80 Quattro L5-2309cc 2.3L SOHC (NG) (1988)
Fig. 16 Air Flow Meter Potentiometer Voltage Value Graph
d. Compare output voltage to supply voltage, noted in step 5, according to graph in Fig. 16.
e. If the output voltage is only slightly below the specified values, check for air leaks in:
1. Intake air boot
2. Crankcase ventilation hoses
3. Charcoal canister hoses
4. Vacuum lines
f.
If the system has no leaks, see "AIR FLOW SENSOR POTENTIOMETER" in "ADJUSTMENT PROCEDURES.".