Variable Intake Manifold Runner Motor, Checking

Diagnostic Procedures

Variable Intake Manifold Runner Motor, Checking

Special tools, testers and auxiliary items required

• Multimeter.

• Wiring diagram.

Test requirements

• Fuse (SC8) 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.

Procedure

- Remove the rear engine cover - arrows -.





Checking voltage supply

- Disconnect the Variable Intake Manifold Runner Motor (V183) electrical harness connector - 2 -.





Crank the engine.

- Using a Multimeter, check the Variable Intake Manifold Runner Motor (V183) electrical harness connector terminal 1 to 3 for voltage.

Switch the ignition off.

Specified value: battery voltage.

If the specified value was not obtained:

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

- Check the wiring from the Variable Intake Manifold Runner Motor (V183) electrical harness connector terminal 1 to the Motronic Engine Control Module (ECM) Power Supply Relay (J271) socket 2/87 for a short circuit to each other, Battery (+), Ground (GND), or an open circuit.

- Check the wiring from the Variable Intake Manifold Runner Motor (V183) electrical harness connector terminal 3 to the to the Ground (GND) connection on the lower right A-pillar for a short circuit to each other, Battery (+), or an open circuit.

- If necessary, repair the faulty wiring connection.

If the specified value was obtained:

Checking wiring

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

- Install the test box. Refer to Repair Information.

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

- Remove the Engine Control Module (ECM) (J623). Refer to Repair Information.

- Using a multimeter, check the Variable Intake Manifold Runner Motor (V183) electrical harness connector terminal 2 to the Engine Control Module (ECM) (J623) electrical harness connector T60a terminal 6 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 (+), Ground (GND), or an open circuit.

- 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:

- Replace the Engine Control Module (ECM) (J623). Refer to Repair Information.

The Variable Intake Manifold Runner Motor (V183) must be adapted to the Engine Control Module (ECM) (J623).

To adapt the Variable Intake Manifold Runner Motor (V183) to the Engine Control Module (ECM) (J623) perform the following steps:

Test requirements

• The battery voltage at least 12.5 V.

• Coolant temperature must be between 20° C and 80° C.

• No DTC's stored in DTC memory.

- Start the engine and let run at idle for at least 70 seconds.

- The Engine Control Module (ECM) (J623) will automatically adept the Variable Intake Manifold Runner Motor (V183).

- Assembly is performed in the reverse order of removal.

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 Modes 01 - 09.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Modes 01 - 09.

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

- End of diagnosis.