1A
DTC P0380 / P0670: Glow Plug / Heater Circuit Malfunction / Glow Plug Module Control Circuit
NOTE:
DTC P0380 indicated only with SUZUKI scan tool.
DTC P0670 indicated only with generic scan tool.
This DTC only handles the fault finding with an open circuit.
Wiring Diagram
For wiring circuit and connector number, refer to “K9K Engine (Type 5)” in A-4 Engine Control System Circuit Diagram .
Detecting Condition
Status displayed on SUZUKI scan tool Detecting condition Indicator / Warning light operation
CO Open circuit Does not light
Troubleshooting
Check the connection and condition of the pre-heating unit power supply fuse.
Replace the fuse if necessary.
Check the condition and connection of the pre-heating unit connector.
Repair if necessary.
Check the condition and connection of the glow plug connectors.
Repair if necessary.
Check the condition and connection of the ECM “C48” connector.
Repair if necessary.
Check glow plugs for resistance referring to Glow Plug Inspection:K9K .
Replace the glow plug if necessary.
Check for 12 V battery feed on “C83-7” terminal of the pre-heating unit connector.
Repair if necessary.
Check the continuity and insulation of the following connections:
Between “C48-10” terminal of ECM connector and “C83-3” terminal of pre-heating unit connector.
Between “C48-18” terminal of ECM connector and “C83-1” terminal of pre-heating unit connector.
Repair if necessary. If DTC P0380 is still detected, replace the pre-heating unit.
If DTC P0380 is still detected, replace ECM.
After Repair
Deal with any faults detected by SUZUKI scan tool.
Clear the DTC.
Carry out a road test followed by another check with the SUZUKI scan tool.