Passat Sedan L4-1.9L DSL Turbo (AAZ) (1995)
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Diesel MFI Pump: Testing and Inspection
Diesel Injection Start Timing, Checking
INJECTION START POSITIONER CONTROLLED, LOAD-DEPENDENT INJECTION TIMING, CHECKING
The Injection Start Positioner controlled, load-dependent injection timing is integrated into the injection pump. It adjusts injection timing relative
to engine load providing a smoother running engine.
Above approx. 2800/rpm the load-dependent injection timing is cut-off by the Injection Start Positioner (N165) -1-, which is controlled by the
Automatic Glow Time Control Module (J179).
Injection pump cut-off, checking
-
Disconnect Injection Start Positioner connector.
-
Connect VAG 1527B LED tester to connector.
-
Start engine and raise engine speed to approx. 3000/rpm:
LED tester must light up.
If the LED tester does NOT light up
- Locate malfunction using wiring diagram, or replace the Automatic Glow Time Control Module (J179).
Injection Start Positioner, checking
-
Remove Injection Start Positioner, connect to ground and Battery +
Injection Start Positioner must operate.
