Variable Induction Control Valve: Testing and Inspection

Component locations, refer to "Component Overview - II", Locations
- Disconnect intake manifold change-over valve harness connector.







- Switch multimeter (Fluke 83 or equivalent) to measure resistance (ohms) and connect between terminals on valve
Specified value: 25 to 35 ohms (ohms)

If the specified value is not obtained:
- Replace intake manifold change-over valve.







Checking voltage supply
- Disconnect intake manifold change-over valve harness connector.
- Connect VAG 1527B voltage tester between harness connector terminal 1 and Ground (GND) using jumper wires from connector test kit VW 1594.
- Use scan tool "Output Diagnostic lest Mode" function 03 to trigger fuel pump relay -J17-.
- Voltage tester must light up

If voltage tester does not light up:
- Check fuse for intake manifold change-over valve.
- Check wiring for continuity between intake manifold change-over valve harness connector terminal 1 and fuse, using wiring diagram.
Specified value: max. 1.0 ohms
- Check fuel pump relay and triggering, Testing and Inspection

Checking triggering
- Connect VAG 1527B voltage tester between intake manifold change-over valve connector terminal 1 (B+) and 2 using jumper wires from connector test kit VW 1594.
- Use scan tool "Output Diagnostic Test Mode" function 03 to trigger Intake manifold change-over valve.
- Voltage tester must flash

If voltage tester does not flash, or lights up constantly:
- Connect VAG 1598/19 test box to ECM.

If voltage tester lights constantly:
- Check wiring from intake manifold change-over valve connector terminal 2 to test box socket B4 to Ground (GND).

If voltage tester does not flash:
- Check wiring for continuity between terminal 2 of intake manifold change-over valve connector and socket B4 of test box.
- Specified value: max. 1.0 ohms







- If necessary eliminate break in wiring or short to Ground.

If wiring is OK:
- Replace ECM.