Operation CHARM: Car repair manuals for everyone.
Home >> Chevrolet >> 1998 >> Metro L4-079 1.3L VIN 2 MFI >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Description and Operation >> Common OBD II Systems >> Preliminary Information
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

Preliminary Information

The Chevrolet Metro conforms to all OBD 2 mandated emission regulations. The powertrain control module (PCM) is responsible for monitoring and modifying engine controls in order to meet all OBD 2 requirements. Certain minimum criteria for how the PCM monitors and diagnoses the emission system is specified in the OBD 2 regulations. The following information describes the common operations and terms of the OBD 2 regulations that the Metro PCM is designed to adhere to.
pro multis · About Operation CHARM