DTC 21

id070200803300

DTC 21

Front airflow mode actuator (potentiometer) (present)

POSSIBLE CAUSE

•  Front airflow mode actuator malfunction

•  Open circuit between front airflow mode actuator and front climate control unit

•  Short circuit between front airflow mode actuator (terminal E) and front climate control unit (terminal 2E: 16-pin)

DTC 21	Front airflow mode actuator (potentiometer) (present)
POSSIBLE CAUSE	• Front airflow mode actuator malfunction • Open circuit between front airflow mode actuator and front climate control unit • Short circuit between front airflow mode actuator (terminal E) and front climate control unit (terminal 2E: 16-pin)

Diagnostic procedure

STEP	INSPECTION		ACTION
1	• Inspect front airflow mode actuator. (See FRONT AIRFLOW MODE ACTUATOR INSPECTION.) • Is it okay?	Yes	Go to the next step.
1		No	Replace front airflow mode actuator. (See FRONT AIRFLOW MODE ACTUATOR REMOVAL/INSTALLATION.)
2	• Disconnect driver side and passenger side front air mix actuator connector. • Disconnect rear air mix actuator connector. • Disconnect rear airflow mode actuator connector. • Disconnect ambient temperature sensor connector. • Disconnect cabin temperature sensor connector. • Disconnect front and rear evaporator temperature sensor connector. • Is resistance between terminals 2E and 2P of front climate control unit connector (16-pin) more than 840 ohms?	Yes	Go to the next step.
2		No	Repair wiring harness. (Short circuit)
3	• Disconnect front climate control unit connector (16-pin). • Is resistance between terminals 2B and 2P of front climate control unit connector (16-pin) less than 7.8 kilohms?	Yes	Go to the next step.
3		No	Repair wiring harness. (Open circuit)
4	• Is resistance between terminals 2B and 2E of front climate control unit connector (16-pin) less than 6.24 kilohms?	Yes	Inspect the connection of the front climate control unit connector.
4		No	Repair wiring harness. (Open circuit)