DIS Module Spark Quick Test

DIAGNOSTIC AIDS

^ DIS module spark quick test:

^ Remove all four plug wires at the coil towers.

^ Have an assistant crank the engine. You should see sparks appear alternately between each pair of coil towers during cranking.

^ The DIS module, crankshaft position sensor and the coil packs are good if sparks appear between the coil towers.

CAUTION: The DIS system can produce extremely high voltages. Do not attempt to service this system while the engine is running or is being cranked.

^ The measured resistance from tower to tower on the coils should be 7-10k Ohms.

^ The measured resistance of the crankshaft position sensor should be 700-900 Ohms.

^ To test for spark at spark plug wires use a spark test tool ST-125, or equivalent.

^ Engine firing order is 1-3-4-2.

^ Reversed CPS wires will result in a no start condition.