SFI SYSTEM(w/ EGR System), Diagnostic DTC:P0116
| DTC Code | DTC Name |
|---|---|
| P0116 | Engine Coolant Temperature Circuit Range / Performance Problem |
DESCRIPTION
Refer to DTC P0115 Click here.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0116 | When either of the following conditions is met (2 trip detection logic):
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MONITOR DESCRIPTION
- Engine Coolant Temperature Sensor Cold Start Monitor
The monitor runs when the engine is started cold. If the change in engine coolant temperature sensor output until the engine warmed up completely is less than the threshold, it is determined that a malfunction has occurred in the engine coolant temperature sensor. When this is detected in 2 consecutive driving cycles, the MIL is illuminated and the DTC is set.
- Engine Coolant Temperature Sensor Soak Monitor
The ECM compares the engine coolant temperature when the warmed engine is stopped and when the engine is started on the next trip when more than 5 hours has elapsed since the engine was stopped. If the change in engine coolant temperature sensor output is less than the threshold, it is determined that a malfunction has occurred in the engine coolant temperature sensor. When this is detected in 2 consecutive driving cycles, the MIL is illuminated and the DTC is set.
MONITOR STRATEGY
| Frequency of Operation | Once per driving cycle |
CONFIRMATION DRIVING PATTERN
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Connect the intelligent tester to the DLC3.
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Turn the power switch on (IG) and turn the tester on.
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Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Coolant Temp.
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Check that the engine coolant temperature is 60°C (140°F) or less.
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Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).
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Turn the power switch off and wait for 30 seconds.
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Turn the power switch on (IG) and turn the tester on [A].
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Put the engine in inspection mode (maintenance mode) Click here.
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Start the engine and idle it for 5 minutes or more [B].
Tech Tips
If the engine coolant temperature does not change by 5°C (9°F) or higher, the engine coolant temperature sensor is malfunctioning. It is not necessary to continue this procedure.
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Enter the following menus: Powertrain / Engine and ECT / DTC / Pending.
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Read the pending DTC [C].
Tech Tips
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If a pending DTC is output, the system is malfunctioning.
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If a pending DTC is not output, perform the following procedure.
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Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
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Input the DTC: P0116.
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Check the DTC judgment result.
Tester Display Description NORMAL
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DTC judgment completed
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System normal
ABNORMAL
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DTC judgment completed
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System abnormal
INCOMPLETE
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DTC judgment not completed
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Perform driving pattern after confirming DTC enabling conditions
N/A
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Unable to perform DTC judgment
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Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
Tech Tips
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If the judgment result shows NORMAL, the system is normal.
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If the judgment result shows ABNORMAL, the system has a malfunction.
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If the judgment result shows INCOMPLETE or N/A, perform steps [D] and [E].
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Drive the vehicle at 40 km/h (25 mph) or more for a total of 5 minutes or more [D].
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Tech Tips
In the event of the drive pattern being interrupted (possibly due to factors such as traffic conditions), the drive pattern can be resumed.
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Check the DTC judgment result again [E].
Tech Tips
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If the judgment result shows NORMAL, the system is normal.
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If the judgment result shows ABNORMAL, the system has a malfunction.
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CAUTION / NOTICE / HINT
Tech Tips
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If any of DTCs P0115, P0117 or P0118 is set simultaneously with DTC P0116, the engine coolant temperature sensor may have an open or a short circuit. Troubleshoot those DTCs first.
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Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
PROCEDURE
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CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0116)
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Connect the intelligent tester to the DLC3.
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Turn the power switch on (IG).
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Turn the tester on.
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Enter the following menus: Powertrain / Engine and ECT / DTC.
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Read the DTCs.
Result Result Proceed to DTC P0116 is output A DTC P0116 and other DTCs are output B Tech Tips
If any DTCs other than P0116 are output, troubleshoot those DTCs first.
B 
GO TO DTC CHART Click here
A 
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INSPECT WATER INLET WITH THERMOSTAT SUB-ASSEMBLY
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Remove the water inlet with thermostat sub-assembly Click here.
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Measure the valve opening temperature of the water inlet with thermostat sub-assembly.
Standard value 80 to 84°C (176 to 183°F) Tech Tips
In addition to the above check, confirm that the valve is completely closed when the temperature is below the standard.
OK
REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here
NG
REPLACE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY Click here
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