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