Testing activation
- Connect voltage tester V.A.G 1527 B to contact 1 (positive) and contact 2 of connector.
- Vehicle diagnostic, testing and information system VAS 5051 is connected; vehicle system "01 - Engine electronics" is selected. Ignition must be switched on.
Display on VAS 5051:
- Select diagnosis function "03 - Final control diagnosis" from menu -1-
- Press the > button repeatedly until following display appears:
Display on VAS 5051:
A - Actuator test is waiting - Continued switching required
4 - Charge pressure control valve -N75-
- Press the > button.
Display on VAS 5051:
A - Actuator is running - Continued switching allowed
- LED should flash.
- Press the < button to exit from function "03 - Final control diagnosis".
If LED lamp does not flash or if it lights up continuously:
- Connect test box V.A.G 1598/31 to wiring harness connectors; do not connect engine control unit. Attach ground clip of test box to chassis (not shown in illustration).
See WIRING AND COMPONENT CHECK USING TEST BOX V.A.G. 1598/31 .
WARNING:
To prevent damage to electronic components, switch to respective measuring range before connecting measuring cable and observe test prerequisites.
- Test for open circuit and short to positive or ground in following wiring connections:
WASTEGATE BYPASS REGULATOR VALVE CIRCUIT TEST - ACTIVATION
| Connector Contact | Test box V.A.G 1598/31 Socket |
|---|---|
| 2 | 116 |
- Eliminate open circuit or short circuit using wiring diagram.
If wiring is OK:
- Replace engine control module. See MOTRONIC ENGINE CONTROL MODULE (ECM) -J220-, REPLACING .
- Install air filter housing. See INSTALLING .