Diagnostic Aids
Perform this test when directed by QUICK TEST. This test is intended to diagnose:
- ECA.
- KAPWR wiring harness circuits.
| Application | Wire Color |
|---|---|
| Escort 1.9L, Probe 3.0L & Tracer 1.9L | Blue/Red |
| Mark VII | Black/Orange |
| Town Car | Yellow/Black |
| All Others | Yellow |
1) Check KAPWR Circuit Voltage Code 15/512 indicates ECA power interruption in Keep-Alive Memory (KAM). Turn ignition off. Disconnect 60-pin ECA connector. Inspect terminals, and repair if damaged. Install EEC-IV Breakout Box (T83L-50-EEC-IV), leaving ECA disconnected. Measure voltage between test pin No. 1 and pin No. 40 or 60 at breakout box. Observe voltage reading while wiggling, bending and shaking small sections of EEC-IV wiring harness from ECA to dash. If reading is less than 10.5 volts, repair open circuit and repeat QUICK TEST . If reading is 10.5 volts or more, go to step 2).
Continuous Memory Code 15/512 may be displayed when power between ECA and KAPWR is interrupted. This code may be set when a breakout box is installed or battery is disconnected.
2) Inspect Engine Compartment Wire Routing Ensure EEC-IV wiring is not routed close to ignition components and secondary ignition wires. If necessary, reroute EEC wiring. Clear codes, and wait 5 minutes. Repeat KOEO SELF-TEST . If Continuous Memory Code 15/512 is no longer displayed, Continuous Memory Code 15/512 testing is complete. If Continuous Memory Code 15/512 is still present, replace ECA and repeat QUICK TEST .