Intake Manifold Runner Position Sensor 2, Checking

Special tools and workshop equipment required 

• Multimeter.
• Wiring diagram.

Test Requirements 

• Fuses for engine electronics OK.
• Parking brake engaged.
• Battery voltage at least 12.5 V.
• Vehicles with automatic transmission, shift selector lever into position "P" or "N".
• All electrical consumers such as, lights and rear window defroster, switched off (radiator fan must not run during test).
• A/C switched off.
• The fuel tank at least 1/4 full.
• Ignition switched off.

Test Procedure 

-- Perform a preliminary check to verify the customer's complaint. Refer to PRELIMINARY CHECK .

-- Disconnect the electrical harness connector from the Intake Manifold Runner Position Sensor 2 -G512- -1-.

Checking voltage supply

-- Using a Multimeter, check the electrical harness connector terminals for voltage.

Intake Manifold Runner Position Sensor 2 -G512- Electrical Harness Connector Terminal	Specified value
1 to Ground (GND)	about 5 V
2 to Ground (GND)	5 V or less
3 to Battery positive (+)	Battery positive (+)

If specified value is obtained:

-- Replace the Intake Manifold Runner Position Sensor 2 -G512-. Refer to Component Locations Overview .

If specified value is not obtained:

Checking wiring connections

If the manufacturers test box is being used, perform the following step.

-- Connect the Test Box 105 Pin VAG1598/42 with Adapter Cable1598/39-1. Refer to Component Locations Overview .

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

-- Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

-- Using a Multimeter, check the following electrical harness connector terminals for an open circuit.

Intake Manifold Runner Position Sensor 2 -G512- Electrical Harness Connector Terminal	Engine Control Module (ECM)J623 Electrical Harness Connector Terminal
1	29
2	50
3	40

Specified value: 1.5 Ω max.

If the specification is not obtained:

-- Check the wiring for a short circuit to Battery positive (+) or an open circuit.

-- If necessary, repair the wiring connection.

If no malfunctions are found in wires:

-- Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

The Intake Manifold Runner Position Sensor 2 -G512- must be adapted to the Engine Control Module (ECM) -J623-.

To adapt the Intake Manifold Runner Position Sensor 2 -G512- 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 Sec.

-- The Engine Control Module (ECM) -J623- will automatically adapt the Intake Manifold Runner Position Sensor 2 -G512-.

-- Assembly is performed in the reverse of the removal.

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 .
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 .