AC/Air Conditioning — Blinking Light Lo Hi Air Outlet Damper Position Sensor Circuit, page 48

AC–48
AIR CONDITIONING SYSTEM – TROUBLESHOOTING

Blinking Light LO HI Air Outlet Damper Position Sensor Circuit

CIRCUIT DESCRIPTION

This sensor detects the position of the air mix
damper and sends the appropriate signals to the
A/C amplifier.
The position sensor is built into the air outlet
damper control servo motor assembly.

(V)
4
TPM terminal
voltage
1
0                    100%
Damper opening angle    AC2184

Light    Diagnostic Sensor Check Detecting Condition    Trouble Area

LO    Short to ground or power source circuit in air
outlet damper position sensor circuit.
    • Air outlet damper position sensor
• Harness or connector between air outlet
damper control servo motor assembly and
A/C amplifier
• A/C amplifier

HI    Air outlet damper position sensor value does
not change even if A/C amplifier signals the air
outlet damper control servo motor to move.

WIRING DIAGRAM

Air Outlet Damper
Position Sensor
Air Outlet Damper
Control Servo Motor

4    BR-W    5    BR-W    2    S5    5 V
              IG 1         A13

3    LG    6    LG    10    TPM
              IG 1         A14

5    V-W    4    V-W    9    SG
              IG 1         A13

A/C Amplifier

N08817