Intake Manifold Runner Position Sensor 2, Checking

Intake Manifold Runner Position Sensor 2, Checking

Special tools, testers and auxiliary items required

• Multimeter.

• Wiring diagram.

Test requirements

• The Engine Control Module (ECM) (J623) fuses 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.

Test procedure

- Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] Preliminary Check

Start diagnosis

Procedure

- Remove the rear engine cover - arrows -.






Checking voltage supply

• The Intake manifolds have been removed for clarity.

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






Switch the ignition on.

- Using a Multimeter , check the Intake Manifold Runner Position Sensor 2 (G512) electrical harness connector for voltage.











Switch the ignition off.

If the specified values are 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 ohms (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] ohms (at approx. 20° C)

If the specified values were not obtained:

- Replace the Intake Manifold Runner Position Sensor (G336). Refer to appropriate service information.

If the specified value was obtained:

- Replace the Intake Manifold Runner Position Sensor 2 (G512).

If specified values are not obtained:

Checking wiring

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

- Install the test box. Refer to appropriate service information.

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

- Remove the Engine Control Module (ECM) (J623). Refer to appropriate service information.

- Using a multimeter , check the Intake Manifold Runner Position Sensor 2 (G512) electrical harness connector terminals to the Engine Control Module (ECM) (J623) electrical harness connector T105 terminals 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 (+), and Ground (GND).

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

- If necessary, repair the faulty wiring connection.

- Erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Modes 01 - 0A

- Perform a road test to verify repair.

If the DTC does not return:

Repair complete, Generate readiness code. Refer to => [ Readiness Code ] Programming and Relearning.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK:

- Replace the Motronic Engine Control Module (ECM) (J623). Refer to appropriate service information.

- Assembly is performed in the reverse of the removal.

- Install the rear engine cover - arrows -.






Final procedures

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. => [ Diagnostic Mode 03 - Read DTC Memory ] Diagnostic Modes 01 - 0A.

2. If necessary, erase the DTC memory. => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Modes 01 - 0A.

3. If the DTC memory was erased, generate readiness code. => [ Readiness Code ] Programming and Relearning.