DTC P0116 [MZR-CD (RF Turbo)]


DTC P0116	Engine coolant temperature (ECT) sensor range/performance problem
DETECTION CONDITION	• The PCM monitors the input signal from the engine coolant temperature sensor. If the difference between the maximum and the minimum value of the ECT is less than 3 °C {5.4 °F}, the PCM determines that there is a malfunction in the engine coolant temperature sensor characteristic. Diagnostic support note • The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM. • PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• ECT sensor malfunction • Connector or terminal malfunction • PCM malfunction


STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related service repair information availability. • Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT? • Connect the WDS or equivalent to the DLC-2. • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine and warm it up completely. • Is the PENDING CODE for this DTC present?	Yes	Go to the next step.
3		No	Intermittent concern exists. Perform the "INTERMITTENT CONCERN TROUBLESHOOTING". (See INTERMITTENT CONCERN TROUBLESHOOTING [MZR-CD (RF Turbo)].)
4	INSPECT ECT SENSOR CONNECTOR FOR POOR CONNECTION • Turn the engine switch off. • Disconnect the ECT sensor connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 8.
4		No	Go to the next step.
5	INSPECT ECT SENSOR • Inspect the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [MZR-CD (RF Turbo)].) • Is there any malfunction?	Yes	Replace the ECT sensor, then go to Step 8.
5		No	Go to the next step.
6	INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the engine switch off. • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 8.
6		No	Go to the next step.
7	COMPARE ECT PID VALUE • Prepare a new ECT sensor. • Clear the DTC from the PCM memory using the WDS or equivalent. • Connect the ECT sensor connector to the new ECT sensor without installing to the engine. • Turn the engine switch to the ON position and record the ECT PID value. • Replace the malfunctioning ECT sensor with new one. • Start the engine and wait for 5 min. • Record the ECT PID value. • Is the difference between ECT PID values more than 3°C {5.4 °F}?	Yes	Go to the next step.
7		No	Inspect the thermostat. • If thermostat is normal, go to the next step. • If thermostat is not normal, replace thermostat, then go to the next step
8	VERIFY TROUBLESHOOTING OF DTC P0116 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine and warm it up completely. • Is the PENDING CODE for this DTC present?	Yes	Replace the PCM, then go to the next step.
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE • Perform the Repair Verification Drive Mode. (See OBD DRIVE MODE [MZR-CD (RF Turbo)].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZR-CD (RF Turbo)].)
9		No	DTC troubleshooting completed.