Idle Speed Stabilizer Valve
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1987 Volkswagen Scirocco, 1987 Volkswagen Quantum, 1987 Volkswagen Jetta, 1987 Volkswagen Golf, and 1987 Volkswagen GTI. However, it is still accessible from the selected car via links, so may be relevant.
- Connect Tester (VW 1367 ) using Cable Adapter (US 1112 ). Connect ohmmeter between terminal No. 1 of test connector and terminal No. 15 of main ECU connector. With stabilizer valve disconnected there should be continuity between these terminals.
- Connect ohmmeter to terminal No. 2 of the test connection and terminal No. 3 of the central connector. With stabilizer valve disconnected there should be continuity between these terminals. Check and repair any open circuits using wiring diagrams for reference.
- With stabilizer valve disconnected, connect voltmeter between terminal No. 2 of the idle stabilizer valve connector and ground. With ignition on, battery voltage should be present. See Fig 1.
- With ignition off, check for continuity between terminal No. 3 of the of the idle stabilizer valve connector and terminal No. 3 of the main ECU connector. Check for continuity between stabilizer connector terminal No. 1 and ECU connector No. 4.
- Correct any open circuits and reconnect idle stabilizer valve connector. Connect ohmmeter between terminals No. 3 and 4 of the main ECU connector. Resistance specification is 24-30 ohms. Replace idle stabilizer valve if not within specification.