Mil Continues Blinking At A Cycle Of 3 HZ

Turn ignition off and disconnect ECM connector B135 (28-pin connector). Using an ohmmeter connected to ground, measure resistance at terminal No. 14. See Figure. If resistance is less than 5 ohms, repair short in circuit between ECM and test mode connector. If resistance is not less than 5 ohms, replace ECM and retest system. See appropriate wiring diagram in WIRING DIAGRAMS article.