Operation CHARM: Car repair manuals for everyone.
Home >> Chevrolet >> 2000 >> C 1500 Truck 2WD V6-4.3L VIN W >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data, Normal Values and Definitions >> Scan Tool Data Definitions - Powertrain Systems >> Loop Status
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

Loop Status

(Open Loop/Close Loop):
The loop status indicates when the VCM is controlling fuel delivery which is calculated using the HO2S bank 1 and 2 inputs. This is called Closed Loop fuel control. During Open Loop, the VCM ignores the HO2S input and bases fuel delivery upon Throttle Position (TP), engine coolant, and Mass Air Flow (MAF) sensor input.
pro multis · About Operation CHARM