Test 26, Isolate EEC-IV Processor (ECA) From Pip Circuit

With key off, reconnect diagnostic cable connector to DIS module (Pins No. 1-6). See Figure. Disconnect ECA. Crank engine. Does test light blink continuously when engine is cranked? If no, go to TEST 27. If yes, replace ECA. Check for fault codes. See appropriate TESTS W/CODES article in the ENGINE PERFORMANCE section.