System malfunction location

• U2300:54: Configuration error (data not received)

• U2300:55: Configuration error (not configured)

• U2300:56: Configuration error (ineffective/non-interchangeable data read)

• U2300:64: Configuration error (error value read)

Detection condition

• Climate control unit detects configuration data not record or data error

Fail-safe function

• Sets the configuration value to the fixed value

Possible cause

NOTE:

• If power from the battery is interrupted, the climate control unit will go into a non-configured state because the memory for the configuration information is erased.

• Normally, the configuration is re-performed within 6 s after the ignition is switched ON (engine off).

• After performing the configuration, DTC U2300:55 will be cleared if the ignition is switched ON (engine off) after the ignition is switched off.

• Module configuration procedure was not completed properly

• Correct data cannot be received from instrument cluster

• Climate control unit malfunction

System wiring diagram

Not applicable

Step

Inspection

Action

1

• Switch the ignition ON (engine off) and wait for 6 s or more.

• Switch the ignition off.

• Switch the ignition ON (engine off).

Go to the next step.

2

• Clear the DTCs from the memory.

  (See CLEARING DTC [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)

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

  (See DTC DISPLAY [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)

• Are the same DTCs present?

Yes

Repeat the inspection from Step 1.

If the malfunction recurs, go to the next step.

No

Go to Step 5.

3

• Switch the ignition off.

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

  (See DTC INSPECTION [INSTRUMENT CLUSTER].)

• Are any DTCs present?

Yes

Go to applicable DTC inspection.

(See DTC TABLE [INSTRUMENT CLUSTER].)

After repairing the instrument cluster, perform the instrument cluster configuration.

(See INSTRUMENT CLUSTER CONFIGURATION (USING AS-BUILT DATA).)

Then go to the next step.

No

Go to the next step.

4

• Clear the DTCs from the memory.

  (See CLEARING DTC [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)

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

  (See DTC DISPLAY [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)

• Are the same DTCs 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 [FULL-AUTO AIR CONDITIONER].)

Go to the next step.

No

Go to the next step.

5

• Verify other DTCs displayed.

  (See DTC DISPLAY [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)

• Are any other DTCs output?

Yes

Perform the corresponding DTC inspection.

(See DTC TABLE [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)

No

DTC troubleshooting completed.