Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSHONDA1993ACCORD L4-2156CC 2.2L SOHCREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULETESTING AND INSPECTION
1993 Honda Accord L4-2156cc 2.2L SOHC
Engine Control Module: Testing and Inspection
1993 Honda Accord L4-2156cc 2.2L SOHCSECTION Testing and Inspection
Test Harness Installation:
If the inspection for a particular failure code requires the ECM test harness, remove the right door sill molding, the small cover on the right kick panel, and pull the carpet back to expose the ECM.
Unbolt the ECM cover. With the ignition switch off, connect the ECM test harness. Then check the system according to the procedure described for the appropriate code(s) listed.
The purpose of the ECM test harness is to allow circuit testing without having to back-probe the ECM harness. If the ECM test harness is unavailable, CAREFUL back probing of the ECM harness will have to be performed.
How To Properly Probe Electrical Connections:
CAUTION:
^ Puncturing the insulation on a wire can cause poor or intermittent electrical connections.
^ For testing at connectors other than the test harness, bring the tester probe into contact with the terminal from the connector side of wire harness connectors in the engine compartment. For female connectors, just touch lightly with the tester probe and do not insert the probe.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.