Engine General Information and Diagnosis: 1A-94
DTC P0117: Engine Coolant Temperature Circuit Low
S5JB0A1104027
Wiring Diagram
Refer to “DTC P0116: Engine Coolant Temperature Circuit Range / Performance: ”.
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine and run it for 10 sec. or more.
4) 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: ”.
10
Ground circuit check
1) Remove ECM from its bracket with ECM connectors
connected.
2) Measure resistance between “C37-57” terminal of ECM
connector and vehicle body ground.
Is resistance below 3
Ω
?
“GRY/GRN” wire is high
resistance circuit.
Poor “C37-57”
connection.
Faulty ECM ground
circuit.
If circuit is OK,
substitute a known-
good ECM and recheck.
11
ECT sensor check
1) Check ECT sensor according to “Engine Coolant
Temperature (ECT) Sensor Inspection: in Section 1C”.
Is it in good condition?
Substitute a known-
good ECM and recheck.
Replace ECT sensor.
Step
Action
Yes
No
DTC detecting condition
Trouble area
DTC will be set when all of following conditions are detected for
0.5 seconds continuously.
• Engine is running
• Voltage of ECT sensor output is less than specified value
(High engine coolant temperature (low voltage / low resistance))
(1 driving cycle detection logic)
• ECT sensor circuit
• ECT sensor
• ECM
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
ECT sensor and its circuit check
1) Connect scan tool with ignition switch turned OFF.
2) Turn ON ignition switch.
3) Check engine coolant temp. displayed on scan tool.
Is 130
°
C (266
°
F) indicated?
Go to Step 3.
Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection: in Section
00”.
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