Idle Stabilization System
- Attach Test Meter (VW 1315/2) and Adapter (US 1119) to idle stabilization valve. Set meter to milliampere scale. Start engine. Observe test meter while turning A/C control switch to on position. If milliampere reading increases, system is okay.
- If milliampere reading does not increase, turn ignition switch off. Connect test light between terminals No. 2 and No. 5 of idle stabilization control unit connector. See Fig 1
. Start engine and cycle A/C switch on and off.
- Test light should be on when A/C switch is in on position. If light is on, replace idle stabilization valve. If light does not go on, repair wiring between idle stabilization control unit terminal No. 2 and A/C compressor clutch.
Courtesy of VOLKSWAGEN UNITED STATES, INC.