Check for spark from all high voltage ignition wires when the starter is turned on. It is important to check for spark in all cylinders in order to detect problems with the input and output signals of the ignition coil.
Check for spark from all high voltage ignition wires when the starter is turned on.
Measure the resistance of the high voltage ignition wires (30 kOhm). Replace any high voltage ignition wires with a resistance greater than the specified value. Check the signals from the ECM to the ignition coil. An oscilloscope is recommended when checking ECM sparking signals, as many intermittent faults can go unnoticed when using a voltmeter. If the ECM's spark signals are OK, the fault may be in the ignition coil.
Check the operation of the crankshaft position sensor, for which:
- measure the resistance between terminals 1 and 2 of the crankshaft position sensor connector (400-600 ohm) with the connector disconnected;
- measure voltage between terminals 1-3, 2-crankshaft position sensor connector and 1 (crankshaft position sensor connector) - G103 («weight»). In all cases, the voltage should be in the range of 1.3-1.5 V (2.4-2.7V).
Disconnect the ignition coil connector. When turning on the starter, measure the voltage at terminals A and C of the ignition coil connector (0.2-2.0V).
Check continuity of wires between terminals C (ignition coil connector) and A19 (ECM connector), as well as between terminals A (ignition coil connector) and A18 (ECM connector).
Check the power supply to terminal B of the ignition coil (pink wire) through connectors S201 С205 from fuse F7 (15 A) (fuse box) with a control light (probe).