Checking the solenoid valve
1. Remove the solenoid valve.
2. Using an ohmmeter, make sure that there is no break in the valve winding circuit by measuring its electrical resistance.
- Nominal resistance (at 20°C) - 33-39 Ohm
Otherwise, replace the valve.
3. Check the valve operation:
a) Make sure air passes through the valve.
b) Apply voltage from the battery to the terminals of the valve connector.
c) Make sure that no air passes through the valve.
If the valve does not work properly, replace the valve.
4. Reinstall the valve.
[The text is taken from the specified website TOYOTAMAN]