Honda Civic manuals

Honda Civic Service Manual: Ignition Timing Inspection (Except K24Z7)

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. DTC - Check

1.

Check for DTCs. If a DTC is present, diagnose and repair the cause before continuing with this inspection.


1. Engine Cover

1.

Remove the engine cover.


1. 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.


2. 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.


3. Ignition Timing - Inspection


1.

Jump the SCS line with the HDS.


2.

Connect the timing light to the No. 1 ignition coil harness.



3.

Aim the light toward the pointer (A) on the cam chain case. Check the ignition timing under a no load condition (headlights, blower fan, rear window defogger, and air conditioner are turned off).


Ignition Timing

8±2 ° BTDC (RED mark (B)) at idle


4.

If the ignition timing differs from the specification, check the camshaft timing. If the camshaft timing is OK, update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the system works properly, and the ECM/PCM was substituted, replace the original ECM/PCM.


5.

Disconnect the HDS and the timing light.


1. Engine Cover

1.

Install the engine cover.


Injector Control Module Removal and Installation (R18A9)
Removal 1. Injector Control Module (Natural Gas Model) 1. Remove the injector control module (A). ...

Ignition Timing Inspection (K24Z7)
Inspection 1. HDS DLC - Connection 1. Connect the HDS to the data link connector (DLC) (A) located un ...

See also:

Honda Civic Owners Manual. Refilling Window Washer Fluid
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