
AC–46
AIR CONDITIONING SYSTEM – TROUBLESHOOTING
Air Inlet Damper Control Servo Motor Circuit
CIRCUIT DESCRIPTION
The air inlet damper control servo motor is controlled by the A/C amplifier and signals the air inlet damper to move to the desired position.
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 inlet damper position sensor
• Harness or connector between air inlet damper control servo motor assembly and A/C amplifier
• A/C amplifier
WIRING DIAGRAM
From HTR Fuse
A/C Amplifier
(M)
2 R-L 16
>> IG 1
RECIRC FRESH
5 G-R 13
>> IG 1 G-R 19 MREC
A14
3 G 15 G 20 MFRS
>> IG 1
A14
4 GR 14 GR 17
>> IG 1
A14
9
A14
GND
Air Inlet
Damper Control
Servo Motor
W-B A J1 A W-B
Junction
Connector
NC8778