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 MANUALSHONDA1994DEL SOL L4-1.5L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMRELAYS AND MODULES - IGNITION SYSTEMIGNITION CONTROL MODULETESTING AND INSPECTION
1994 Honda Del Sol L4-1.5L SOHC
Ignition Control Module: Testing and Inspection
1994 Honda Del Sol L4-1.5L SOHCSECTION Testing and Inspection
NOTE: Perform an input test for the Ignition Control Module (ICM) only after finishing the fundamental tests for the ignition system and the fuel and emissions system.
HINT: For a quick test of ICM operation, verify that the tachometer operates normally.
1. Remove the distributor cap, the distributor rotor, and the inner cover.
2. Disconnect the BLK/YEL, WHT/BLU, YEL/GRN, and BLU wires from the ICM.
3. Turn the ignition switch ON. Check for voltage between the BLK/YEL wire and chassis ground. There should be battery voltage.
- If there is no battery voltage, check the BLK/YEL wire between the Ignition Switch and the ICM.
- If there is battery voltage, go to step 4.
4. Turn the ignition switch ON. Check for voltage between the WHT/BLU wire and chassis ground. There should be battery voltage.
- If there is no battery voltage, check the Ignition coil and
WHT/BLU wire between the ignition coil and the ICM.
- If there is battery voltage, go to step 5.
5. Check the YEL/GRN wire between the Engine Control Module (ECM) and the ICM.
6. Check the BLU wire between the tachometer and the ICM.
7. If all tests are normal, replace the ICM.
HINT: For a quick test of ICM operation, verify that the tachometer operates normally.
1. Remove the distributor cap, the distributor rotor, and the inner cover.
Ignition Control Module:
2. Disconnect the BLK/YEL, WHT/BLU, YEL/GRN, and BLU wires from the ICM.
3. Turn the ignition switch ON. Check for voltage between the BLK/YEL wire and chassis ground. There should be battery voltage.
- If there is no battery voltage, check the BLK/YEL wire between the Ignition Switch and the ICM.
- If there is battery voltage, go to step 4.
4. Turn the ignition switch ON. Check for voltage between the WHT/BLU wire and chassis ground. There should be battery voltage.
- If there is no battery voltage, check the Ignition coil and
WHT/BLU wire between the ignition coil and the ICM.
- If there is battery voltage, go to step 5.
5. Check the YEL/GRN wire between the Engine Control Module (ECM) and the ICM.
6. Check the BLU wire between the tachometer and the ICM.
7. If all tests are normal, replace the ICM.
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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.