CHECK VALVE OPERATION CHECK
1.
Remove the check valve (Refer to
).
2.
caution
Replace the check valve when it is faulty.
Using a vacuum pump, check operation of the check valve.
Vacuum pump connection
Normal condition
When connected to the booster side (1)
Vacuum is generated and maintained.
When connected to the engine side (2)
No vacuum is generated.
Vacuum pump connection
Normal condition
When connected to the booster side (1)
Vacuum is generated and maintained.
When connected to the engine side (2)
No vacuum is generated.