System malfunction location

• Invalid data received from instrument cluster

Detection condition

• The climate control unit receives error signals from the Instrument cluster for 5s or more

Fail-safe function

Not applicable

Possible cause

• Instrument cluster malfunction

• Climate control unit malfunction

System wiring diagram

Not applicable

Step

Inspection

Action

1

• Perform the instrument cluster DTC inspection using the M-MDS.

  (See DTC INSPECTION [INSTRUMENT CLUSTER].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [INSTRUMENT CLUSTER].)

No

Go to the next step.

2

• Clear the DTC from the climate control unit memory using the M-MDS.

  (See CLEARING DTC [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER)].)

• Perform the climate control unit DTC inspection using the M-MDS.

  (See DTC DISPLAY [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER)].)

• Is the same DTC present?

Yes

Replace the instrument cluster, then go to the next step.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

No

Go to the next step.

3

• Clear the DTC from the climate control unit memory using the M-MDS.

  (See CLEARING DTC [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER)].)

• Perform the climate control unit DTC inspection using the M-MDS.

  (See DTC DISPLAY [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER)].)

• Is the same DTC present?

Yes

Repeat the inspection from Step 1.

• If the malfunction does not recur, go to the next step.

• If the malfunction recurs, replace the climate control unit.

  (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].)

Go to the next step.

No

Go to the next step.

4

• Verify other DTCs displayed.

  (See DTC DISPLAY [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER)].)

• Are any other DTCs output?

Yes

Perform the corresponding DTC inspection.

(See DTC TABLE [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER)].)

No

DTC troubleshooting completed.