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LOW ENGINE COOLANT TEMPERATURE INDICATOR LIGHT/HIGH ENGINE COOLANT TEMPERATURE WARNING LIGHT ILLUMINATES OR FLASHES CONTINUOUSLY [INSTRUMENT CLUSTER]

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2016 – MX-5 – Body and Accessories

LOW ENGINE COOLANT TEMPERATURE INDICATOR LIGHT/HIGH ENGINE COOLANT TEMPERATURE WARNING LIGHT ILLUMINATES OR FLASHES CONTINUOUSLY [INSTRUMENT CLUSTER]

NOTE:

  • If there is any vehicle malfunction complaint lodged by a customer, perform FOREWORD [INSTRUMENT CLUSTER] malfunction diagnosis according to the troubleshooting procedure. (See FOREWORD [INSTRUMENT CLUSTER].)

Possible cause

  • ECT sensor malfunction

  • Instrument cluster malfunction

Diagnostic Procedure

Step

Inspection

Action

1

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

  • Switch the ignition ON (engine on).

  • 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

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 2.0].)

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