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DTC P0118:00 [PCM (SKYACTIV-X)]

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Outline

System malfunction location	ECT sensor No.1 circuit high input
Detection condition	•  The PCM monitors the ECT sensor No.1 signal. If the PCM detects that the ECT sensor No.1 voltage at the PCM terminal 1AH is above 4.94 V for 5 s, the PCM determines that the ECT sensor No.1 circuit has a malfunction.
Fail-safe	•  Fully open the coolant switching valve (CSV).
Possible cause	•  ECT sensor No.1 connector or terminals malfunction •  ECT sensor No.1 malfunction •  PCM connector or terminals malfunction •  Short to power supply in ECT sensor No.1 signal circuit •  Open circuit in any of the following ECT sensor No.1 circuits. ―  Signal circuit ―  Ground circuit •  PCM malfunction

Diagnostic Procedure

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION •  Record the freeze frame data/snapshot data. Note •  Recording can be facilitated using the screen capture function of the PC.	—	Go to the next step.
2	VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY •  Verify related Service Bulletins, on-line repair information, or Service Information availability. •  Is any related Information available?	Yes	Perform repair or diagnosis according to the available information. •  If the vehicle is not repaired, go to the next step.
		No	Go to the next step.
3	INSPECT ECT SENSOR No.1 CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	DETERMINE IF ECT SENSOR No.1 OR WIRING HARNESS MALFUNCTION •  Verify that the ECT sensor No.1 connector is disconnected. •  Access the ECT_VOLT PID using the M-MDS. (See PID/DATA MONITOR INSPECTION.) •  Connect a jumper wire between ECT sensor No.1 terminals A and B (wiring harness-side). •  Verify the ECT_VOLT PID value. •  Is the voltage 4.94 V or below?	Yes	Replace the ECT sensor No.1 and perform the repair completion verification. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
		No	Go to the next step.
5	INSPECT PCM CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
6	INSPECT ECT SENSOR No.1 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY •  Inspect the applicable circuit for a short to power supply. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
7	INSPECT ECT SENSOR No.1 SIGNAL CIRCUIT AND GROUND CIRCUIT FOR OPEN CIRCUIT •  Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED •  Install/connect the part removed/disconnected during the troubleshooting procedure. •  Clear the DTC recorded in the memory. (See CLEARING DTC.) •  Replicate the vehicle conditions at the time the DTC was detected using the following procedure. ―  Perform the KOEO or KOER self test. (See DTC INSPECTION.) •  Perform the DTC inspection for the PCM. (See DTC INSPECTION.) •  Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. •  If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
		No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTCs DISPLAYED •  Perform the DTC inspection. (See DTC INSPECTION.) •  Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
		No	DTC troubleshooting completed.