1A
DTC P0487: Exhaust Gas Recirculation Throttle Position Control Circuit
NOTE:
Priority when dealing with a number of DTCs:
If DTC P0487 and DTC P0641 are detected, deal with DTC P0641 Sensor Reference Voltage 1 Circuit/Open first.
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 0 Open circuit or short circuit to ground MIL light up
CC 1 Short circuit to 12 V
Troubleshooting
Check the connection and condition of the EGR valve connector.
Repair if necessary.
Check the condition and connection of the ECM “C47” connector.
Repair if necessary.
Check for 5 V on “C46-4” terminal of the EGR valve connector.
Check for earth on “C46-5” terminal of the EGR valve connector.
Repair if necessary.
Check the continuity and insulation of the following connections:
• Between “C47-17” terminal of the ECM connector and “C46-4” terminal of the EGR valve connector.
• Between “C47-27” terminal of the ECM connector and “C46-6” terminal of the EGR valve connector.
• Between “C47-37” terminal of the ECM connector and “C46-5” terminal of the EGR valve connector.
Repair if necessary. If DTC P0487 is still detected, replace the EGR valve.
If DTC P0487 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.