DTC U200D:11 [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)]

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Note
•  There are two types of front climate control unit, type A and type B.
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Front Climate Control Unit Type A

System malfunction location
•  Front climate control unit circuit voltage (+5V) circuit short to ground
Detection condition
•  Malfunction in wiring harness between front climate control unit circuit voltage (+5V) and each sensor/actuator
Fail-safe function
Not applicable
Possible cause
•  Connector or terminal malfunction
•  Each sensor/actuator malfunction
•  Short to ground in wiring harness between front climate control unit and air intake actuator
•  Short to ground in wiring harness between front climate control unit and front air mix actuator
•  Short to ground in wiring harness between front climate control unit and front airflow mode actuator
•  Short to ground in wiring harness between front climate control unit and solar radiation sensor
•  Front climate control unit malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FRONT CLIMATE CONTROL UNIT CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the front climate control unit connectors.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Are the connector and terminals normal?
Yes
Go to the next step.
No
Repair/replace the connector or terminal.
After repair procedure, go to Step 5.
2
VERIFY CONNECTOR CONDITION
•  Disconnect the following each sensor/actuator connectors.
?  Air intake actuator
?  Front air mix actuator
?  Front airflow mode actuator
?  Solar radiation sensor
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Are the connector and terminals normal?
Yes
Go to the next step.
No
Replace the malfunctioning part.
(See AIR INTAKE ACTUATOR INSTALLATION.)
(See FRONT AIR MIX ACTUATOR REMOVAL/INSTALLATION.)
(See FRONT AIRFLOW MODE ACTUATOR INSTALLATION.)
(See SOLAR RADIATION SENSOR REMOVAL/INSTALLATION.)
After replace procedure, go to Step 5.
3
INSPECT EACH SENSOR/ACTUATOR
•  Inspect the following each sensor/actuator.
?  Air intake actuator
?  Front air mix actuator
?  Front airflow mode actuator
?  Solar radiation sensor
•  Is it normal?
Yes
Go to the next step.
No
Replace the malfunctioning sensor/actuator.
(See AIR INTAKE ACTUATOR INSTALLATION.)
(See FRONT AIR MIX ACTUATOR REMOVAL/INSTALLATION.)
(See FRONT AIRFLOW MODE ACTUATOR INSTALLATION.)
(See SOLAR RADIATION SENSOR REMOVAL/INSTALLATION.)
After replace procedure, go to Step 5.
4
INSPECT EACH SENSOR/ACTUATOR CIRCUIT FOR SHORT TO GROUND
•  Inspect for continuity between the following terminal (wiring harness-side) and body ground:
?  Front climate control unit terminal 1R
•   Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between front climate control unit terminal and each sensor/actuator terminal.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
Go to the next step.
No
Go to the next step.
5
VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN
•  Reconnect the disconnected connectors.
•  Connect the negative battery terminal.
•  Clear the DTC from the climate control unit memory using the M-MDS.
•  Perform the climate control unit DTC inspection using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the front climate control unit.
Go to the next step.
No
Go to the next step.
6
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Verify other DTCs displayed.
•  Are any other DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)
No
DTC troubleshooting completed.


Front Climate Control Unit Type B

System malfunction location
•  Front climate control unit circuit voltage (+5V) circuit short to ground
Detection condition
•  Malfunction in wiring harness between front climate control unit circuit voltage (+5V) and each sensor/actuator
Fail-safe function
Not applicable
Possible cause
•  Connector or terminal malfunction
•  Each sensor/actuator malfunction
•  Short to ground in wiring harness between front climate control unit and air intake actuator
•  Short to ground in wiring harness between front climate control unit and front air mix actuator
•  Short to ground in wiring harness between front climate control unit and front airflow mode actuator
•  Short to ground in wiring harness between front climate control unit and solar radiation sensor
•  Front climate control unit malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FRONT CLIMATE CONTROL UNIT CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the front climate control unit connectors.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Are the connector and terminals normal?
Yes
Go to the next step.
No
Repair/replace the connector or terminal.
After repair procedure, go to Step 5.
2
VERIFY CONNECTOR CONDITION
•  Disconnect the following each sensor/actuator connectors.
?  Air intake actuator
?  Front air mix actuator
?  Front airflow mode actuator
?  Solar radiation sensor
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Are the connector and terminals normal?
Yes
Go to the next step.
No
Replace the malfunctioning part.
(See AIR INTAKE ACTUATOR INSTALLATION.)
(See FRONT AIR MIX ACTUATOR REMOVAL/INSTALLATION.)
(See FRONT AIRFLOW MODE ACTUATOR INSTALLATION.)
(See SOLAR RADIATION SENSOR REMOVAL/INSTALLATION.)
After replace procedure, go to Step 5.
3
INSPECT EACH SENSOR/ACTUATOR
•  Inspect the following each sensor/actuator.
?  Air intake actuator
?  Front air mix actuator
?  Front airflow mode actuator
?  Solar radiation sensor
•  Is it normal?
Yes
Go to the next step.
No
Replace the malfunctioning sensor/actuator.
(See AIR INTAKE ACTUATOR INSTALLATION.)
(See FRONT AIR MIX ACTUATOR REMOVAL/INSTALLATION.)
(See FRONT AIRFLOW MODE ACTUATOR INSTALLATION.)
(See SOLAR RADIATION SENSOR REMOVAL/INSTALLATION.)
After replace procedure, go to Step 5.
4
INSPECT EACH SENSOR/ACTUATOR CIRCUIT FOR SHORT TO GROUND
•  Inspect for continuity between the following terminal (wiring harness-side) and body ground:
?  Front climate control unit terminal 1C
•   Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between front climate control unit terminal and each sensor/actuator terminal.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
Go to the next step.
No
Go to the next step.
5
VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN
•  Reconnect the disconnected connectors.
•  Connect the negative battery terminal.
•  Clear the DTC from the climate control unit memory using the M-MDS.
•  Perform the climate control unit DTC inspection using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the front climate control unit.
Go to the next step.
No
Go to the next step.
6
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Verify other DTCs displayed.
•  Are any other DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)
No
DTC troubleshooting completed.