Q: How do you check and replace the ignition control module (ICM) on Honda Del Sol?
A: Before testing this unit, disconnect the distributor cap alongside the ICM cover, and withdraw the wires from the ICM unit. To do this, turn the ignition ON (do not start the engine) and connect the voltmeter between black yellow small terminal of ICM unit and body ground; there must be battery voltage. If no voltage is found, check with a continuity tester the circuit between the black/yellow wire and the IGN switch. Then, enter into all BRN/BLK, and then measure voltage between white/blue wire and body ground there should be battery voltage. If missing, check the circuit between the wire related to the above and Ignition Coil. Also check the connection between the white/blue wire and the blue wire that is present with the offset terminal of the ICM it should of 1.1 to 3.3 K-ohms. If the ICM fails these checks, the ICM has to be replaced, and while installing the new ICM, sliding the connector into the housing, apply silicone grease. As to replacement, one begins with the removal of the negative battery terminal followed by distributor cap and cap cover, and then gets disconnecting all electrical connections of the ICM unit. Take out the two set screws at the ICM body and slide out the ICM unit along the axis of the rails. Removal is the process of 'un-installing,' and installation is the opposite of it.