Attention! Due to the very high voltage generated in the ignition system, the maintenance of its components must be carried out with extreme care. This notice applies not only to the main components of the electronic ignition system, but also to all related components, including ignition coil tips, tachometer and other diagnostic equipment.
1. Remove ignition coils (with switch) with spark plugs.
2. Remove the spark plugs.
3. Install the spark plugs into the ignition coils and connect the ignition coil electrical connector.
4. Disconnect electrical connectors from all fuel injectors.
5. Ground the spark plugs.
6. Crank the engine and check for spark plugs (refer to accompanying illustration).
Note. In order not to flood the engine with gasoline, crank the engine for no more than 5-10 seconds at a time.
7. If there is no spark, check the power supply to the ignition coil:
- a. Do not disconnect the battery while the engine is running;
- b. Turn on the ignition;
- c. Make sure there is voltage on the output () coils;
- d. If there is voltage, check the CKP and CMP sensors.
8. While cranking the engine, check for bright blue sparks between the spark plug electrodes.
Note. When performing this check, to prevent fuel injection, crank the engine no more than 1-2 seconds per stroke.
9. If there is no spark, do the following:
- a. Do not disconnect the battery while the engine is running;
- b. Check the condition of the contacts in the ignition coil wiring connectors. If the contacts are in order, follow on;
- c. Check the supply voltage to the coil and switch. Turn on the ignition. Check for battery voltage at the positive terminal of the coil. If there is no voltage, check the wiring between the ignition switch and the switch coil. If the wiring is OK, proceed further.
- d. Check the resistance of the ignition coils. If the resistances are not as specified, replace the coil. If the resistance is OK, proceed further;
- e. Check the resistance of the CMP sensor. If the resistance is incorrect, replace the sensor, if correct, continue testing;
- f. Check the resistance of the CKP sensor. If the resistance is incorrect, replace the sensor, if correct, continue testing;
- g. If there is still no spark, check the wiring between the ECU and the switch. If the wiring is OK, replace the switch.