Code 2 (Open Isolate Circuit)
- Turn ignition off. Disconnect battery. Unplug control module harness connector. Measure resistance between module connector pin No. 13 and ground. If resistance is 6 ohms or less, replace control module, and retest system.
- If resistance is greater than 6 ohms, reconnect module connector. On Bronco, "E" and "F" Series, disconnect electro-hydraulic valve connector. On all others, go to step 4). On Bronco, "E" and "F" Series, measure resistance between ground pin (harness side) and ground. See Fig 1
.
- If resistance is one ohm or more, repair open in ground circuit wire. If resistance is less than one ohm, measure resistance between isolation solenoid pin and ground pin on valve side. See Fig 1
. If resistance is 6 ohms or less, repair open between isolation solenoid valve and control module.
- On all others, disconnect electro-hydraulic valve connector. See Fig 1
. Measure resistance between isolation solenoid pin and ground pin on valve side. If resistance is greater than 6 ohms, replace electro-hydraulic valve and retest. If resistance is 6 ohms or less, repair open between isolation solenoid valve and control module.
Courtesy of FORD MOTOR CO.