Operation CHARM: Car repair manuals for everyone.
Home >> Honda >> 2012 >> Civic L4-1.8L >> Repair and Diagnosis >> Powertrain Management >> Tune-up and Engine Performance Checks >> Idle Speed >> Testing and Inspection
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

Idle Speed: Testing and Inspection






Idle Speed Inspection

Inspection

1. HDS DLC - Connection





1. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.

2. Turn the ignition switch to ON (II).

3. Make sure the HDS communicates with the vehicle. If it does not communicate, go to the DLC circuit troubleshooting.

2. Warm Up The Engine

Start the engine. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.

3. Idle Speed - Inspection

1. Check the idle speed without electrical load: headlights, blower fan, radiator fan, and air conditioner off.

Idle speed should be:

USA and Canada models: 720±50 rpm (A/T in P or N, M/T in neutral)

Mexico models: 710±50 rpm (A/T in P or N, M/T in neutral)

2. Let the engine idle for 1 minute with high electric load (A/C switch on, temperature set to max cool, blower fan on High, and headlights on high beam).

Idle speed should be:

USA and Canada models: 720±50 rpm (A/T in P or N, M/T in neutral)

Mexico models: 710±50 rpm (A/T in P or N, M/T in neutral)

NOTE: If the idle speed is not within specification, do the ECM/PCM idle learn procedure. If the idle speed is still not within specification, go to symptom troubleshooting.
pro multis · About Operation CHARM