
INTAKE AND EXHAUST
Service Adiustment Procedures
SUPERCHARGING PRESSURE RELIEF SOLENOID
VALVE INSPECTION (Turbo)
OPERATION INSPECTION
Connect a hand vacuum pump to the solenoid valve nipple
(see the illustration to the left).
Using a jumper wire, connect between the solenoid valve
terminal and battery terminal.
Connecting and disconnecting the jumper wire at the
battery negative terminal to apply a negative pressure,
check tightness.
Jumper wire
nipple
Normal condition
condition
Connected
Disconnected
Open
Negative pressure leaks.
Close
Negative pressure is held.
Open
Negative pressure is held.
COIL RESISTANCE INSPECTION
Measure resistance between solenoid valve terminals
Standard value: 36 44 [at
AIR BYPASS VALVE INSPECTION (Turbo)
(1) Remove the air bypass valve.
(2) Connect the hand vacuum pump to the nipple of the air
bypass valve.
(3) Apply a negative pressure of approx. 400
(16
and check operation of the valve. Also check that air
tightness is maintained.
Negative pressure
About 400
(16
Valve operation
It starts opening
INTAKE MANIFOLD VACUUM INSPECTION
Refer to GROUP 11 Service Adjustment Procedures.
TSB Revision
Summary of Contents for 3000GT 1991
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