Test Description
WARNING: This page is about a different variant/trim than selected.
The number below refer to the step number on the diagnostic table.
- 5:
This step is to confirm that the valve inside the housing is moving correctly and is not loose or damaged in any way.
Intake Manifold Runner Control System Diagnosis
| Step |
Action |
Values |
Yes |
No |
| 1 |
Did you perform the Diagnostic System Check-Engine Controls? |
- |
Go to Step 2 |
Go to Diagnostic System Check - Engine Controls |
| 2 |
Are any other DTCs set? |
- |
Go to Diagnostic Trouble Code (DTC) List |
Go to Step 3 |
| 3 |
Visually inspect the system for the following conditions and repair as necessary:
- Inspect for any disconnected or damaged vacuum hoses and components. Refer to Emission Hose Routing Diagram
.
- Inspect the linkage between the vacuum actuators and the valves. Move the linkage by hand. Check for binding, or interference with the hoses, the wiring, or any other components.
Did you find and correct the condition? |
- |
Go to Step 13 |
Go to Step 4 |
| 4 |
- Start the engine.
- Observe the vacuum actuator linkages for the intake manifold runner control (IMRC) valve and the intake manifold tuning (IMT) valve.
- Command each solenoid ON and OFF with a scan tool.
Do both valves operate? |
- |
Go to Step 5 |
Go to Step 6 |
| 5 |
- Turn OFF the ignition.
- Remove the duct between the IMT valve and the throttle body.
- Move the actuator linkage at the rear of the intake plenum by hand and listen for confirmation that the divider is moving freely in the plenum. If a problem is suspected with the valve, refer to Intake Plenum Switchover Valve Replacement
for further inspection.
- Look down the passages in the IMT valve in order to view the moveable divider between the two sides of the intake air duct.
- Move the actuator linkage by hand. Then ensure that the divider moves with the linkage.
Do both valves operate properly? |
- |
System OK |
Go to Step 12 |
| 6 |
- Turn OFF the ignition.
- Disconnect the vacuum supply hose at each of the actuators.
- Start and idle the engine.
- Test for vacuum at each of the actuators.
Is vacuum present at either actuator? |
- |
Go to Step 11 |
Go to Step 7 |
| 7 |
- Command the IMRC valve solenoid and the IMT valve solenoid ON with a scan tool.
- Measure the vacuum at each of the actuators while the respective solenoid is commanded ON.
Is the vacuum above the specified value? |
33 kPa (10 in Hg) |
Go to Step 12 |
Go to Step 8 |
| 8 |
- Turn OFF the ignition.
- Disconnect the vacuum supply hose from the solenoid that did not have vacuum at the actuator.
- Start and idle the engine.
- Measure the vacuum at the supply hose.
Is the vacuum above the specified value? |
33 kPa (10 in Hg) |
Go to Step 9 |
Go to Step 10 |
| 9 |
- Turn OFF the ignition.
- Inspect the vacuum hose from the solenoid to the actuator for a leak or a restriction.
- Repair or replace the hose as necessary.
Did you find and correct the condition? |
- |
Go to Step 13 |
Go to Step 11 |
| 10 |
Repair the leak or restriction in one of the following components of the vacuum supply system:
- Vacuum hose from the reservoir to the solenoids
- Reservoir
- Vacuum hose from the intake manifold to the reservoir
Did you complete the repair? |
- |
Go to Step 13 |
- |
| 11 |
Replace the affected solenoid. Refer to Intake Plenum Switchover Solenoid Replacement
or Intake Resonance Switchover Solenoid Replacement
.
Did you complete the replacement? |
- |
Go to Step 13 |
- |
| 12 |
Replace the affected valve actuator assembly. Refer to Intake Plenum Switchover Valve Replacement
or Intake Resonance Switchover Valve Replacement
.
Did you complete the replacement? |
- |
Go to Step 13 |
- |
| 13 |
- Start the engine.
- Observe the vacuum actuator linkages for the IMRC valve and the IMT valve.
- Command each valve ON and OFF with a scan tool.
Do both valves operate? |
- |
System OK |
Go to Step 2 |