Suzuki Ignis Service Manual page 3311

6-110 ENGINE GENERAL INFORMATION AND DIAGNOSIS
TROUBLESHOOTING
Step
1 Was "Engine and Emission Control System
Check" performed?
2 Is there DTC(s) other than "P0171" and "P0172"? Go to applicable DTC
3 Check intake system and exhaust system for
leakage.
Are intake system and exhaust system in good
condition?
4 Check fuel pressure referring to "Table B-3 Fuel
Pressure Check" in this section.
Is check result satisfactory?
5 Check fuel injectors referring to "Fuel injector
inspection" in Section 6E1.
Is check result satisfactory?
6 Check fuel level sensor.
Is DTC P0463 displayed?
7 Check MAF sensor referring to Step 2 and 3 of
"DTC P0101 Mass Air Flow Circuit Range/Perfor-
mance".
Is check result satisfactory?
8 Check ECT sensor referring to Step 3 and 4 of
"DTC P0118 Engine Coolant Temperature Cir-
cuit High".
Is check result satisfactory?
9 Check HO2S–1 referring to Step 2 of "DTC
P0131 O2 Sensor (HO2S) Circuit Low Voltage
(Sensor-1)".
Is check result satisfactory?
Action Yes
Go to Step 2.
flow table.
Go to Step 4.
Go to Step 5.
Go to Step 6.
Go to Step 7.
Go to Step 8.
Go to Step 9.
Substitute a known-good
ECM and recheck.
No
Go to "Engine and Emis-
sion Control System
Check" in this section.
Go to Step 3.
Repair or replace.
Repair or replace.
Faulty injector(s) or its
circuit.
Faulty fuel level sensor
or its circuit.
Faulty MAF sensor or its
circuit.
Faulty ECT sensor or its
circuit.
Faulty HO2S–1 or its cir-
cuit.