Intake Manifold Tuning (IMT) Valve Position Sensor G513 , Checking

Intake Manifold Tuning (IMT) Valve Position Sensor G513, 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.

Procedure







- Remove the front engine cover - arrows -.

Checking voltage supply







- Disconnect the Intake Manifold Tuning (IMT) Valve Position Sensor G513 electrical harness connector - 3 -.
Switch the ignition on.







- Using a Multimeter, check the Intake Manifold Tuning (IMT) Valve Position Sensor G513 electrical harness connector for voltage.

Intake Manifold Tuning (IMT) Specified
Valve Position Sensor G513 value
electrical harness connector
1 to Ground (GND) Battery positive (+)
2 to Ground (GND) about 5 V
3 to Battery positive (+) Battery positive (+)

Switch the ignition off.

If the specified values are obtained:
- Replace the Intake Manifold Tuning (IMT) Valve Position Sensor G513.

If specified values are not 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 Engine Control Module (ECM) J623.
- Using a multimeter , check the Intake Manifold Tuning (IMT) Valve Position Sensor G513 electrical harness connector terminals to the Engine Control Module (ECM) J623 electrical harness connector T94 terminals for an open circuit.

Intake Manifold Tuning (IMT) Engine Control Module
Valve Position Sensor G513 (ECM) J623 electrical
electrical harness connector harness connector T94 terminals or test box socket
1 63
2 52
3 9

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, lose 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.







- Install the front 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.
2. If necessary, erase the DTC memory.
3. If the DTC memory was erased, generate readiness code.

- End of diagnosis.