90CS Quattro V6-2.8L (AFC) (1995)
ECM Harness Connectors
If specified values are not obtained:
-
Eliminate short circuit or break in wiring between RPM sensor connector and ECM connector -C-.
Sensor connector
ECM connector C terminal
1
5
3
2
Ground
4(GND)
If no malfunction has been found up to this point:
-
Inspect teeth on starter gear.
^
The starter must be removed in order to check the gear
-
Turn engine slowly and check flywheel for runout and also whether any teeth are broken or damaged; replace if necessary.
If no malfunction was found in all tests so far:
-
Replace ECM.