Matthew Booth
P1677 Glow Plug Controller Fault
- The communication between ECU and glow plug is faulty.
- Check the communication line between ECU and glow plug.
- Check the glow plug wiring harness.
- Check the resistance of glow plug: below 1 ohm.
- Check the glow plug relay.
- Check the ECU wiring harness.
- Check the ECU pin #113 for short to ground.
- Replace the ECU if required.
Message Thread 
Ssangyong Rexton 2.7 CDi 2004 - Fault code P1677 c/f control 2 volts low - Fixed # - Eurwyn Evans December 8, 2010, 10:03 pm
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on December 9, 2010, 2:55 pm, in reply to "