AC/Air Conditioning — Blinking Light M2 Air Mix Damper Control Servo Motor Circuit, page 44

AC–44
AIR CONDITIONING SYSTEM – TROUBLESHOOTING

Blinking Light M2 Air Mix Damper Control Servo Motor Circuit

CIRCUIT DESCRIPTION

The air mix damper control servo motor is controlled by the A/C amplifier and signals the air mix damper to move to the desired position.

Diagnostic Sensor Check Detecting Condition | Trouble Area

Air mix damper position sensor value does not change even if A/C amplifier signals the air mix damper control servo motor to operate.
• Air mix damper control servo motor
• Air mix damper position sensor
• Harness or connector between A/C amplifier and A/M damper control servo motor, A/M damper position sensor
• A/C amplifier

WIRING DIAGRAM

HTR Fuse

A/C Amplifier

R-L    8
        A14    IG

V              9         V    3
              IG1              A13    MH

Air Mix Damper
Control Servo Motor

2                    V

R-Y              2    R-Y    1
              IG1              A13    MC

1

W-B    A    J1    A    W-B         9
              Junction                  A14    GND
              Connector

NO8777