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DTC 21

BHE070201038W08

DTC 21 | Airflow mode actuator (potentiometer) system inspection
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POSSIBLE CAUSE | • Airflow mode actuator malfunction • Open circuit in wiring harness between A/C amplifier and airflow mode actuator • Short circuit in wiring harness between A/C amplifier (terminal 2G) and airflow mode actuator (terminal E)

## Diagnostic Procedure

STEP | INSPECTION | ACTION
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1 | • Inspect the airflow mode actuator. (See AIRFLOW MODE ACTUATOR INSPECTION.) • Is it normal? | Yes | Go to the next step.
No | Replace the airflow mode actuator. (See AIRFLOW MODE ACTUATOR REMOVAL/INSTALLATION.)
2 | • Disconnect the air mix actuator connector. • Is the resistance between terminals 2G and 2P of the A/C amplifier connector (16-pin) 698 ohms or more? | Yes | Go to the next step.
No | Repair the wiring harness. (Short circuit)
3 | • Disconnect the A/C amplifier connector (16-pin). • Is the resistance between terminals 2O and 2P of the A/C amplifier connector (16-pin) 6.0 kilohms or less? | Yes | Go to the next step.
No | Repair the wiring harness. (Open circuit)
4 | • Is the resistance between terminals 2O and 2G of the A/C amplifier connector (16-pin) 5.2 kilohms or less? | Yes | Inspect the connection at the A/C amplifier connector (16-pin). (See A/C AMPLIFIER INSPECTION [FULL-AUTO AIR CONDITIONER].)
No | Repair the wiring harness. (Open circuit)