DTC Troubleshooting: P0670 (173)
  1. Check for continuity between ECM connector No. 1 terminal No. 75 and body ground.
Is there continuity?
YES -
Go to Step 19 .
NO -
Repair open in the wire between the glow plug control module and ECM connector No. 1 terminal No. 75, then go to Step 24 .
  1. Remove the jumper wire from the glow plug control module.
  1. Reconnect ECM connector No. 1 (96P) and ECM connector No. 2 (58P).
  1. Turn the ignition switch ON (ll).