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HVAC Module DTC Chart

NOTE: Only the heated seat system related DTCs are listed. For all other HVAC module DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES article.
DTC Description Action
B12AB Drivers Heated Seat Relay Drive Circuit Shorted to Battery Voltage Go to Pinpoint Test G .
B12AC Drivers Heated Seat Relay Drive Circuit Open or Shorted to Ground Go to Pinpoint Test G .
B12AD Passenger Heated Seat Relay Drive Circuit Shorted to Battery Voltage Go to Pinpoint Test H .
B12AE Passenger Heated Seat Relay Drive Circuit Open or Shorted to Ground Go to Pinpoint Test H .
All Other DTCs - REFER to MULTIFUNCTION ELECTRONIC MODULES article.
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