-
● → Fuse S232 OK (in fuse holder, position 32).
-
● Battery voltage at least 11 V
-
● Alternator OK
Test sequence
-
‒ Connect the V.A.G 1598/31 test box to wiring harness leading to engine control unit; engine control unit should not be connected .
-
‒ Switch on the ignition.
Note:
-
◆ The positive voltage supply to the engine control unit is provided via contact 3 (terminal 15) and contact 62 (terminal 30).
-
◆ The earth connection to the engine control unit is provided via contact 1 and contact 2.
-
‒ Connect multimeter as follows to measure voltage:
|
|
|---|
|
Test box V.A.G 1598/31
Bush
|
Measure to
|
|
1
|
Battery positive
|
|
2
|
Battery positive
|
|
62
|
Engine earth
|
-
‒ Specified value: approx. battery voltage
- Connect multimeter as follows to measure voltage:
|
Test box V.A.G 1598/31
Bush
|
Measure to
|
|
3
|
Engine earth
|
-
‒ Switch on the ignition.
-
‒ Specified value: approx. battery voltage
If the specified values are not attained:
=> "Current Flow Diagrams, Electrical Fault Finding and Installation locations" binder
|
