Chart C-9C Vacuum Actuated EFE System Check

Chart C-9C "Vacuum Actuated EFE System Check":

Vacuum Actuated EFE System Diagram:

CHART C-9C

VACUUM ACTUATED EFE SYSTEM CHECK


Test Description: Numbers below refer to circled numbers on the diagnostic chart.

1. Engine coolant temperature should be below 23 degrees C (73 F).

2. There should be at least 34 kPa (10" Hg) vacuum available to EFE actuator diaphragm.

3. Valve may be seized up. It may free up by using heat valve lubricant. If valve does not free up, it must be replaced.


4. EFE valve should open above 32 degrees C (90 F).

5. Vacuum at actuator on a warm engine indicates a faulty TVS. If no vacuum is present, but actuator doesn't move, actuator and valve should be replaced.


**EMI