Test D15 - Code 15 KOEO Continuous

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 1988 Ford Ranger, 1988 Ford RV Cutaway, 1988 Ford Pickup, 1988 Ford F-Super Duty, and 1988 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Perform this TEST when directed by other test procedures.

Fig 1: EEC Power Relay Circuit

Continuous Code 15 Displayed - Clear continuous memory codes using procedure outlined in CONTINUOUS SELF-TEST . Repeat KOEO SELF-TEST through continuous memory code output. If continuous code 15 is not displayed, continuous code 15 testing is complete. If continuous code 15 is displayed, go to next step.
NOTE: Continuous code 15 may be displayed when power to Keep Alive Memory (KAM) Test Pin No. 1 at ECA is interrupted. Code 15 may also be displayed the first time SELF-TEST is performed and power is restored to ECA. Repeat SELF-TEST to ensure correct diagnosis.
Engine Compartment Wire Routing - Ensure that EEC components and wiring are not close to high tension secondary voltage wires or ignition components. If EEC wiring is close to high tension wires, reroute EEC wiring. Repeat QUICK TEST . If continuous code 15 is no longer displayed, continuous code 15 testing is complete. If continuous code 15 is still displayed, go to next step.
Checking Power Circuit For Keep Alive Memory (KAM) - Turn key off and wait 10 seconds. Disconnect ECA 60-pin connector and inspect for damage. Install breakout box, leaving ECA disconnected. Set DVOM on 20-volt scale. Connect DVOM positive test lead to Test Pin No. 1 and negative test lead to pins No. 40 or 60. Turn key on and observe voltage reading. If reading is less than 10.5 volts, repair open to KAM circuit. Repeat QUICK TEST . If reading is 10.5 volts or more, replace ECA and repeat QUICK TEST.