- Fuse for valves for camshaft adjustment OK.
Electrical Wiring Diagrams, Troubleshooting & Component Locations
Scheme 354
- Connect VAG1527B voltage tester as follows
| Harness connector Terminal | Measure to |
|---|---|
| 2 | Engine Ground (GND) |
CHECKING CAMSHAFT ADJUSTMENT VOLTAGE SUPPLY CIRCUIT
- Switch ignition on. LED must light up.
If LED does not light up
- Check wire connection from terminal 2 of connector via fuse to Motronic Engine Control Module (ECM) Power Supply Relay -J271- for open circuit
- Repair open circuit if necessary.
If LED lights up
Scheme 355
- Connect VAG1527B voltage tester as follows: CHECKING CAMSHAFT ADJUSTMENT VOLTAGE ACTIVATION CIRCUIT 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 the valve for camshaft adjustment. LED must blink.
If LED does not blink or if it remains constantly lit
Scheme 356
Scheme 357
- 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 see scheme 370 ) to Ground (GND). See «WIRING AND COMPONENT CHECK WITH TEST BOX VAG 1598/31»(ref-213315-S24250644882005122900000).
- Check the following wire connections for open circuit and short circuit to Ground (GND) and B+: CHECKING CAMSHAFT ADJUSTMENT CIRCUIT FOR OPENS/SHORTS 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. See «ELECTRICAL TEST OF SOLENOID VALVE FOR CAMSHAFT ADJUSTMENT»(ref-197058-S26085909562005101100000) , or «CAMSHAFTS AND CAMSHAFT ADJUSTERS, REMOVING AND INSTALLING»(ref-197058-S08890454852005101100000) .