DTC Troubleshooting: P0670 (173)
DTC P0670:
 Glow Plug Control Module Circuit Open (Without DPF System)
NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information.
  1. Turn the ignition switch ON (II).
  1. Clear the DTC with the HDS.
  1. Do the GLOW ON/OFF in the INSPECTION MENU with the HDS.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0670 indicated?
YES -
Go to Step 5 .
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the glow plug control module and the ECM.■
  1. Turn the ignition switch OFF, and wait 2 minutes.
  1. Disconnect ECM connector No. 2 (58P).
  1. Turn the ignition switch ON (II).
  1. Measure voltage between ECM connector No. 2 terminal No. 52 and body ground.
Is there battery voltage?
YES -
Go to Step 19 .
NO -
Go to Step 9 .
  1. Turn the ignition switch OFF.