Intake Manifold Runner Position Sensor, Checking
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 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 the 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 terminal 1 to ground for voltage.
Specified value: near 5 V
-- Switch ignition OFF.
If the specified values were obtained:
-- Using a multimeter, connect the black lead to terminal 3 and the red lead to Battery positive.
Specified value: Battery voltage.
If the specified values were Not obtained:
-- Check the wiring for an open, high resistance or short to ground.
-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
-- If necessary, repair the faulty wiring connection.
If the specified values were 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: 204 - 284 Ω (at approx. 20° C)
If the specified values were Not obtained:
-- Make sure the Intake Flap Motor - V157- is not stuck. If the flap is OK, replace theIntake Manifold Runner Position Sensor -G336-. Refer to appropriate Service Information.
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 the 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 | 59 |
| 3 | 13 |
Specified value: 1.5 Ω Max.
If the specified values were Not obtained:
-- Check the wiring for an open, high resistance or short to ground.
-- 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 the appropriate Service Information.
-- Install the engine cover with air filter. Refer to the appropriate Service Information.
Final procedures
After the repair work, the following work steps must be performed in the following sequence:
- Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
- If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
- If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .