Component Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Heated and Cooled Seat Switch
- Ignition OFF, disconnect the X4 harness connector at the appropriate door lock/window switch.
- Test for infinite resistance between the low reference circuit terminal 4 and the signal terminals listed below with the switch in the open position.
- Seat back and cushion heat switch terminal 6
- Seat back only mode heat switch terminal 7
- Seat cool switch terminal 3
- If less than infinite resistance
Replace the heated and cooled seat switch
- If infinite resistance
- Test for less than 2 Ω between the low reference circuit terminal 4 and the signal terminals listed below with the appropriate switch in the closed position.
- Seat back and cushion heat switch terminal 6
- Seat back only mode heat switch terminal 7
- Seat cool switch terminal 3
- If 2 Ω or greater
Replace the heated and cooled seat switch
- If less than 2 Ω
- Install a 3 A fused jumper wire between the low reference circuit terminal 4 and ground.
- Verify the appropriate indicator illuminates when connecting a test lamp between B+ and each control terminal listed below:
- Seat back only mode indicator terminal 11
- Seat cool mode indicator terminal 12
- Seat back and cushion indicator terminal 10
- Low temperature indicator terminal 9
- Medium temperature indicator terminal 1
- High temperature indicator terminal 2
- If any indicator does not illuminate
Replace the heated and cooled seat switch
- If all indicators illuminate
- Replace the door lock/window switch.