Intake Manifold Runner Control Valve, Checking

Intake Manifold Runner Control Valve, Checking

Special tools, testers and auxiliary items required

• Multimeter.

• Wiring diagram.

Test requirements

• Fuse (S282) OK.

• The Engine Component Power Supply Relay (J757) OK.

• The parking brake engaged.

• The battery voltage at least 12.5 V.

• The selector lever of automatic transmission in position "P" or " N".

• All electrical consumers switched off (radiator fan must NOT run during test).

• A/C switched off.

• The fuel tank at least 1/4 filled.

• The ignition switched off.

Test procedure

- Perform a preliminary check to verify the customers complaint. Refer to => [ General Diagnosis ] General Diagnosis.

Start diagnosis

- Remove the rear engine cover - arrows -.





- Disconnect the Intake Manifold Runner Control (IMRC) Valve (N316) electrical harness connector - 2 -.





Checking internal resistance

- Using a Multimeter, check the Intake Manifold Runner Control (IMRC) Valve (N316) terminals 1 to 2 for resistance





Specified value: 450 to 1000 ohms.

If the specified value was not obtained:

- Replace the Intake Manifold Runner Control (IMRC) Valve (N316). Refer to Fuel Injection and Ignition Repair Information.

If the specified value was obtained:

Checking voltage

Crank the engine.

- Using a Multimeter, check the Intake Manifold Runner Control (IMRC) Valve (N316) electrical harness connector terminal 1 to ground (GND) for voltage.





Specified value: battery voltage.

- Switch the ignition off.

If the specified value was not obtained:

- Check the wiring from the Intake Manifold Runner Control (IMRC) Valve (N316) electrical harness connector terminal 1 to the Engine Component Power Supply Relay (J757) terminal 2/87 for a short circuit to Ground (GND), or an open circuit.

- Check the electrical harness connector for damage, corrosion, lose or broken terminals.

- If necessary, repair the wiring connection.

If no malfunctions are found in the wiring:

Checking wiring

If the manufacturers test box is being used. Perform the following step.

- Install the test box. Refer to Fuel Injection and Ignition Repair Information.

If the manufacturers test box is not being used. Perform the following step.

- Remove the Motronic Engine Control Module (ECM) ( J623). Refer to => [ Engine Control Module 1, Removing and Installing ] Engine Control Module 1, Removing and Installing.

- Using a multimeter, check the Intake Manifold Runner Control (IMRC) Valve (N316) electrical harness connector terminal 2 to the Engine Control Module (ECM) (J623) electrical harness connector T60 terminal 35 for an open circuit.





Specified value: 1.5 ohms Max.

If the specification was not obtained:

- Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).

- Check the electrical harness connector for damage, corrosion, lose or broken terminals.

- If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring:

- Replace the Motronic Engine Control Module (ECM) (J623). Refer to => [ Engine Control Module 1, Removing and Installing ] Engine Control Module 1, Removing and Installing.

- Install the rear engine cover - arrows -.





Final procedures

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] Diagnostic Mode 03 - Read DTC Memory.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Mode 04 - Erase DTC Memory.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.

- End of diagnosis.