Test Ml: Step 15

15) CHECK ENGINE or SERVICE ENGINE SOON Light Flashes With Erratic Idle: Check STI Circuit For Short to Ground Vehicle symptoms indicate STI is grounded and ECA is performing Self-Test without tester installed. With key off, disconnect ECA 60-pin connector. Inspect connector for damaged pins, corrosion, or loose wires. Repair if necessary. Set DVOM on 200-k/ohm scale. Measure resistance between STI connector and engine block ground. If resistance is less than 10 k/ohms, repair short circuit. Reconnect ECA and retest. If resistance is not less than 10 k/ohms, reconnect ECA. Verify symptom and test for other rough idle symptoms.

NOTE: There is a break in the step numbering sequence at this point, skipping from step 15) to step 20). Break is due to previous chart references to these testing procedures. No test procedures have been omitted.