DTC U2300:54, U2300:55, U2300:56, U2300:64 [FULL-AUTO AIR CONDITIONER]

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	• Sets the configuration value to the following fixed value ― Country destination: North_America ― PTC heater: Not_Equipped ― Water pump: Without Water Pump
Possible cause	Note • If power from the battery is interrupted, the heater control unit will go into a non-configured state because the memory for the configuration information is erased. If the ignition is switched ON (engine off) at this time, DTC U2300:55 is detected. • 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

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

• Sets the configuration value to the following fixed value

― Country destination: North_America

― PTC heater: Not_Equipped

― Water pump: Without Water Pump

Possible cause

Note

• If power from the battery is interrupted, the heater control unit will go into a non-configured state because the memory for the configuration information is erased. If the ignition is switched ON (engine off) at this time, DTC U2300:55 is detected.

• 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	RECORD THE CAR CONFIGURATION DATA • 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	VERIFY THAT THE SAME DTC IS NOT PRESENT • Clear the DTCs from the memory. (See CLEARING DTC [FULL-AUTO AIR CONDITIONER].) • Perform the climate control unit DTC inspection using the M-MDS. (See DTC DISPLAY [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	INSPECT FOR INSTRUMENT CLUSTER MALFUNCTION • 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	VERIFY THAT THE SAME DTC IS NOT PRESENT • Clear the DTCs from the memory. (See CLEARING DTC [FULL-AUTO AIR CONDITIONER].) • Perform the climate control unit DTC inspection using the M-MDS. (See DTC DISPLAY [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 THAT NO OTHER DTCs ARE PRESENT • Verify other DTCs displayed. • Are any other DTCs output?	Yes	Perform the corresponding DTC inspection.
No	DTC troubleshooting completed.

Step

Inspection

Action

RECORD THE CAR CONFIGURATION DATA

• 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.

VERIFY THAT THE SAME DTC IS NOT PRESENT

• Clear the DTCs from the memory. (See CLEARING DTC [FULL-AUTO AIR CONDITIONER].)

• Perform the climate control unit DTC inspection using the M-MDS. (See DTC DISPLAY [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.

Go to Step 5.

INSPECT FOR INSTRUMENT CLUSTER MALFUNCTION

• 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.

Go to the next step.

VERIFY THAT THE SAME DTC IS NOT PRESENT

• Clear the DTCs from the memory. (See CLEARING DTC [FULL-AUTO AIR CONDITIONER].)

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

(See DTC DISPLAY [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.

VERIFY THAT NO OTHER DTCs ARE PRESENT

• Verify other DTCs displayed.

• Are any other DTCs output?

Yes

Perform the corresponding DTC inspection.

DTC troubleshooting completed.