1A-74 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
DTC check
1) With ignition switch turned OFF, install scan tool to DLC.
2) Turn ON ignition switch and check DTC with scan tool.
Is DTC P0118 displayed?
Go to “DTC P0118:
Engine Coolant
Temperature Circuit
High: ”.
Go to Step 3.
3
Engine coolant temp. check
1) Turn ON ignition switch and check engine coolant temp.
displayed on scan tool.
2) Warm up engine to normal operating temp. and check
engine coolant temp. displayed on scan tool.
Does engine coolant temp. vary more than 1
q
C (1
q
F) and
rise higher than 70
q
C (158
q
F)?
Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection: in Section
00”.
Go to Step 4.
4
Thermostat check
Is there a symptom due to thermostat remaining open (it
takes a long time before vehicle heater becomes effective or
before engine is warmed to normal operating temp., etc.)?
Check thermostat
referring to “Thermostat
Inspection: in Section
1F”.
Go to Step 5.
5
Wire harness check
1) Disconnect ECT sensor connector with ignition switch
turned OFF.
2) Check for proper connection to ECT sensor connector at
“ORN” and “LT GRN” wire terminals.
3) If OK, then with ignition switch ON, measure voltage
between “LT GRN” wire terminal of ECT sensor
connector and vehicle body ground.
Is measured voltage applied to “LT GRN” wire terminal about
4 – 6 V?
Go to Step 9.
Go to Step 6.
I2RH01110067-
Содержание SWIFT RS415 2017
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