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Componet Location

General Description

The mode control actuator is mounted at the heater control unit. The mode control actuator consists of a motor and a feedback potentiometer. Pressing mode select switch makes the mode control actuator shift in order of vent→ B/L → floor → mix.

DTC Description

B2409 will set if the mode actuator has not responded to an A/C ECU actuation signal for over 40 seconds.

DTC Detecting Condition

Item	Detecting Condition	Possible Cause
DTC Strategy	• Voltage check	• Poor contact in harness • Open or short in motor power circuit • Faulty Driver Direction actuator • Faulty air conditioner control module
Enable Conditions	• IG KEY ON
Threshold value	• No movement to controlled mode position for 40 seconds
Failsafe	• Fixed as current position

Specification

※ Voltage value of potentiometer as a function of mode door position.

Mode Door Position	Voltage
VENT	0.4±0.3V
BI-LEVEL	1.45±0.3V
FLOOR	2.5±0.3V
MIX	3.55±0.3V
DEF	4.6±0.3V

Diagnostic Circuit Diagram