Pinpoint Test B : The Heated Seats Are Inoperative -- Driver And Passenger
WARNING: This page is about a different car, the 2018 Ford EcoSport. However, it is still accessible from the selected car via links, so may be relevant.
- B1 CHECK FOR HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
- Ignition ON.
- Using a diagnostic scan tool, perform HVAC module self-test.
Are any HVAC module Diagnostic Trouble Codes (DTCs) present?
Yes REFER to the DTC Chart: HVAC Module . No GO to B2 - B2 CHECK THE HEATED SEAT VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: HVAC Module C228B.
- Ignition ON.
Is the voltage greater than 11 volts?
Yes GO to B3 No VERIFY BJB fuse 60 (20A) (Mexico) or 40 (25A) (United States and Canada) is OK. If OK, REPAIR the circuit. If not OK, REFER to the SYSTEM WIRING DIAGRAMS to identify the possible causes of the circuit short. - B3 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE OPERATION
- Ignition OFF.
- Disconnect and inspect all of the HVAC module connectors.
- Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins as necessary
- pushed-out pins - install new pins as necessary
- Reconnect the HVAC module connectors. Make sure they seat and latch correctly.
- Reconnect all previously disconnected connectors.
- Ignition ON.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new HVAC module. Refer to the appropriate Climate Control System article for the procedure. No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.