Component Location
General Description

Intake door located at heater unit controls the inlet of car. It contains intake motor that changes intake door position and potentiometer that monitors position of intake door. When driver operates the intake switch, ECU receives mode signal from intake switch and operates intake door motot to turn intake door to intended position. (with FRE mode signal, intake door is closed and with REC mode signal, intake door is opened)In operation, potentiometer delivers intake door position transformed into voltage value to A/C ECU.

DTC Description

Airconditioner Control Module sets DTC B1209 if the Feed Back signal of Intake Actuator has been detected over 4.9V for 0.1 seconds.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

•

Voltage check

1.

Short to battery in signal(Feedback) circuit

2.

Open in ground circuit

3.

Faulty Intake Actuator

4.

Faulty Air Conditioner Module

Enable Conditions

•

IG KEY ON

Threshold value

•

Feedback circuit has been detected over 4.9V for 0.1 seconds.

Failsafe

•

Intake Actuator is moved and fixed at FRE position if FRE is selected or REC position if REC is selected.

Specification
※ Voltage value of Intake potentiometer as a function of position of Intake door

Door position

Voltage

FRE

0.5V

REC

4.5V

Diagnostic Circuit Diagram
note
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