Test Ml: Step 5

5) CHECK ENGINE or SERVICE ENGINE SOON Light Never On: Check Continuity of STO/MIL Circuit  If vehicle will not start, go to TEST A, step 1). Turn key off. Disconnect ECA 60-pin connector. Inspect connector for damaged pins, corrosion, or loose wires. Repair if necessary. Install breakout box, leaving ECA disconnected. Set DVOM on 200-ohm scale. Measure resistance between test pin No. 17 and CHECK ENGINE or SERVICE ENGINE SOON light. If resistance is less than 5 ohms, go to next step. If not, repair open circuit in wiring harness. Remove breakout box, reconnect all components and repeat QUICK TEST.