4B
TURBOCHARGING SYSTEM
4B-52
TURBOCHARGER BOOST PRESSURE
1. Be sure the engine is cool.
2. Disconnect hose A from the solenoid valve and
connect the SST as shown.
3. Warm up the engine to normal operating tem
perature.
4. Increase the engine speed to 4,000 rpm and
check that the boost pressure is within specification.
Specification:
• Above 0 kPa (0 kg/cm2, 0 psi)
(any positive pressure)
86U04B-043
WASTE GATE
1. Be sure the engine is cool.
2. Remove the exhaust manifold insulator and side
insulator.
3. Remove the hose (connected to actuator) and con
nect the SST as shown.
4. Apply 58.9 kPa (0.6 kg/cm2, 8.5 psi) of com
pressed air.
5. Check that the rod moves when disconnecting and
reconnecting the hose supplying the compressed
air.
Caution
Do not apply compressed air over 98 kPa (1.0
kg/cm2, 14 psi).
AIR BYPASS VALVE
1. Remove the air bypass valve.
2. Connect a vacuum pump to port A of the valve.
3. Apply vacuum and blow from port B.
4. Check that air flows at the specified vacuum.
5. If not correct, replace the air bypass valve.
Vacuum:
250—400 mmHg (9.8—15.7 inHg)
86U04B-045
INTERCOOLER
1. Remove the intercooler.
2. Inspect it for cracks, restriction, or damage.
3. Replace if necessary.
86U04B-046