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Home >> Ford >> 1990 >> Pickup F150, 2D Pickup, 5.0 N, RWD, Standard, M5OD-R2 >> Repair and Diagnosis >> External Pages >> Different car >> Section 3 (Engine Controls - Basic Testing) >> Electronic DISTRIBUTORLESS Ignition System (EDIS) 4.0L Engine >> Test 44, Check For Saw Open

Test 44, Check For Saw Open

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 1991 Ford Ranger, 1991 Ford RV Cutaway, 1991 Ford Pickup, 1991 Ford F-Super Duty, and 1991 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

With key off and ECA disconnected, set DVOM to 2-k/ohm scale. Measure resistance between breakout box pin No. J45 (SAW E) and vehicle harness connector pin No. 36. See Figure. If resistance is less than 5 ohms, SAW is not being transmitted by ECA. Replace ECA. Remove all test equipment, and reconnect all components. Clear Continuous Memory, and check for fault codes. If resistance is greater than 5 ohms, repair open circuit. Remove all test equipment, and reconnect all components. Clear Continuous Memory, and check for fault codes.

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