Suzuki Grand Vitara 2011 Manual page 188

1A-119 Engine General Information and Diagnosis: For Petrol Engine Model
DTC Confirmation Procedure
WARNING
!
• When performing a road test, select a place where there is no traffic or possibility of a traffic
accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out by 2 persons, a driver and a tester, on a level road.
NOTE
Check to make sure that following conditions are satisfied when using this "DTC Confirmation
Procedure".
• Intake air temperature at engine start: –10 °C (14 °F) to 80 °C (176 °F)
• Intake air temperature: –10 °C (14 °F) to 70 °C (158 °F)
• Engine coolant temperature: 70 °C (158 °F) to 150 °C (302 °F)
• Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)
1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and print Freeze Frame Data or write them down using scan tool.
3) Clear DTC using scan tool.
4) Start engine and warm up to normal operating temperature.
5) Operate vehicle with condition as noted freeze frame data for 5 min.
6) Stop vehicle and check DTC and pending DTC.
DTC Troubleshooting
NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to
"Precautions for DTC Troubleshooting: For Petrol Engine Model".
Step
1 Was "Engine and Emission Control System Check"
performed?
2 Is there DTC(s) other than fuel system (DTC P0171 / P0172
/ 2195 / 2196)?
3 Intake system and exhaust system for leakage check
Are intake system and exhaust system in good condition?
4 Fuel pressure check
1) Check fuel pressure referring to "Fuel Pressure Check:
For Petrol Engine Model".
Is check result satisfactory?
5 Fuel injectors and its circuit check
1) Check fuel injectors referring to "Fuel Injector Inspection:
For Petrol Engine Model in Section 1G".
Is check result satisfactory?
6 Visual inspection
1) Check MAF sensor and air intake system.
• Objects which block measuring duct and resistor of
MAF sensor.
• Other air flow which does not pass MAF sensor.
Are they in good condition?
Action Yes
Go to Step 2.
Go to applicable DTC
diag. flow.
Go to Step 4.
Go to Step 5.
Go to Step 6.
Go to Step 7.
No
Go to "Engine and
Emission Control
System Check: For
Petrol Engine Model".
Go to Step 3.
Repair or replace
defective part.
Repair or replace
defective part.
Faulty injector(s) or its
circuit.
Repair or replace
defective part.