DESCRIPTION

ECT sensor No.2 circuit range/performance problem

DETECTION CONDITION

Determination conditions

• When the ECT sensor No.2 detected temperature is approx. 12.1 °C {21.8 °F} higher than the IAT sensor No.1, or the ECT sensor No.2 detected temperature is approx. −14.3 °C {−25.7 °F} less than the IAT sensor No.1 with the ignition switched ON, the PCM detects a circuit range/performance problem.

Preconditions

• Before starting the engine, leave the vehicle with the engine turned off for 6 hours or more.

• The following DTCs are not detected:

• IAT sensor No.1: P0112:00, P0113:00

• ECT sensor No.2: P2184:00, P2185:00

Drive cycle

• 2

Self test type

• CMDTC self test

Sensor used

• IAT sensor No.1

• ECT sensor No.2

FAIL-SAFE FUNCTION

• Not applicable

VEHICLE STATUS WHEN DTCs ARE OUTPUT

• Illuminates check engine light.

POSSIBLE CAUSE

• ECT sensor No.2 connector or terminals malfunction

• MAF sensor/IAT sensor No.1 connector or terminals malfunction

• PCM connector or terminals malfunction

• ECT sensor No.2 malfunction

• IAT sensor No.1 malfunction

• PCM malfunction

Item

Definition

Unit

Condition/Specification

ECT2_V

ECT sensor No.2 voltage

V

Ignition switched ON (engine off)

• ECT is 29 °C {84 °F}: Approx. 2.65 V

Idle (after warm up)

• ECT is 88 °C {190 °F}: Approx. 0.71 V

IAT

Intake air temperature (No.1) input from IAT sensor No.1

°C, °F

• Displays IAT (No.1)

IAT sensor No.1 voltage

V

• IAT is 60 °C {140 °F}: Approx. 1.13 V

• IAT is 63 °C {145 °F}: Approx. 1.07 V

• IAT is 65 °C {149 °F}: Approx. 1.01 V

STEP

INSPECTION

RESULTS

ACTION

1

• Verify related Service Bulletins and/or on-line 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.

No

Go to the next step.

2

NOTE:

• Recording can be facilitated using the screen capture function of the PC.

• Record the FREEZE FRAME DATA/snapshot data on the repair order.

—

Go to the next step.

3

• Start the engine.

• Access the following PIDs using the M-MDS:

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• ECT2_V

• IAT

• Does the PID value fluctuate when the following connectors are shaken?

• ECT sensor No.2

• IAT sensor No.1

• PCM

Yes

Repair or replace the applicable connector parts.

Go to the troubleshooting procedure to perform the procedure from Step 3.

No

Go to the troubleshooting procedure to perform the procedure from Step 1.

STEP

INSPECTION

RESULTS

ACTION

1

• Inspect the ECT sensor No.2.

  (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-G 2.0].)

• Is there any malfunction?

Yes

Replace the ECT sensor No.2, then go to Step 3.

(See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

2

• Inspect the IAT sensor No.1.

  (See INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [SKYACTIV-G 2.0].)

• Is there any malfunction?

Yes

Replace the MAF sensor/IAT sensor No.1, then go to the next step.

(See MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.1 REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

3

• Always reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

  (See CLEARING DTC [PCM (SKYACTIV-G 2.0)].)

• Implement the repeatability verification procedure.

  (See Repeatability Verification Procedure.)

• Perform the Pending Trouble Code Access Procedure.

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• Is the PENDING CODE for this DTC present?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the PCM.

  (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

Go to the next step.

No

Go to the next step.

4

• Is any other DTC or pending code stored?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [PCM (SKYACTIV-G 2.0)].)

No

DTC troubleshooting completed.