Air Conditioner
OK:
Air flow position changes in accordance with each control range.
NG -- INSPECT NO. 1 AIR MIX CONTROL SERVO MOTOR (AIR OUTLET CONTROL SERVO MOTOR)
OK -- REPLACE A/C AMPLIFIER
3. INSPECT NO. 1 AIR MIX CONTROL SERVO MOTOR (AIR OUTLET CONTROL SERVO MOTOR)
(a) Replace the No. 1 air mix control servo motor (air outlet control servo motor) See: Heating and Air Conditioning/Housing Assembly
HVAC/Service and Repair/Overhaul/Disassembly.
HINT
Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known
good one and check that the condition returns to normal.
(b) Check for the DTC.
Result:
B -- END (AIR OUTLET CONTROL SERVO MOTOR WAS DEFECTIVE)
A -- Continue to next step.
4. INSPECT AIR CONDITIONING HARNESS
(a) Replace the air conditioning harness See: Heating and Air Conditioning/Housing Assembly HVAC/Service and
Repair/Overhaul/Disassembly.
HINT
Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness
with a new or a known good one and check that the condition returns to normal.
(b) Check for the DTC.
Result:
B -- END (AIR CONDITIONING HARNESS WAS DEFECTIVE)
A -- REPLACE A/C AMPLIFIER
From 08/2009
HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1443/43: Air Outlet Damper Control Servo Motor Circuit
B1443/43 - Air Outlet Damper Control Servo Motor Circuit
DESCRIPTION
The air outlet control servo motor sends pulse signals to indicate the damper position to the A/C amplifier. The A/C amplifier activates the motor
(normal or reverse) based on these signals to move the mode damper to any position, which controls the air outlet switching.
The A/C amplifier communicates with the servo through a communication/driver IC and wiring assembly called the air conditioning harness.
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