Operation CHARM: Car repair manuals for everyone.
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

PCM Inputs/Outputs

Inputs - Operating Conditions Read
- Air Conditioning ON or OFF
- Engine Coolant Temperature Crankshaft Position
- Exhaust Oxygen Content
- Electronic Ignition
- Manifold Absolute Pressure
- Battery Voltage
- Throttle Position
- Vehicle Speed
- Fuel Pump Voltage
- Power Steering Pressure
- Intake Air Temperature
- Mass Air Flow
- Engine Knock
- Camshaft Position

Outputs - Systems Controlled
- EVAP Canister Purge
- Exhaust Gas Recirculation (EGR)
- Ignition Control
- Fuel Control
- Idle Air Control
- Electric Fuel Pump
- Air Conditioning
- Diagnostics
- Malfunction Indicator Lamp (Service Engine Soon lamp)
- Data Link Connector (DLC)
- Data Output
- Transmission Control Module
- Alternator Gain Control