Engine General Information and Diagnosis: 1A-47
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
HO2S-1 heater power circuit check
1) Disconnect connector from HO2S-1 with ignition switch
turned OFF.
2) Check for proper connection to HO2S-1 at “BLK/WHT”
and “BLK/RED” wire terminals.
3) If wire and connection are OK, measure voltage
between “BLK/WHT” wire terminal and engine ground
with ignition switch turned ON.
Is voltage over 10 V?
Go to Step 3.
“BLK/WHT” wire is open
circuit or shorted to
ground circuit.
3
HO2S-1 heater power circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure resistance between “BLK/WHT” wire terminal
of HO2S-1 connector and “E23-29” terminal of ECM
connector.
Is resistance below 5
:
?
Go to Step 4.
“BLK/WHT” wire is high
resistance circuit.
4
HO2S-1 heater drive circuit check
1) Measure resistance between “C37-46” terminal of ECM
connector and vehicle body ground.
Is resistance infinity?
Go to Step 5.
“BLK/RED” wire is
shorted to ground
circuit.
5
HO2S-1 heater drive circuit check
1) Turn ON ignition switch.
2) Measure voltage between “C37-46” terminal of ECM
connector and vehicle body ground.
Is voltage 0 V?
Go to Step 6.
“BLK/RED” wire is
shorted to power circuit.
6
HO2S-1 heater drive circuit check
1) Connect connector to HO2S-1 with ignition switch turned
OFF.
2) Turn ON ignition switch.
3) Measure voltage between “C37-46” terminal of ECM
connector and vehicle body ground with connector
disconnected from ECM.
Is voltage over 10 V?
Go to Step 7.
“BLK/RED” wire is open
circuit.
Содержание SWIFT RS415 2017
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