DTC B1274, B1275 [FULL-AUTO AIR CONDITIONER]SM2445594
DTC B1274, B1275 [FULL-AUTO AIR CONDITIONER]

id0702c1800800

DTC B1274, B1275

Airflow mode actuator (potentiometer) system
POSSIBLE CAUSE
• Airflow mode actuator malfunction
• Open circuit in wiring harness between climate control unit and airflow mode actuator
• Short circuit in wiring harness between climate control unit (terminal 1P) and airflow mode actuator (terminal C)

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
• 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
• 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?
― 1J—B
― 1P—C
― 1C—A
Yes
Repair the wiring harness.
No
Go to the next step.
3
• Is there a short circuit to ground in the wiring harness between climate control unit terminal 1P and airflow mode actuator terminal C?
Yes
Repair the wiring harness.
No
The system is normal at present. (Clear the malfunction from the memory.)