Intake Manifold Runner Position Sensor, Checking

Observe all safety precautions: SAFETY PRECAUTIONS 

View clean working conditions: CLEAN WORKING CONDITIONS 

Use only gold-plated terminals when servicing any component with gold-plated electrical harness connector terminals.

For wiring diagrams, component locations, and connector views, Refer to the applicable SYSTEM WIRING diagram.

Special Tools And Workshop Equipment Required 

• Multimeter
• Wiring diagram

Test Requirements 

• The Motronic Engine Control Module (ECM) - J623- fuses OK.
• Battery voltage at least 12.5 volts.
• All electrical consumers such as, lights and rear window defroster, switched off.
• Vehicles with automatic transmission, shift selector lever into position "P" or "N".
• A/C switched off.
• Ground (GND) connections between engine/transmission/chassis OK.
• Ignition switched off.

Test Procedure 

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK 

Start diagnosis 

-- Remove the engine cover with air filter. Refer to appropriate service information.

-- Disconnect theIntake Manifold Runner Position Sensor -G336- electrical harness connector -arrow-.

-- Switch the ignition on.

-- Using a multimeter, check the Intake Manifold Runner Position Sensor -G336- Electrical Harness Connector Terminals 1 to 3 for voltage.

Specified Value: about 5 V 

-- Switch ignition off.

If the specified value was not obtained:

-- Check and/or repair wiring as required.

If the specified value was obtained:

Checking internal resistance

-- Using a multimeter, check the Intake Manifold Runner Position Sensor -G336- electrical terminals 2 to 3 for resistance.

Specified Value: 7-25 Ω  (at approx. 20° C)

-- Using a multimeter, check the Intake Manifold Runner Position Sensor -G336- electrical terminals 1 to 3 for resistance.

Specified Value: 244 [+/- 40] Ω   (at approx. 20° C)

If the specified values were not obtained:

-- Replace theIntake Manifold Runner Position Sensor -G336-. Refer to appropriate service information.

If the specified value was obtained:

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 appropriate service information.

-- Using a multimeter, check the Intake Manifold Runner Position Sensor -G336- Electrical Harness Connector Terminals to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T60 terminals for an open circuit.

Intake Manifold Runner Position Sensor -G336- Electrical Harness Connector Terminals	Motronic Engine Control Module (ECM) -J623- Electrical Connector T60 Terminals Or Test Box Socket
1	27
2	43
3	13

Specified Value: 1.5 Ω Max. 

If the specification was not obtained:

-- Check the wiring for a short circuit to Battery (+), 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 Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information.

-- Install the engine cover with air filter. Refer to appropriate service information.

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 .
2. If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
3. If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .