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gear (M/T) or position "2" (A/T). Press "M" button on turbocharger tester when engine speed is at 3000 3. If specified boost pressure is exceeded, go to next step. If specified boost pressure is not as specified, recheck wastegate by-pass regulator. See TEST PROCEDURE - WASTEGATE BY-PASS 4. Check for blockage between charge air cooler and turbocharger. Check wastegate and operating rod operation. Ensure wastegate by-pass valve is securely mounted to turbocharger. Repair as necessary. Test Procedure - Turbocharger, Charge Pressure (Beetle - Engine Code AWP, GTI, Jetta & Passat) 1. Start engine and idle. With a helper to operate tester from rear seat. Using scan tool check duty cycle of 2. With a helper to operate tester from rear seat. Using scan tool check actual boost pressure at WOT. Accelerate to wide open throttle from low speed in 2nd gear (M/T) or 4th gear with Tiptronic System 3. If boost pressure reading is not okay, see CHARGE AIR PRESSURE SENSOR . If boost pressure is still not okay check turbocharger for damage or blockage. Erase DTC memory. Verify repair. Test is DTC P1558/17966: THROTTLE VALVE DRIVE (186) - CIRCUIT MALFUNCTION Circuit/Component Description NOTE: Beetle with engine code (AWP), GTI, Jetta and Passat turbocharger CAUTION: Test duration during measurement should be limited to a maximum of 10 seconds. NOTE: If a test ends with ECM replacement. Before replacing ECM be certain that, all
2003 Volkswagen New Beetle GLS 2002-2003 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo
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