B1446

DTC B1446/46 AIR MIX DAMPER CONTROL SERVOMOTOR CIRCUIT (DRIVER SIDE)

CIRCUIT DESCRIPTION

Detection Item:

The air mix damper servo sends pulse signals to inform the A/C amplifier of the damper position. The A/C amplifier activates the motor (normal, reverse) based on the signals to move the air mix damper (driver seat) to any position, which adjusts the amount of air passing the heater core after passing the evaporator to control the blowing air temperature.

HINT: Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or damper is mechanically locked.

Wiring Diagram:

Step 1-2:

INSPECTION PROCEDURE

HINT: When using the hand-held tester, start inspection step 1 and when not using the hand-held tester, start from step 2.