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Home >> Volkswagen >> 2003 >> Jetta Sedan (9M2) L4-1.8L Turbo (AWP) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> Overrun Shut-Off Valve, Checking >> With Generic Scan Tool
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With Generic Scan Tool



Deceleration Shut-off Valve, Checking

Recommended special tools and equipment







- V.A.G 1390 hand vacuum pump

Requirement
- Performance deficiency or tip-in shocks

Test sequence

NOTE: The deceleration shut-off valve is located in front of the turbocharger. It is opened by vacuum during deceleration and at idle.







- Connect hand vacuum pump V.A.G1390 to vacuum connection for deceleration shut-off valve.
- Operate vacuum pump.

Deceleration shut-off valve must open in direction of arrow
- Operate ventilation valve at vacuum pump.

Deceleration shut-off valve must close

If deceleration shut-off valve does not open or does not close, replace valve.

NOTE: Secure connections of deceleration valve using screw-type clamps.

- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
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