Remove the oil control valve.
Fig. 2.118. Primary check of the position of the spool valve of the control oil valve: 1 – spool valve
Check the position of the spool valve of the control oil valve. It should be in the position of maximum delay in the opening or closing of the engine valves, as shown in Figure 2.118.
If the measurement result is different from the standard ohmmeter reading characteristic, replace the oil control valve.
Make sure the battery is fully charged. If not, charge the battery.
Apply battery voltage to the terminals of the oil control valve and check that the spool valve operates and moves to the maximum advance position of opening or closing the engine valves. If the measurement result differs from the standard characteristic of the ohmmeter readings, replace the oil control valve.
Note: Options for supplying battery voltage to the terminals of the control oil valve:
- - Plus battery - to terminal A, minus - to terminal B
- - Plus battery - to terminal B, minus - to terminal A
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Fig. 2.119. Secondary check of the position of the spool valve of the control oil valve: 1 – valve opening and closing advance; 2 – delay in opening and closing of valves; 3 – spool valve
Disconnect the battery and check that the spool valve has returned to the maximum engine valve retardation position. If not, replace the oil control valve (fig. 2.119).