Special Tools
• | EN-46999 Active Fuel Management Tester |
• | EN-46999-1 Active Fuel Management Tester Air Adapter |
• |
EN-46999-5 Active Fuel Management Tester Harness - Small Block V8 |
For equivalent regional tools, refer to
Special Tools
Note:
• | This component test applies only to vehicles with functional active fuel management. |
• | A minimum shop air source of 206 kPa (30 psi) is required for manifold testing. |
• | A water bleed is located on the
EN-46999 tester
. Occasionally, depress the valve in order to remove excess water from the tool. |
The manifold bench test provides a maximum 206 kPa (30 psi) of filtered shop air to the manifold and will test each solenoid/valve for the following conditions:
• | A stuck open condition - constant air flow |
• | A stuck closed condition - no air flow |
• | A flow restriction within the manifold |
- Individually depress each of the buttons 1-4 on the
EN-46999 tester
in order to activate each of the solenoid/valves. When activating each solenoid/valve, a loud click
should be heard from the solenoid and an increased amount of air will exit the outlet ports.
• | Button 1 will energize the solenoid/valve 1 for engine cylinder number 1. |
• | Button 2 will energize the solenoid/valve 2 for engine cylinder number 4. |
• | Button 3 will energize the solenoid/valve 3 for engine cylinder number 6. |
• | Button 4 will energize the solenoid/valve 4 for engine cylinder number 7. |
- Do not lift the manifold assembly by
the electrical lead frame.
- Install the
EN-46999-1 adapter
(1) to the manifold.
Caution: Refer to Fastener Caution in the Preface section.
- Install 2 of the manifold bolts (2) to the
EN-46999-1 adapter
and tighten to
25 N·m (18 lb ft).
- Connect the air out hose (2) of the
EN-46999 tester
(5) to the
EN-46999-1 adapter
(1). Verify the air supply switch (4) is in the off position.
- Connect the air in hose (6) of the
EN-46999 tester
(5) to a shop air source.
- Connect the 12-volt power supply connectors (7) of the
EN-46999 tester
(5) to a 12-volt power supply. Verify the Power light (8) on the tool is
illuminated. If the light on the tool is not illuminated when connected to a 12-volt power supply, test and/or replace the 3 amp fuse.
- Connect the
EN-46999-5 harness
power cable (3) to the electrical connector of the manifold.
- Turn the air supply switch of the
EN-46999 tester
to the ON position. With the air supply connected to the manifold assembly and the solenoid/valves in the closed position, a limited amount of air will exit each of the bleed holes (3) and
outlet ports (1, 2) of the manifold.
Note: The manifold must be tested in the proper position to ensure the solenoid/valves operate as designed.
- Position the manifold assembly onto a bench at a 45 degree angle in order to test solenoid/valves 1 and 4.
- Depress button number 1 on the tool to activate solenoid/valve 1. With button 1 depressed, the solenoid/valve (1) should open, allowing an increased amount of air to exit the outlet ports (2) of the manifold.
- Depress button number 4 on the tool to activate solenoid/valve 4. With button 4 depressed, the solenoid/valve (4) should open, allowing an increased amount of air to exit the outlet ports (3) of the manifold.
- Reposition the manifold assembly onto a bench at a 45 degree angle in order
to test solenoid/valves 2 and 3.
- Depress button number 2 on the tool to activate solenoid/valve 2. With button 2 depressed, the solenoid/valve (2) should open, allowing an increased amount of air to exit the outlet ports (4) of the manifold.
- Depress button number 3 on the tool to activate solenoid/valve 3. With button 3 depressed, the solenoid/valve (3) should open, allowing an increased amount of air to exit the outlet ports (1) of the manifold.
- When the test is completed, turn the air source switch on the
EN-46999 tester
to the off position and disconnect the tool from the 12-volt power supply, shop air source and
manifold assembly.
- If after testing, it has been determined that 1 or more of the solenoid/valves is not functioning properly, replace the manifold as an assembly.
- If after testing, it has been determined that the solenoid/valves are functioning properly, replace the valve lifters, as required. Both intake and exhaust lifters should be replaced in pairs.