Test NF-9A - Checking Engine Controller Grounds & Power CKTS
NOTE:
For connector terminal identification, see CONNECTOR IDENTIFICATION. For appropriate wiring diagram, see WIRING DIAGRAMS at end of article.
- Turn ignition switch to OFF position. Disconnect Single Board Engine Controller (SBEC) 60-pin connector. Inspect SBEC connector. Repair connector if damaged. Perform VERIFICATION PROCEDURE VER-3.
- If connector is okay, put DRB-II in ohmmeter mode. Probe SBEC connector terminal No. 5 (Black/White wire). If resistance is more than one ohm, repair Black/White wire for an open to ground. Perform VERIFICATION PROCEDURE VER-3.
- If resistance is less than one ohm, probe SBEC connector terminal No. 11 (Black/Tan wire). If resistance is more than one ohm, repair Black/Tan wire for an open to ground. Perform VERIFICATION PROCEDURE VER-3.
- If resistance is less than one ohm, probe terminal No. 12 (Black/Tan wire) of SBEC connector. If resistance is more than one ohm, repair Black/Tan wire for an open to ground. Perform VERIFICATION PROCEDURE VER-3.
- If resistance is less than one ohm, turn ignition switch to ON position. Put DRB-II in voltmeter mode. Probe SBEC connector terminal No. 9 (Dark Blue wire). If voltage is less than 10 volts, repair open in Dark Blue wire. Perform VERIFICATION PROCEDURE VER-3. If voltage is more than 10 volts, reconnect SBEC connector. Test is complete.