Toyota Repair: 1992 Previa LE Running, distributor shaft, position sensors

Question
Problem began with no spark at the plugs and was traced to rotor that had loosened (after 120K miles), impacted distributor cap, destroying the rotor and causing the center (coil) wire section of the distributor cap to come apart. Replaced rotor and cap and car difficult to impossible to start/keep running. Found 'reluctor' had spun on distributor shaft. Replaced distributor and it is difficult to start. Once started it will run but after some time of driving it will suddenly shut off. Took to dealer who ran diagnostic which indicated distributor resistance was between 6000 and 7000 ohms. (Resistance reading apparently is the RPM and crank position sensors.) Took back to mechanic (non-dealer) who had replaced the distributor. He measured resistance at distributor and says he's getting around 200 ohms (within spec) but will be replacing the distributor with another remanufactured unit on Monday.

(1) How does the dealer measure the resistance - that is, are they measuring it at the ECU?
(2) If measurement at the connector on the distributor is 200 ohms and the dealer is measuring 6000 to 7000 ohms at the ECU what do you think the problem could be?
(3) Do the symptoms continue to point to the engine firing/timing?

Thank you.

Answer
The resistances of the sensors in the distributor are always checked at the distributor with the connectors unplugged, if the distributor readings were within specifications but higher at the ECU connector then it would seem there is high resistance in the wiring, I have no idea how the dealer measured the resistance or where they checked it but the wiring from the distributor to the ecu should be checked with the ecu connector disconnected other wise the reading includes the resistance inside the ecu circuits.