1A
DTC P0235: Turbo Pressure Sensor Circuit Malfunction
NOTE:
If DTC P0235 and DTC P0641 are detected, deal with P0641 Sensor Reference Voltage 1 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
D1 Parameter at limit minimum Does not light
D2 Parameter at limit maximum
D3 Below minimum threshold Injection warning light (gravity 1 fault) light up
D4 Above maximum threshold
D5 Trim minimum for high fuel
D6 Trim maximum for high fuel
D7 Trim minimum for low fuel
Troubleshooting for D1: Parameter at Limit Minimum, D2: Parameter at Limit Maximum, D3: Below Minimum Threshold and D4: Above Maximum Threshold
Check the connection and condition of the boost pressure sensor connector.
Repair if necessary.
Check the connection and condition of the ECM “C47” connector.
Repair if necessary.
Check for the 5 V after ignition feed on “C47-16” terminal of boost pressure sensor connector.
Repair if necessary.
Check for ground on “C47-36” terminal of the boost pressure sensor.
Check for insulation, continuity and absence of interference resistance of the connections:
• Between “C49-1” terminal of boost pressure sensor connector and “C47-16” terminal of ECM connector
• Between “C49-3” terminal of boost pressure sensor connector and “C47-26” terminal of ECM connector
• Between “C49-2” terminal of boost pressure sensor connector and “C47-36” terminal of ECM connector
Repair if necessary. If DTC P0235 is still detected, replace the boost pressure sensor.
If DTC P0235 is still detected, replace the ECM.
Troubleshooting for D5: Trim Minimum for High Fuel, D6: Trim Maximum for High Fuel and D7: Trim Minimum for Low Fuel
Visually check that the turbocharger circuit sealing.
Repair if necessary.
Remove the air supply ducts and check that they are not blocked.
Repair if necessary.
Check the condition of the boost pressure sensor connector and replace it if necessary.
With engine stationary, check the consistency between the barometric pressure and boost pressure.
With the engine stopped, the pressure should be approximately the same between the two sensors.
If the valves are very different, replace the boost pressure sensor.
Check the turbocharger (wastegate pneumatic actuation circuit).
Repair if necessary.
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.