Control unit junction block contact numbers
Execution order
1. Disconnect the gray pads.
2. Use an ohmmeter to measure the resistance between contacts "1" and "2", it should be approximately 1 kOhm. If the resistance differs from the specified value, the sensor must be replaced.
3. After this, measure the resistance between contacts "1" and "3", then between contacts "2" and "3". In both cases, the ohmmeter should show zero. If there is any resistance, replace the frequency sensor.
4. Check the wiring between the frequency sensor block and the ignition control unit block. To do this, disconnect the connecting block from the block.
5. Use an ohmmeter to measure the resistance between contacts "1" and "29", then between "2" and "11", and finally between "3" and "28" (see Fig. Control unit junction block contact numbers.
6. In all cases, the resistance should be zero. If the ohmmeter shows any resistance, then there is a break in the wiring.