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1.Remove the vacuum hoses
(blue stripe, yellow stripe) from the solenoid
valves.
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2.Disconnect the harness
connectors.
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![](../../../img/26/ACF02541AB00ENG.png)
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3.Connect a hand vacuum pump
to solenoid valve A and carry out the following
inspections. (1)
Even if the hand pump is operated with no other operation,
no negative pressure develops. (2)
Negative pressure does not develop when battery voltage is
applied to solenoid valve
A. Meanwhile, negative pressure is maintained when the
vacuum hose of solenoid valve B is blocked
by bending. (3)
When battery voltage is applied to solenoid valves A and B,
negative pressure is maintained.
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![](../../../img/26/ACF02542AB00ENG.png)
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4.Connect the hand vacuum
pump to solenoid valve B. Apply negative pressure and carry
out
the following inspections. (1)
With no other operation, negative pressure is
maintained. (2)
When battery voltage is applied to solenoid valve B,
negative pressure disappears. (3)
When battery voltage is applied to solenoid valve A,
negative pressure disappears. 5.Measure the
resistance of the solenoid valves. Standard
value: 36 -46 Ω
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