Vanagon/Type II Fuel Systems - Digifant

TROUBLESHOOTING GUIDELINES

Idle Stabilization - Checking

Power Steering

___ Engine idling, turn the steering wheel hard left (or right) to the
stop while observing multi-meter.

** Milliamp reading should increase.

___ If NO:  remove idle stabilization control unit.
Connect US 1115 L.E.D. tester to terminsals 5 and 15 of connector plug.
Start engine and turn wheels hard left (or right) to stop. L.E.D. tester
must come on with wheels turned hard to stop.

___ If YES: replace idle stabilization control unit.

___ If NO: check operation of power steering pressure switch . Switch
must close with engine running and wheels turned hard to stop.

___ If NO: replace power steering pressure switch.

___ If YES: check power steering pump pressure.

*NOTE:*
The amount of increase in the milliamp readings for the preceding steps
is dependent upon numerous factors. Of primary concern is that the
milliamp readings do increase for each step, which indicates that the
idle stabilization control unit is compensating for the prescribed load
change.

___ *If the idle stabilization control unit is functioning properly, but
the idle drops drastically or engine stalls when a load is applied, the
problem is with the idle stabilizer valve itself. *