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HVAC Control Module X1

Fig 1: HVAC Control Module X1 Connector End View
GM744296Courtesy of GENERAL MOTORS CORP.
HVAC Control Module X1

Pin Wire Circuit Function
A1 0.5 BK 1550 Ground
A2 0.35 WH 1038 HVAC Class 2 Serial Data
A3-A6 - - Not Used
A7 0.35 D-GN 734 Inside Air Temperature Sensor Signal
A8 0.35 TN 517 Upper Right Air Temperature Sensor Signal
B1 0.35 YE 61 Low Reference
B2 0.35 D-BU/WH 1355 Valet Mode Switch Signal
B3 0.35 YE/BK 68 Low Coolant Level Indicator Control
B4 0.35 L-GN/BK 735 Ambient Air Temperature Sensor Signal
B5 0.35 L-BU/BK 590 Driver Sunload Sensor Signal
B6 0.35 GY 1548 Passenger Sunload Sensor Signal
B7 0.35 WH 278 Ambient Light Sensor Signal
B8 0.35 TN 516 Upper Left Air Temperature Sensor Signal
Connector Part Information 
  • OEM: 12110259
  • Service: 12110259
  • Description: 16-Way F Micro-Pack 100 Series (GN)
Terminal Part Information 
  • Terminal/Tray: 12146447/3
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)
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