B2409

DTC B2409 DIRECTION CONTROL MOTOR (DRIVER)

Component Location:

GENERAL DESCRIPTION
The Mode Control Actuator mounted on heater unit, adjusts position of mode door by operating Direction Motor based on signal of Heater & A/C controller. Pressing mode select switch makes the mode control actuator shift in order of vent -> B/L -> floor -> mix.

DTC DESCRIPTION
The Heater & A/C controller sets DTC B2409 if the Direction Motor doesn't move to intended position within 40 sec(In this case, Heater & A/C controller try to move mode door for 2 sec. 3 times, every 20 sec. before setting DTC).

DTC Detecting Condition:

Specification:

MONITOR SCANTOOL DATA
1. Connect scantool to data link connector(DLC).
2. Engine "ON"




3. Monitor the "DIRECTION POTENTIO.DR." parameter on the scantool while operating mode switch.
4. Is the DTC B2409 present and is parameter of "DIRECTION POTENTIO.DR." fixed?
* There is any fault in Driver Direction Motor. If the parameter of "DIRECTION POTENTIO.DR." is 10% or less on "VENT" mode, or If the parameter is 90% or more on "DEF" mode.

YES: Go to "Inspection" procedure.

NO: The electrical systems are made up of many harness and connectors. Many kinds of fault are caused by poor connection of sensors and terminals. Thoroughly check connectors for looseness, poor connection bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.

TERMINAL AND CONNECTOR INSPECTION
1. Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

YES: Repair as necessary and go to "Verification of Vehicle Repair" procedure.

NO: Go to "Signal Circuit Inspection" procedure.

SIGNAL CIRCUIT INSPECTION
1. Check for open in harness.
1. Ignition "OFF"
2. Disconnect Driver Mode Actuator.




3. Measure resistance between terminal "3,4" of Driver Direction Motor and terminal "19,20" of Heater & A/C controller.

Specification: Approx. 0 Ohm

4. Is the measured resistance within specifications?

YES: Check for short to ground in harness.

NO: Check for open in signal harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

2. Check for short to ground in harness.
1. Ignition "OFF"
2. Disconnect Driver Mode Actuator.




3. Measure resistance between terminal "3,4" of Driver Direction Motor and chassis ground.

Specification: Approx. infinite Ohm

4. Is the measured resistance within specifications?

YES: Go to "Visual/Physical Inspection "procedure.

NO: Check for short to ground in signal harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

VISUAL/PHYSICAL INSPECTION
1. Check actuator.
* Check if Driver Direction Actuator works properly through actuation test.
1. Ignition : ON




2. Connect Scantool and select "ACTUATION TEST" mode and press [F1]
3. Does Driver Direction Actuator work properly?

YES: Go to "Component Inspection" procedure.

NO: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.

COMPONENT INSPECTION
1. Check Heater & A/C controller.
1. Engine : "ON"
2. Connect Heater & A/C controller.




3. Measure voltage between terminal "19" and "20" of Heater & A/C controller while operating the mode switch.

Specification: Approx. 12 V

4. Is the measured voltage within specifications?

YES: Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.

NO: Substitute with a known-good Heater & A/C controller and check for proper operation.
If the problem is corrected, replace Heater & A/C controller and then go to "Verification of Vehicle Repair" procedure.

VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scantool and select "Diagnostic Trouble Codes(DTCs)" mode and then clear DTC.
2. Operate the vehicle and monitor the DTC on the scantool.
3. Are any DTCs present?

YES: Go to the applicable troubleshooting procedure.

NO: System is performing to specification at this time.