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HVAC Module DTC Chart

NOTE: Only DTCs related to the heated seat system are listed. For all other HVAC module DTCs, refer to DIAGNOSTIC TROUBLE CODE (DTC) CHART article.
HVAC MODULE

DTC Description Action
B12AB Drivers Heated Seat Relay Drive Circuit Shorted to Battery Voltage GO to PINPOINT TEST B .
B12AC Drivers Heated Seat Relay Drive Circuit Open or Shorted to Ground If the driver heated seat does not heat, GO to PINPOINT TEST B .
If the driver heated seat will not shut off, GO to PINPOINT TEST D .
B12AD Passenger Heated Seat Relay Drive Circuit Shorted to Battery Voltage GO to PINPOINT TEST C .
B12AE Passenger Heated Seat Relay Drive Circuit Open or Shorted to Ground If the passenger heated seat does not heat, GO to PINPOINT TEST C .
If the passenger heated seat will not shut off, GO to PINPOINT TEST D .
All Other DTCs - REFER to DIAGNOSTIC TROUBLE CODE (DTC) CHART article.
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