Test NF-9A - Checking Engine Controller Grounds
NOTE:
For connector terminal identification, see CONNECTOR IDENTIFICATION
. For wiring diagram, see WIRING DIAGRAMS
at end of article.
- Turn ignition off. Disconnect and inspect engine controller connector. Repair connector as necessary. Perform VERIFICATION TEST VER-2 . If connector is okay, go to next step.
- Place DRB-II in ohmmeter mode. Probe Black wire (Black/Yellow wire on Wrangler) at engine controller connector terminal No. 5. If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open Black wire (Black/Yellow wire on Wrangler). Perform VERIFICATION TEST VER-2 .
- Probe Black/Tan wire (Black wire on Wrangler) at engine controller connector terminal No. 11. If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open Black/Tan wire (Black wire on Wrangler). Perform VERIFICATION TEST VER-2 .
- Probe Black/Tan wire (Black wire on Wrangler) at engine controller connector terminal No. 12. If resistance is less than one ohm, reconnect engine controller connector. Test is complete. If resistance is one ohm or more, repair open Black/Tan wire (Black wire on Wrangler). Perform VERIFICATION TEST VER-2 .