REPAIR INSTRUCTIONS, PART 2
Page 437
535
Figure 535 — Install Air Pressure Gauge in Air Line
3. Turn the ignition key switch ON, then note
the reading indicated on the pressure
gauge. If a reading of 95 psi is not obtained
with system pressure at 110 psi, apply
clean, dry, regulated shop air to the actuator
as follows:
a. Disconnect the air line at the 90-degree
fitting located at the top of the actuator.
b. Connect a regulated shop air supply
and pressure gauge to the 90-degree
fitting.
c. Apply 100 psi pressure to the actuator
and observe the actuator rod travel.
4. If full stop-to-stop rod travel occurs with
100 psi shop air applied to the actuator,
verify that coolant temperature was at 140°F
(60°C) and air system pressure was at 110
psi when the first test was performed. Also,
check the harness connectors to ensure
good connections. If no faults are found,
replace the VTG control valve with a known
good valve and rerun the VTG calibration.
5-111.bk Page 437 Monday, July 10, 2006 2:26 PM
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