Contents: Examination ⇊ Replacement ⇊
Examination
1. Check for proper power supply to the ignition module. Remove the distributor cap and rotor and disconnect the black/yellow wire from the ICM (see accompanying illustration). Check for battery voltage directly at the wiring connector with the ignition on (key in ON position, engine not running).
2. Check the condition of the ignition circuit and related components. If there is no voltage at the ICM, check the condition of the wiring in the circuit section between the module and the battery (see Chapter On-board electrical equipment). First of all, you should always check the condition of the ignition switch fuses No.41 (80A on Civic models and 100A on Integra models) and 42 (40 A) in the relay / fuse assembly unit located under the hood. Also check fuse No.9 (15 A) in the mounting block inside the vehicle interior. Carefully examine the electrical circuit and make sure that the ignition switch provides power to the ICM when the key is turned to the ON position. Also check the yellow-green wire between the ICM and the Power management module (PCM) and the blue wire connected to the tachometer or its service connector. If there is no conductivity between the ends of any of the mentioned wires, then there is a breakage and the corresponding electrical wiring must be replaced. If there is a conductivity between one of the ends of the wire and the ground, then there is a short circuit (for more information, see the electrical connection diagrams in the Chapter On-board electrical equipment).
3. Make sure that the power supply from the ignition coil to the ICM is correct. With the ignition on (do not start the engine) make sure there is voltage between the blue (hitachi distributor)/white and blue (tES distributor) and body weight (see accompanying illustration). The voltage should be equal to that produced by the battery.
4. If there is no voltage, check the circuit between the corresponding wire and the coil. Also check the coil windings for internal breaks (see Checking the condition and replacing the ignition coil).
5. If the coil and circuit wiring are OK and there is no spark, replace the ICM.
Replacement
1. Disconnect the negative cable from the battery.
Warning! If the car stereo system is equipped with a security code, make sure you have the correct combination to activate the audio system before disconnecting the battery!
2. Remove the cover and, if equipped, the distributor protective screen (see Chapter Routine maintenance).
3. Disconnect all electrical connectors on the ICM.
4. Remove the mounting screw and remove the ICM from the distributor (see accompanying illustration).
5. Installation is carried out in reverse order