCM before installation. Program replacement PCM using appropriate equipment and latest software. See COMPUTER RELEARN PROCEDURES.
PCM LOCATION (EXCEPT 1.0L, 1.3L, 1.8L & 1.9L)
ApplicationLocation
2.2LIn Right Front Corner Of Engine Compartment
2.4L & 3.4LUnder Left Side Of Instrument Panel
3.0LOn Left Side Of Engine Compartment, In ECM Housing
3.1L
Century & Grand PrixOn Left Side Of Engine Compartment, In Air Cleaner Assembly
Cutlass & MalibuUnder Left Side Of Instrument Panel
Lumina & Monte CarloOn Right Side Of Engine Compartment, Forward Of Strut Tower
3.5LOn Left Side Of Engine Compartment, In Air Cleaner Assembly
3.8L
Bonneville, Eighty Eight, Grand Prix, Intrigue, LeSabre, LSS, Park Avenue & RegalOn Left Side Of Engine Compartment, In Air Cleaner Assembly
Camaro & FirebirdOn Right Side Of Firewall
Lumina & Monte CarloOn Right Side Of Engine Compartment, Forward Of Strut Tower
RivieraUnder Right Side Of Instrument Panel
4.0LUnder Right Side Of Instrument Panel
4.6LIn Left Front Corner Of Engine Compartment, Under Air Cleaner
5.7L
Camaro & FirebirdOn Right Side Of Firewall
CorvetteIn Right Front Wheelwell

Removal & Installation (1.0L & 1.3L)
Turn ignition off. Disconnect negative battery cable. Open glove box. Apply pressure to sides of glove box to disengage 2 clips. Pull glove box down. Remove 3 bolts and PCM bracket. Disconnect harness connectors from PCM. Remove PCM. To install, reverse removal procedure.
Removal & Installation (1.8L)
Turn ignition off. Disconnect negative battery cable. Remove glove box. Remove console support bracket. Remove left lower finish panel and backing panel. Remove center finish panel. Remove radio.
Remove 2 bolts in rear console box. Remove 2 screws on sides of center console. Slide rear portion of center console back toward rear seats. Remove 2 upper screws on front position of console and remove front portion of console.
Disconnect harness connectors from PCM. Remove mounting bolts from PCM. Remove PCM. To install, reverse removal procedure.
Removal (1.9L)
Disconnect negative battery cable. Remove instrument panel upper trim panel outer cover fillers by lifting up at clip locations, starting at rear, above end cap. Remove instrument panel upper trim panel retaining bolt caps and retaining screws. Lift up on instrument panel upper trim panel and pull rearward, being careful not to damage VIN plate.
Remove instrument panel upper trim pad sound insulator. Disconnect PCM harness connectors. Loosen PCM attachment at cross-car beam. Lift PCM upward toward windshield, to disengage from bracket.
Installation
Lower PCM into bracket while guiding attachment stud into slot in cross-car beam. Tighten PCM mounting nut to 89 INCH lbs. (10 N.M). To complete installation, reverse removal procedure. Program replacement PCM using appropriate equipment and latest software. See COMPUTER RELEARN PROCEDURES.
ELECTRONICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM)
EEPROM is a permanent memory that is part of PCM. EEPROM cannot be replaced. EEPROM contains program and calibration information that PCM uses to control powertrain. If PCM is replaced, ensure NEW PCM software/calibration is correct and most recent version for vehicle. EEPROM must be programmed when NEW PCM is installed. Program EEPROM using latest software for that specific vehicle.
Was this
answer
helpful?
Yes
No
+1
Sunday, December 14th, 2008 AT 6:58 AM

Please login or register to post a reply.

Recommended Guides