Jetta SportWagen L5-2.5L (CBUA) (2009)
If the manufacturers test box is being used, perform the following step.
-
Install the test box.
If the manufacturers test box is not being used, perform the following step.
-
Remove the Motronic Engine Control Module (ECM) (J623). Refer to --> [ Motronic Engine Control Module, Replacing ] .
-
Using a multimeter, check the Engine Speed (RPM) Sensor (G28) electrical harness connector terminals to the Motronic Engine Control Module
(ECM) (J623) electrical harness connector T121 terminals for an open circuit.
Specified value: 1.5 ohms Max.
If the specification was not obtained:
-
Check the wiring for an open, high resistance or short to ground.
-
Check the electrical harness connector for damage, corrosion, loose or broken terminals.
-
If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring:
-
Remove the Engine Speed (RPM) Sensor (G28) and check the sensor wheel for proper seating, damage and run-out13.
If the sensor wheel is OK:
-
Replace the Motronic Engine Control Module (ECM) (J623). Refer to --> [ Motronic Engine Control Module, Replacing ] .
Final procedures
After the repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. Refer to --> [ Diagnostic Mode 03 - Read DTC Memory ] See: Testing and Inspection/Scan Tool Testing and
Procedures/Diagnostic Mode 03 - Read DTC Memory.
2. If necessary, erase the DTC memory. Refer to --> [ Diagnostic Mode 04 - Erase DTC Memory ] See: Testing and Inspection/Scan Tool Testing
and Procedures/Diagnostic Mode 04 - Erase DTC Memory.
3. If the DTC memory was erased, generate readiness code. Refer to --> [ Readiness Code ] See: Testing and Inspection/Monitors, Trips, Drive
Cycles and Readiness Codes.