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 (SC3) 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.
• 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 => [ Preliminary Check ] Preliminary Check.
Start diagnosis
- Remove the engine compartment trim.
- Remove the engine cover - 2 -.
- Remove the air filter housing bolts - arrows -.
- Remove the air guide hoses - 1 - and - 6 - from the air filter housing.
- 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).
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 an open circuit or a short circuit to Ground (GND).
- Check the electrical harness connector for damage, corrosion, loose 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.
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, Replacing ] Engine Control Module, Replacing.
- 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 resistance.
Specified value: 1.5 ohms Max.
If the specification was not obtained:
- Check the wiring for an open circuit, a short circuit to each other, Battery (+), or Ground (GND).
- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
- If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring:
- Erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Clearing Diagnostic Trouble Codes.
- Perform a road test to verify repair.
If the DTC does not return:
Repair complete, Generate readiness code. Refer to => [ Readiness Code ] Readiness Code.
- End diagnosis.
If the DTC returns and no malfunction is found in the wiring and voltage supply was OK:
- Replace the Motronic Engine Control Module (ECM) (J623). Refer to => [ Engine Control Module, Replacing ] Engine Control Module, Replacing.
Assembly is performed in the reverse order of the removal, note the following:
Final procedures
After 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 ] Clearing Diagnostic Trouble Codes.
3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] Readiness Code.