Check the functioning of the ignition system

In view of the fact that the ignition system produces a very high voltage, maintenance of components should be done with extreme caution. This observation applies not only to the major components of electronic ignition systems, but also to all related components, including the tips of candle wires, tachometer and other diagnostic equipment.

Do not immediately attribute the cause of failure when starting the engine failure operation of the ignition system. First check the following:

a) Check the condition of the battery cables and terminals are secure them to the pole terminals;
b) Check the condition of the battery (see. Section Checking and replacing the battery), if necessary, replace it with a known good;
c) to visually assess the state of the pin connectors of the distributor and ignition coil (models up to 1995 vol.);
d) Check the condition of fuse-links in accordance with established in-car mounting fuse box (see chap. Onboard electric equipment). In case of a "breakdown" Check and correct the cause of the overload.

1. If the engine turns over but will not start, disconnect the spark explosive wires and connect them to a special calibrated tester of ignition (ask in shops of automobile accessories). Connect the pin clamp meter to a bolt or a metal arm on the block of the power unit, then turn the engine - between the electrode and the tester should slip well distinguishable spark bright blue (low intensity spark should be seen as a lack of it).

2. If a spark occurs regularly, therefore, the appropriate spark plug is supplied explosives required voltage. Repeat the test for the remaining candle wires, make sure the cover is in good condition and runner distributor. The next stage of testing will be to determine the actual condition of the spark plugs - Remove them from the cylinder head and refer to the appropriate section in the material Options and routine maintenance.
3. In the absence of sparks or excessively weak intensity, check the distributor cap and the slider, and the wires connecting explosives for signs of oxidation and mechanical damage (see chap. Adjustment and routine maintenance). In the case of traces of moisture, wipe the ignition system components and recheck.
4. If no violations during the inspection of the distributor and wiring can not be identified, disconnect the central IV line (from the coil) from the cover of the distributor of ignition and connect it to the universal meter (spark plug wires should be connected to the spark plugs), and then recheck. If at this time there is a spark, replace the cover and the runner distributor (also not ruled out the likelihood of damage to the wiring of explosives).
5. If the spark is still there, remove the explosives wire from the coil to the distributor and check the condition of its contact terminals. Using an ohmmeter, check the cord for signs of breakage. It would be wise for the duration of further verification replace the wire with a known good.

6. If the replacement wire does not restore the health of sparking, check the energizing the coil from the ignition switch when the key is turned to ON (do not start the engine). Plug a lamp-sampler on 12 to the negative battery terminal or securely earthed element on the engine block. Disconnect the electrical wiring from the coil and check the battery voltage at terminal white and green wire connector. If no voltage, check the wiring on the circuit between the coil and the ignition switch. For more information on the colors of the wires, see chap. Onboard electric equipment.

7. If the power is properly supplied to the coil, connect the lamp-sampler on the LED to the positive terminal of the battery. Contact with the probe, connect the terminal lamp light green wire connector wiring coil, then turn the engine starter, - the lamp should blink while cranking the engine. This test allows you to verify the serviceability of receipt of the trigger signal (signal ground) of the RSM and the power transistor. If the trigger signal occurs, thus PCM, the camshaft position sensor and the power transistor functioning properly.

To reduce the risk of failure of the PCM is used during this test only the lamp-sampler on the LED!

8. If any appearance of a violation supply trigger signal check the status of an RC build and the power transistor (see. Section Check and replacement of the power transistor (models 1993 and 1994 vol.)). An RC connector assembly is attached with tape to the wiring harness on the left directly from the distributor of ignition. If the transistor and the resistor in the order, proceed to checking the camshaft position sensor (see chap. Engine management).

9. When you receive a proper power supply and the trigger signal no sparking can be explained by internal malfunctions in the ignition coil, - a measurement of resistance of its primary and secondary windings (see. Section Check and replace the ignition coils). Where an indication of continuity, replace the coil.
10. If the checks carried out confirm serviceability of functioning and status of all the above components, the car should be driven away on a car repair shop for diagnostics PCM.

1. If the engine turns over but will not start, you must make sure of serviceability of giving a battery voltage to the spark plugs. Remove the spool (see. Section Check and replace the ignition coils), and connect a calibrated tester of ignition candle to tip (do not forget to connect the wiring to the coil), ground tester to ground power unit. Crank the engine, - the tester between the electrode and the body should slip a bright blue spark of good intensity.

2. If a spark occurs regularly, therefore, the appropriate spark plug is supplied explosives required voltage (acting in a similar manner, serially check each of the candles). The next stage of testing will be to determine the actual condition of the spark plugs - Remove them from the cylinder head and refer to the appropriate section in the material Options and routine maintenance.

3. In the absence of sparks or excessively weak intensity, remove the spark plug tip and check the condition of its contact terminals. Using an ohmmeter, check for signs of tip breakage. Make sure of serviceability of giving a battery voltage to the coil of the ignition switch (key in position ON, the engine is not running). Plug a lamp-sampler on 12 to the negative terminal of the battery, or weight of the engine and make sure in good supply to terminal number 1 coil connector (red wire). If the battery voltage is missing, check the condition of the wiring between the coil relay ECCS and the ignition switch. Also check if the ground (see chap. Onboard electric equipment).

4. If the battery voltage to the coil takes place, connect the lamp-sampler on the LED to the positive terminal of the battery and try number 3 terminal connector - while cranking the engine light should be flashing. This test allows you to verify the serviceability of receipt of the trigger signal (signal ground) of the RSM and the power transistor. If the trigger signal occurs, thus PCM encoders and shaft functioning properly.

To reduce the risk of failure of the PCM is used during this test only the lamp-sampler on the LED!

5. If any appearance of a violation supply trigger signal Check the condition of the capacitive assembly. Capacitive connector assembly is attached to the wiring harness tape directly on the transmission housing. If the capacitor in order, proceed to check the crankshaft position sensor and camshaft (see chap. Engine management).

6. When you receive a proper power supply and the trigger signal no sparking can be explained by internal malfunctions in the ignition coil (see. Section Check and replace the ignition coils). In the event of signs of malfunction replace the coil.
7. If the checks carried out confirm serviceability of functioning and status of all the above components, the car should be driven away on a car repair shop for diagnostics PCM.