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 MANUALSHYUNDAI1994ELANTRA L4-1.8LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMRELAYS AND MODULES - IGNITION SYSTEMIGNITION CONTROL MODULETESTING AND INSPECTION
1994 Hyundai Elantra L4-1.8L
Ignition Control Module: Testing and Inspection
1994 Hyundai Elantra L4-1.8LSECTION Testing and Inspection
NOTE: An analog-type ammeter should be used.
Power transistor for coil No. 1 and No. 4 cylinders
1. Connect the negative (-) terminal of the 1.5V power supply to terminal No. 3 of the power transistor
then check whether there is continuity between terminal No. 5 and terminal No.3 when terminal No. 4 and the positive (+) terminal are connected and disconnected.
NOTE: Connect the negative (-) probe of the ammeter to terminal No. 5.
Power transistor for coil No. 2 and No. 3 cylinders
1. Connect the negative (-) terminal of the 1.5V power supply to terminal No. 3 of the power transistor
then check whether there is continuity between terminal No.1 and terminal No. 3 when terminal No. 2 and the positive (+) terminal are connected and disconnected.
NOTE: Connect the negative (-) probe of the ammeter to terminal No. 1.
If the problem is still evident after checking as described above, replace the power transistor.
Power transistor for coil No. 1 and No. 4 cylinders
1. Connect the negative (-) terminal of the 1.5V power supply to terminal No. 3 of the power transistor
then check whether there is continuity between terminal No. 5 and terminal No.3 when terminal No. 4 and the positive (+) terminal are connected and disconnected.
NOTE: Connect the negative (-) probe of the ammeter to terminal No. 5.
Power transistor for coil No. 2 and No. 3 cylinders
1. Connect the negative (-) terminal of the 1.5V power supply to terminal No. 3 of the power transistor
then check whether there is continuity between terminal No.1 and terminal No. 3 when terminal No. 2 and the positive (+) terminal are connected and disconnected.
NOTE: Connect the negative (-) probe of the ammeter to terminal No. 1.
If the problem is still evident after checking as described above, replace the power transistor.
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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.