1A-104 Engine General Information and Diagnosis:
DTC Troubleshooting
NOTE:
• Before performed trouble shooting, be sure to read the “Precautions of ECM Circuit Inspection: ”.
• When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors referring to “Inspection of ECM and Its Circuits: ”.
• Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” and
confirm that the trouble has been corrected.
Step
Action
Yes
No
1
Was “Engine and Emission Control System Check”
performed?
Go to Step 2.
Go to “Engine and
Emission Control
System Check: ”.
2
Is there DTC(s) other than fuel system (DTC P0171 /
P0172)?
Go to applicable DTC
diag. flow.
Go to Step 3.
3
Intake system and exhaust system for leakage check
Are intake system and exhaust system in good condition?
Go to Step 4.
Repair or replace
defective part.
4
Fuel pressure check
1) Check fuel pressure referring to “Fuel Pressure Check: ”.
Is check result satisfactory?
Go to Step 5.
Repair or replace
defective part.
5
Fuel injectors and its circuit check
1) Check fuel injectors referring to “Fuel Injector Inspection:
Is check result satisfactory?
Go to Step 6.
Faulty injector(s) or its
circuit.
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 the MAF sensor.
Are they in good condition?
Go to Step 7.
Repair or replace
detective part.
7
MAF sensor for performance check
1) With ignition switch turned OFF, install scan tool.
2) Start engine and warm up to normal operating
temperature.
3) Check MAF value using scan tool (Refer to “Scan Tool
Data: ” for normal value.).
Is each value within specified range?
Go to Step 8.
Go to “DTC P0101:
Mass Air Flow Circuit
Range / Performance: ”.
8
ECT sensor for performance check
1) Check ECT sensor referring to Step 3 and 4 of “DTC
P0118: Engine Coolant Temperature Circuit High: ”.
Is check result satisfactory?
Go to Step 9.
Faulty ECT sensor or its
circuit.
9
HO2S-1 for performance check
1) Check HO2S-1 referring to Step 3 of “DTC P0131 /
P0132: O2 Sensor (HO2S) Circuit Low Voltage / High
Voltage (Sensor-1): ”.
Is check result satisfactory?
Substitute a known-
good ECM and recheck.
Faulty HO2S-1 or its
circuit.
Содержание SWIFT RS415 2017
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