Operation CHARM: Car repair manuals for everyone.
Home >> Geo >> 1996 >> Metro L4-079 1.3L VIN 9 TBI >> Repair and Diagnosis >> Powertrain Management >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Service and Repair
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Engine Control Module: Service and Repair

Removing Engine Control Module:






NOTE: Service of the Powertrain Control Module (PCM) consists of complete replacement of the PCM. There are no serviceable parts, such as Programmable Read Only Memory (PROM) or Erasable Programmable Read Only Memory (EPROM) to replace inside the PCM. If the PCM is determined to be faulty, it is to be replaced as a complete assembly.


IMPORTANT: When replacing the production PCM with a service PCM, it is important to transfer the broadcast code and production PCM number to the service PCM label. Please do not record on the PCM cover. This will allow positive identification of the PCM parts throughout the service life of the vehicle.

REMOVE OR DISCONNECT
1. Negative (-) battery cable.
2. Two clips and pull glove box down.
3. Three bolts and PCM bracket from behind glove box.
4. Three PCM electrical connectors and PCM from passenger compartment.

INSTALL OR CONNECT
1. Three PCM electrical connectors.
2. PCM bracket to mounting bracket behind glove box; secure with three bolts. Tighten PCM bracket bolts to 6 Nm (4 lb ft).
3. Two clips and push glove box up.
4. Negative (-) battery cable. Tighten negative (-) battery cable-to-negative (-) battery terminal.


pro multis · About Operation CHARM