Cabrio GLX L4-2.0L (ABA) (2001)
-
Connect multimeter with auxiliary cables from VAG 1594 to measure voltage at contacts 3 + 4 (connector to Motronic control module).
-
Start engine and measure the basic voltage.
Specification: 0.40 to 0.50 V
-
Switch ignition off.
If the specification is not obtained:
-
Check Oxygen sensor wiring
If the specification is obtained:
-
Replace Oxygen sensor 2 -G130-.
Checking Oxygen sensor wiring, Oxygen sensor 2
-
Connect test box VAG 1598/22 to control module wiring harness.
-
Check wiring for open circuit between test box and 4 pin connector to Motronic control module using wiring diagram.
Contact 3 + socket 51
Contact 4 + socket 52
Wire resistance: Max. 1.5 Ohm
-
Additionally check wiring at 4 pin connector for short to one another.
Contact 4+socket 51, specification: Infinite Ohm
If no wiring malfunction is detected:
-
Replace engine control module.