Checking activation
WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
- Connect VAG1527B voltage tester as follows:
| Valve for camshaft adjustment | Harness connector Terminal |
| Intake bank 1, Valve -1- for camshaft adjustment -N205- | 1 + 2 |
| Intake bank 2, Valve -1- for camshaft adjustment -N208- | 1 + 2 |
| Exhaust bank 1, Camshaft Adjustment Valve 1 (exhaust) -N318- | 2 + 3 |
| Exhaust bank 2, Camshaft Adjustment Valve 1 (exhaust) -N319- | 2 + 3 |
- Initiate output Diagnostic Test Mode (DTM) and activate valve for camshaft adjustment.
- LED must blink
If LED does not blink or if it remains constantly lit:
- Connect VAG1598/31 test box to harness connectors of wiring harness (do not connect ECM). Connect Ground (GND) clip at test box (not visible in illustration) to Ground (GND).
Refer to 24 MULTIPORT FUEL INJECTION (MFI)
- Check following wire connections for open circuit and short circuit to Ground (GND) and B+:
| Valve for camshaft adjustment | Harness connector Terminal |
VAG1598/31 test box Socket |
| Intake bank 1, Valve -1- for camshaft adjustment -N205- | 1 | 115 |
| Intake bank 2, Valve -1- for camshaft adjustment -N208- | 1 | 120 |
| Exhaust bank 1, Camshaft Adjustment Valve 1 (exhaust) -N318- | 1 | 22 |
| Exhaust bank 2, Camshaft Adjustment Valve 1 (exhaust) -N319- | 1 | 18 |
- Repair short circuit to Ground (GND) connection or open circuit if necessary.
If wire connection is OK:
- Replace Engine Control Module (ECM).
If no malfunctions are detected:
- Replace mechanical camshaft adjuster. Refer to Valve train, servicing , i.e. camshafts, removing and installing: Refer to Camshafts and camshaft adjusters, removing and installing .