1A
DTC P2120: Pedal Position Sensor 2 Circuit
NOTE:
• Priority when dealing with a number of DTCs:
If DTC P2120 and DTC P0651 are detected, deal with P0651 Sensor Reference Voltage 2 Circuit/Open first.
• If DTC P2120 is detected, engine speed maintained above 1000 rpm and engine performance reduced to 75%.
• If DTC P2120 and DTC P0225 are detected, engine speed fixed at 1300 rpm.
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 Injection warning light (gravity 1 fault) light up
CC 1 Short circuit to 12 V
Troubleshooting for CO 0: Open Circuit or Short Circuit to Ground
Check the connection and condition of the APP sensor connector.
Repair if necessary.
Check the connection and condition of the ECM “E17” connector.
Repair if necessary.
Check pedal position sensor for resistance referring to APP Sensor Inspection:K9K .
Replace pedal position sensor if necessary.
Check the following:
• Check for 5 V on “E97-2” terminal of the pedal position sensor connector
• Check for earth on “E97-6” terminal of the pedal position sensor connector
Repair if necessary.
Disconnect the ECM “E17” connector and the APP sensor connector.
Check the insulation from earth on “E17-21” terminal of ECM connector.
Repair if necessary.
Check the continuity of the connection:
• Between “E97-1” terminal of APP sensor connector and “E17-21” terminal of ECM connector
Repair if necessary.
If DTC P2120 is still detected, replace the ECM.
Troubleshooting for CC 1: Short Circuit to 12 V
Check the connection and condition of the APP sensor connector.
Repair if necessary.
Check the connection and condition of the ECM “E17” connector.
Repair if necessary.
Check pedal position sensor for resistance referring to APP Sensor Inspection:K9K .
Replace pedal position sensor if necessary.
Disconnect the ECM “E17” connector and the APP sensor connector.
Check the insulation from the 12 V feed on “E17-15” terminal and “E17-21” terminal of ECM connector.
Repair if necessary.
Check the following:
• Check for 5 V on “E97-2” terminal of the pedal position sensor connector
• Check for earth on “E97-6” terminal of the pedal position sensor connector
Repair if necessary.
Check the continuity of the connections:
• Between “E97-1” terminal of APP sensor connector and “E17-21” terminal of ECM connector
• Between “E97-2” terminal of APP sensor connector and “E17-15” terminal of ECM connector
• Between “E97-6” terminal of APP sensor connector and “E17-27” terminal of ECM connector
Repair if necessary.
Disconnect “E17” connector from the ECM and the connector from the APP sensor.
Check for insulation between “E17-15” terminal and “E17-21” terminal of ECM connector.
Repair if necessary.
If DTC P2120 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.