Operation CHARM: Car repair manuals for everyone.
Home >> Honda >> 1994 >> Accord L4-2.2L SOHC VTEC >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics
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

Component Tests and General Diagnostics

WARNING: Do not smoke during this procedure. Keep any open flame away from your work area.

NOTE: (Canadian cars) Pull the parking brake lever up, then check that the headlights remain off when starting the engine.



1. Connect a tachometer.
2. Start the engine. Hold the engine at 3,000 rpm with no load (A/T in N or P position, M/T in neutral) until the radiator fan comes on, then let it idle.
3. Check and adjust the idle speed, if necessary. Refer to Fuel Delivery and Air Induction / Adjustments.
4. Warm up and calibrate the CO meter according to the meter manufacturer's instructions.
5. Check idle CO with the headlights, heater blower, rear window defogger, cooling fan, and air conditioner off.

CO meter should indicate 0.1% maximum.
pro multis · About Operation CHARM