Control unit junction block contact numbers
Execution order
1. Disconnect the high-voltage central wire from the ignition distributor and connect it to ground.
2. Disconnect the connector block.
3. Connect the voltmeter to the extreme contacts "1" and "3", turn on the ignition. The voltmeter should show a voltage of about 9 V. Otherwise, check the wiring.
4. Slide the protective cover back from the socket, connect the voltmeter to contacts "1" and "2" and install the socket into the socket on the ignition distributor.
5. Remove the distributor cap, rotor and dust shield.
6. Turn the engine crankshaft so that the anchor teeth (1) of the distributor do not cover the Hall sensor (2). Turn on the ignition. The voltage should be 4 V.
7. Turn the crankshaft so that one of the anchor teeth aligns with the Hall sensor. The voltage should drop to 0–0.5 V. Turn off the ignition. If the voltage differs from the specified value, replace the Hall sensor.
8. Connect the ohmmeter to contacts "1" and "4", then to contacts "2" and "27", and finally to "3" and "25". In all cases, the resistance should be zero. If the resistance differs from zero, there is a break in the wiring.