1A
DTC P0403: Exhaust Gas Recirculation Control Circuit
NOTE:
Fault finding procedure application conditions for stored DTC:
The DTC is detected with the engine idling.
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 MIL light up
CC0 Short circuit to ground
CC 1 Incoherence
D2 Overheat Does not light
Troubleshooting
Check the connection and condition of the EGR valve connector.
Repair if necessary.
Check the connection and condition of the ECM “C47” connector.
Repair if necessary.
Check EGR valve for operation referring to EGR Valve (Stepper Motor) Inspection:K9K .
Replace the EGR valve if necessary.
Check for 12 V on “C46-4” terminal of the EGR valve connector.
Check the continuity and insulation of the following connections:
Between “C46-1” terminal of EGR valve connector and “C47-5” terminal of ECM connector.
Between “C46-3” terminal of EGR valve connector and “C47-8” terminal of ECM connector.
Repair If necessary. If DTC P0403 is still detected, replace the EGR valve.
If DTC P0403 is still detected, replace the 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.