TFI WORKSHEET EEC-IV SYSTEMS TYPICAL TO PERFORM THESE TESTS YOU WILL NEED: 12V TESTLITE, DVOM AND A SUPPLY OF STRAIGHT PINS. NOTE: Prior to starting Step 1, disconnect Injectors to prevent flooding engine with fuel. 1. 2. Voltage at positive coil desired 12V, actual (Key On/Engine Off). Voltage at negative coil desired 12V, actual (Key On/Engine Off). TESTS 1 and 2 PERFORMED WITH IGNITION KEY ON. . Using testiite at negative coil, crank engine, watch that testiite flickers OK. If it does not flicker, problem Is Indicated. Turn key OFF. . Disconnect coil connector, measure primary and secondary coil resistances, also path to ground, Primary coil .5-1.5 ohms desired, actual Secondary coil - 7K-15K ohms desired, actual Path to ground ohms infinity desired, actual Reconnect primary and secondary wires. . Disconnect TFI module connector at distributor, with DVOM on 20-volt scale. . insert straight pins into connector to measure @ wiring harness: grout Run" voltage desired 12V, actual (Key On/Engine Off). START Coil voltage desired 12v, actual h (Key On/Engine Off). 23.1 Start" voltage desired 8-10V, actual _ (engine cranking). '5" GND 3 7. Check distributor to engine/block ground desired 0 ohms, actual 10. 11. 12. 13. 14. . Check TFI module to distributor ground at Pin 6 desired 0 ohms, actual Reconnect TFI connector. . Check Hall effect device output @ SPOUT harness connector while cranking engine desired 5-7V, actual (distributor side of connector). If #9 is not correct, disconnect ECA and redo test at Pin #56 desired 5-7V, actual . NOTE: Either a power relay or damaged ECA can cause no-spark. If #10 is not correct, check continuity of blue PIP wire to distributor from Pin #56. If #10 is correct, reconnect harness to a substitute processor and redo Step #9. If you do not get 5-7V on SPOUT or PIP wires during crank in any of steps 9-12, Hall effect device in distributor is probably shorted. Once you have a good 5-7V PIP signal, if you still do not have pulsating at negative coil the TFI module is bad provided all the other steps 1-8 are OK. Reconnect injectors. DO NOT SHORT-CUT THIS TEST IF YOU DO SO YOU CAN DESTROY A NEW MODULE, A NEW HALL EFFECT DEVICE, A NEW PROCESSOR ALL THREE. 55