The supercharger diverter does nothing, even in solenoid test. The coil, plunger, wiring and voltage are all fine, and the diverter fires if its driver is grounded by hand.

Supercharger diverter dead even in test: open TIP102 at Q81 that tested good

Cause: The TIP102 predriver/driver at Q81 had failed open. Out of circuit it fooled both a component tester and a meter, reading like two diodes back to back, but tracing the logic showed it was not switching.

Checks

• Ground the driver transistor tab briefly to confirm the coil and wiring work.
• With a logic probe, follow the signal from the latch chip through each transistor stage to see where it stops.
• Don't trust an in-circuit or tester pass on a suspect transistor; replace it if the signal dies there.

Fix

• Replace Q81 (TIP102) for the diverter circuit.

Systems

• WPC Fliptronics

Games

• The Getaway: High Speed II

Related tips

• 20-second test for shorted coil driver transistors
• Where the WPC coil and lamp drivers sit
• How a WPC coil, flasher or lamp driver chain works
• Which transistor drives which WPC solenoid and lamp circuits
• A coil or flasher energizes as soon as the game is turned on
• WPC lamp matrix and GI driver parts
• The four groups of WPC coil outputs
• A lamp row very bright or dead

Source: Pinball Repair help group!! (Facebook group)