Dtc P0297: Vehicle Overspeed Condition Malfunction - Suzuki GRAND VITARA 2005 Service Manual

Troubleshooting for 2.DEF: Pressure too high
Check the boost pressure sensor connections.
Check the connections of the boost pressure control solenoid valve.
Check the ECM connections.
Repair if necessary.
Check the conformity of the turbocharging pressure signal. (Refer to "Turbo Pressure" on Data List of SUZUKI
scan tool).
Make sure the turbocharging limit solenoid valve is not blocked open:
• With ignition switch OFF, disconnect the inlet and outlet hoses from the solenoid valve.
• Connect a vacuum pump to the inlet union and apply a vacuum.
• If the vacuum pressure is not maintained: replace the boost pressure control solenoid valve.
Check that the turbocharger control rod has not seized:
• With the engine stopped, make sure the turbocharger control shaft is in the rest position.
• Apply a vacuum of 70 – 90 kPa (0.7 – 0.9 kg/cm
control diaphragm.
• If the diaphragm holds the vacuum pressure, check the movement and setting of the turbocharger control rod
referring to "Turbocharger Assembly Inspection: in Section 1D".
If the control rod is seized, replace the turbocharger.
If the fault persists, perform Test 5 and 6 of Fault Finding-Tests referring to "Test 5: Variable geometry
turbocharger control: " and "Test 6: Rotating part of a turbocharger: ".

DTC P0297: Vehicle Overspeed Condition Malfunction

CAUTION
!
• The fault is present because the vehicle was running while diesel particulate filter after-sales
regeneration was in progress.
The vehicle speed should be zero during the regeneration.
Carry out an after sales regeneration referring to "Diesel Particulate Filter After-sales Regeneration
Procedure: in Section 1C".
DO NOT RUN THE VEHICLE.
If the fault is still present, substitute a known-good ECM and recheck.
• The parameters must be reinitialised after any procedure is carried out on the diesel particulate
filter.
Use command "Initialize Diesel PF data" on SUZUKI scan tool, and diesel particulate filter after-
sales regeneration referring to "Diesel Particulate Filter After-sales Regeneration Procedure: in
Section 1C" or "Diesel Particulate Filter Removal and Installation: in Section 1K".
NOTE
• Conditions for applying fault finding procedures to stored faults:
The fault becomes present during an diesel particulate filter after-sales regeneration with the
SUZUKI scan and a non negligible speed.
• If the fault is present, the diesel particulate filter after-sales regeneration in progress fails.
Engine General Information and Diagnosis:
2 , 9.9 – 12.8 psi), to the hose connecting the turbocharger
1A-47
S5JB0B1104104