Step

Inspection

Action

1

PERFORM CAN MALFUNCTION DIAGNOSIS AND DTC INSPECTION

• Perform the CAN malfunction diagnosis according to the recommendation of FOREWORD [INSTRUMENT CLUSTER] malfunction diagnosis, and if there is no CAN malfunction, perform inspection for DTCs.

  (See DTC INSPECTION [INSTRUMENT CLUSTER].)

• Is the DTC displayed?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [INSTRUMENT CLUSTER].)

No

Go to the next step.

2

VERIFY THE MALFUNCTION SYMPTOM

• Cool down the engine.

• When the ignition is switched ON, does the engine coolant temperature warning light illuminate or flash?

Yes

Go to Step 4.

No

Go to the next step.

3

VERIFY ILLUMINATION OF LOW ENGINE COOLANT TEMPERATURE INDICATOR LIGHT

• Start the engine.

• Monitor the PID ECT using the M-MDS.

• Verify that the low engine coolant temperature indicator light illuminates when the ECT monitor value is 55 °C {131 °F} or more.

• Does the low engine coolant temperature indicator light illuminate?

Yes

Go to the next step.

No

The system is operating normally.

4

INSPECT ECT SENSOR

• Inspect the ECT sensor.

  (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-G 2.5].)

• Is the ECT sensor normal?

Yes

Replace the instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

No

Replace the ECT sensor.

(See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)