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Home >> Audi >> 1982 >> 5000 Base, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Ignition System >> BOSCH Hall Effect Electronic Ignition >> Testing - SAAB >> System Check Without Spark
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System Check Without Spark

  1. If there was no spark in System Spark Check, test high tension part of ignition system.
  2. Coil wire resistance should be 800-1200 ohms. Spark plug wire resistance for cylinders 1 and 2 should be 2, 600-3, 900 ohms; for cylinders 3 and 4, the resistance should be 2, 400-3, 600 ohms. Distributor rotor resistance should be 5, 000 ohms.
  3. Recheck for spark across 1/2" gap to ground. If spark occurs, turn control unit around grounded bolt until fuse is visible from side. Pull back rubber cover from fuse, but do not remove fuse.
  4. Connect voltmeter positive lead to terminal 4 and negative lead to terminal 2. Turn ignition switch "ON". Battery voltage should be read. If not, check wiring back to battery.
  5. If voltage is correct, remove connector from distributor and check voltage at connector's positive and negative terminals. Battery voltage should be read. If not, check wiring back to control unit. If satisfactory, replace control unit.
  6. If battery voltage was present, connect voltmeter positive lead to control unit terminal 6 and negative lead to terminal 3. Remove distributor cap and dust cover. Turn engine over so the shutter blades are outside the Hall switch.
  7. Turn ignition switch "ON". Voltage should read about 0.4 volt. If so, turn engine over until shutter blades enter Hall switch gap. Voltage should now read 1 volt or more. If readings are not to specifications, replace distributor.
  8. If voltage in step 7)  was correct, perform steps 3)  through 6)  of System Check With Spark.
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