Circuit Test Ll
To prevent replacement of good components, be aware that the following non-EEC related areas may be at fault: ignition module, ignition coil, spark plugs and/or high tension cables, distributor and PIP sensor.
- Turn key off and wait 10 seconds. Disconnect E-Core ignition connector from coil. Disconnect ECA 60-pin connector. Inspect for and repair any damaged wiring. Install breakout box, leaving ECA disconnected. Set DVOM on 200,000-ohm scale. Measure resistance between test pin 4 and negative terminal on ignition coil. If reading is less than 20,000 ohms or higher than 24,000 ohms, repair open circuit and repeat QUICK TEST . If reading is between 20,000 and 24,000 ohms, go to next step.
- Turn key off and wait 10 seconds. Leave breakout box installed and ECA disconnected. With DVOM on 200,000-ohm scale, measure resistance between test pin 4 and test pins 40, 46, and 60. If any reading is less than 10,000 ohms, repair short to ground and repeat QUICK TEST . If all readings are 10,000 ohms or more, go to next step.
- Turn key off and wait 10 seconds. Deactivate SELF-TEST. Using CONTINUOUS MONITOR (WIGGLE) TEST , observe VOM or STAR tester LED for indication of fault while lightly tapping on TFI module and wiggling TFI harness connector. If fault is indicated, disconnect TFI harness. Inspect connector and terminals for damage. If connector and terminals are okay, check TFI ignition system. If no fault is indicated, go to next step.
- While in CONTINUOUS MONITOR (WIGGLE) TEST , observe VOM or STAR tester LED for indication of fault while wiggling, shaking, or bending small sections of harness while working from TFI connector toward firewall. Repeat process from firewall to ECA. Perform this test to check for faults in the following circuits:
TEST CIRCUITS
| Condition | Test Pin |
|---|---|
| PIP Open/Shorted to Ground | Check circuit at Test Pin 56. |
| SPOUT Shorted to Ground | Check circuit at Test Pin 36. |
| Ignition Ground Open | Check circuit at Test Pin 16. |
| IDM Open/Shorted to Ground/Power | Check circuit at Test Pin 4. |
Perform CONTINUOUS MONITOR (WIGGLE) TEST on circuits one at a time in order to isolate fault. If fault is indicated, isolate and repair harness. Repeat QUICK TEST . If no fault is indicated, go to next step.
5) Turn key off and wait 10 seconds. Disconnect ECA 60-pin connector. Inspect connectors and terminals for damage. If connectors and terminals are damaged, repair as necessary and repeat QUICK TEST . If connectors and terminals are okay, fault cannot be duplicated at this time. IDM testing is complete. Connect ECA.