DTC B1C1C:11, B1C1C:13 [FULL-AUTO AIR CONDITIONER]

id0702c1817200

DTC B1C1C:11

Airflow mode actuator (potentiometer) circuit short to ground

DTC B1C1C:13

Airflow mode actuator (potentiometer) circuit open
DETECTION CONDITION
CPU detects malfunction in airflow mode actuator (potentiometer) circuit
POSSIBLE CAUSE
•  Airflow mode actuator malfunction
•  Open circuit in wiring harness between climate control unit connector terminal 2K and airflow mode actuator connector terminal A
•  Open circuit in wiring harness between climate control unit connector terminal 2B and airflow mode actuator connector terminal C
•  Open circuit in wiring harness between climate control unit connector terminal 2L and airflow mode actuator connector terminal B
•  Short to ground in wiring harness between climate control unit connector terminal 2B and airflow mode actuator connector terminal C

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT AIRFLOW MODE ACTUATOR
•  Inspect the airflow mode actuator. (See AIRFLOW MODE ACTUATOR INSPECTION [FULL-AUTO AIR CONDITIONER].)
•  Is it normal?
Yes
Go to the next step.
No
Replace the airflow mode actuator. (See AIRFLOW MODE ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
2
INSPECT AIRFLOW MODE ACTUATOR (POTENTIOMETER) CIRCUIT FOR OPEN CIRCUIT
•  Disconnect the climate control unit connector and the airflow mode actuator connector.
•  Is there an open circuit in the wiring harness between the following terminals of the climate control unit and the airflow mode actuator?
―  2K—A
―  2B—C
―  2L—B
Yes
Repair the wiring harness.
No
Go to the next step.
3
INSPECT AIRFLOW MODE ACTUATOR (POTENTIOMETER) SHORT TO GROUND
•  Is there a short circuit to ground in the wiring harness between climate control unit terminal 2B and airflow mode actuator terminal C?
Yes
Repair the wiring harness.
No
The system is normal at present. (Clear the past malfunction from the memory.)