Mitsubishi 3000GT Service Manual page 426

15-8
INTAKE AND EXHAUST - On-vehicle Service
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TURBOCHARGER WASTE GATE SOLENOID
CHECK (Turbo)
OPERATION CHECK
(1) Connect a hand vacuum pump to the solenoid valve nipple
(A) (see the illustration to the left).
(2) Using a jumper wire, connect between the solenoid valve
terminal and battery terminal.
(3) Connecting and disconnecting the jumper wire at the bat-
tery negative terminal to apply a negative pressure, check
tightness.
Jumper wire
Connected
Disconnected
COIL RESISTANCE CHECK
Measure resistance between solenoid valve terminals.
Standard value: 36-44 Q [at 20°C (SS'F)]
TURBOCHARGER BYPASS VALVE CHECK
(Turbo)
(1) Remove the turbocharger bypass valve.
(2) Connect the hand vacuum pump to the nipple of the
turbocharger bypass valve.
(3) Apply a negative pressure of approx. 400 mmHg (16
air tightness is maintained.
Negative pressure
About 400 mmHg (16 in.Hg)
TSB Revision
(B) nipple
Normal condition
condition
Open
Negative pressure leaks.
Close Negative pressure is held.
Open Negative pressure is held.
Valve operation
It starts opening
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