Test N - Ignition Diagnostic Monitor (IDM): Notes
NOTE:
Perform this test when Code 14, 18, 19, 28, 45, 46, 48 or 88 is displayed during QUICK TESTS or when directed here by other test procedure or driveability symptom. This test is intended to diagnose only the EEC-IV portion of the ignition system. For additional information on ignition system and component testing, see SYSTEMS & COMPONENT TESTING article.
NOTE:
To prevent replacement of good components, be aware that the following non-EEC related areas may be at fault:
- TFI or DIS ignition module
- Ignition coil or DIS coil packs
- Spark plugs and/or high tension cables
- Distributor and PIP sensor
- Secondary ignition component arcingNOTE: This test is intended to diagnose the following circuits and components.
- Harness circuits (IGN GND, SPOUT, PIP, IDM, DPI & SAW)
- ECA assembly
TEST PIN WIRE COLOR IDENTIFICATION
| Application (Test Pin No.) | Wire Color | |
|---|---|---|
| Pin 4, IDM | ||
| 5.0L MA (Town Car) | White/Light Blue | |
| All Others | Dark Green/Yellow | |
| Pin 16, IGN GND | ||
| All Models | Black/Orange | |
| Pin 36, SPOUT/SAW | ||
| 5.0L (Town Car) | Gray/Orange | |
| All Others | Yellow/Light Green | |
| Pin 56, PIP | ||
| All Models | Dark Blue | |
There are 4 types of ignition system connections used with EEC-IV. They are configured as follows: