WASTEGATE Bypass Regulator Valve, Checking

Observe all safety precautions: SAFETY PRECAUTIONS

View clean working conditions: CLEAN WORKING CONDITIONS

Prior to repair work, perform a preliminary check to verify the condition. Refer to PRELIMINARY CHECK .

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

See Appropriate Wiring Diagram Information for component locations and connector views.

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.
On vehicles with automatic transmission, selector lever in position "P" or "N".
A/C switched off.
Ground connections between engine/transmission/chassis OK.
Ignition switched Off.

Start Diagnosis

-- Remove the engine cover with air filter.

Checking internal resistance

-- Disconnect the Wastegate Bypass Regulator Valve -N75- electrical harness connector.

-- Using a multimeter, check the Wastegate Bypass Regulator Valve -N75- terminals 1 to 2 for resistance.

Specified Value: 12 To 18 Ω (At Approx. 20° C)

If The Specified Value Was Not Obtained:

-- Replace the Wastegate Bypass Regulator Valve -N75- Refer to the Repair information.

If The Specified Value Was Obtained:

Checking Voltage supply

-- Start the engine.

-- Using a multimeter, check the Wastegate Bypass Regulator Valve -N75- electrical harness connector terminal 1 to engine ground.

Specified Value: Battery Voltage.

-- Switch the ignition Off.

If The Specified Value Was Not Obtained:

-- Check the wiring for a short circuit to ground, high resistance or an open circuit.

-- Check fuse 23 (2010 Model) or fuse 5 (2011 Model) in Fuse Panel B for open and replace if blown. Refer to Appropriate Wiring Diagrams for fuse locations.

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

-- If necessary, repair the wiring connection.

If The Specified Value Was Obtained:

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-.

-- Using a multimeter, check the Wastegate Bypass Regulator Valve -N75- electrical harness connector terminal to the Motronic Engine Control Module (ECM) -J623- electrical harness connector terminal for an open circuit.

Wastegate Bypass Regulator Valve -N75- electrical harness connector terminal	Motronic Engine Control Module (ECM) -J623- electrical connector T60 terminal or test box socket
2	20

Specified Value: 1.5 Ω Max.

If The Specified Value Was Not Obtained:

-- Check the wiring for an open or high resistance.

-- 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 And If The Voltage Supply Was OK:

-- Replace the Motronic Engine Control Module (ECM) -J623-.

-- Install the engine cover with air filter.

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 .