DTC 59 [FULL-AUTO AIR CONDITIONER]

id0702c1803800

DTC 59

Airflow mode actuator (motor lock) (past malfunction)
DETECTION CONDITION
•  Motor lock of the airflow mode actuator was detected once or more.
POSSIBLE CAUSE
•  Airflow mode actuator malfunction
•  A/C unit (airflow mode link and airflow mode crank) malfunction
•  Open or short circuit in wiring harness between climate control unit and airflow mode actuator.
•  Climate control unit malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
INSPECT AIRFLOW MODE ACTUATOR CONNECTOR CONDITION
•  Turn the ignition switch to the LOCK position.
•  Disconnect the airflow mode actuator connector.
•  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 8.
2
INSPECT AIRFLOW MODE ACTUATOR
•  Inspect the airflow mode actuator.
•  Is the airflow mode actuator normal?
Yes
Go to the next step.
No
Replace the airflow mode actuator.
(See AIRFLOW MODE ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
After replacement, go to Step 8.
3
INSPECT AIRFLOW MODE LINK
•  Operate the airflow mode link manually.
•  Does the airflow mode link operate smoothly?
Yes
Go to the next step.
No
Replace the airflow mode link and airflow mode crank.
After replacement, go to Step 8.
4
INSPECT CLIMATE CONTROL UNIT CONNECTOR CONDITION
•  Disconnect the climate control unit connector.
•  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 malfunctioning vehicle wiring harness, connector, or terminal.
After repair procedure, go to Step 8.
5
INSPECT AIRFLOW MODE ACTUATOR FOR SHORT CIRCUIT TO GROUND
•  Inspect the wiring harness for continuity between the airflow mode actuator connector and body ground.
―  Terminal B—body ground
―  Terminal C—body ground
Note
•  Inspect the continuity while shaking the wiring harness between the airflow mode actuator and climate control unit.
•  Is there continuity?
Yes
Repair/replace the malfunctioning vehicle wiring harness.
After repair procedure, go to Step 8.
No
Go to the next step.
6
INSPECT AIRFLOW MODE ACTUATOR FOR SHORT CIRCUIT TO POWER SUPPLY SYSTEM
•  Turn the ignition switch to the ON position.
•  Inspect the voltage at airflow mode actuator connector terminal B and C.
Note
•  Inspect the continuity while shaking the wiring harness between the airflow mode actuator and climate control unit.
•  Can the voltage be measured?
Yes
Repair/replace the malfunctioning vehicle wiring harness.
After repair procedure, go to Step 8.
No
Go to the next step.
7
INSPECT AIRFLOW MODE ACTUATOR FOR OPEN CIRCUIT
•  Turn the ignition switch to the LOCK position.
•  Inspect the wiring harness for continuity between the airflow mode actuator connector and climate control unit connector.
―  Terminal B—Terminal H
―  Terminal C—Terminal F
Note
•  Inspect for continuity while shaking the wiring harness between the airflow mode actuator connector and climate control unit.
•  Is there continuity?
Yes
Go to the next step.
No
Repair/replace the malfunctioning vehicle wiring harness.
After repair procedure, go to the next step.
8
VERIFY THAT SAME DTC IS NOT OUTPUT
•  Reconnect the disconnected connectors.
•  Delete stored DTCs.
•  Shake the wiring harness between the airflow mode actuator and climate control unit.
•  Verify DTCs.
•  Is DTC 59 output?
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.
No
Go to the next step.
9
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Verify other DTC displayed.
•  Are any other DTCs output?
Yes
Perform the corresponding DTC inspection.
No
DTC troubleshooting completed.