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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1548 (Windows And Glass - Glass, Frames And Mechanisms) >> Diagnosis And Testing >> Glass, Frames and Mechanisms >> DTC Charts >> HVAC Module DTC Chart

HVAC Module DTC Chart

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For hybrid only, the HVAC module utilizes a 5-character DTC followed by a 2-character failure type code. The failure type code provides information about specific fault conditions such as opens or shorts to ground. CMDTCs  have an additional 2-character DTC status code suffix to assist in determining DTC history.
DTC CHART

DTC Description Action
B12BE Heated Backlight/Mirror Relay Drive Circuit Shorted to Battery Voltage GO to PINPOINT TEST F .
B12BF Heated Backlight/Mirror Relay Drive Circuit Open or Shorted to Ground If the rear window does not defrost, GO to PINPOINT TEST F .
If the rear window defrost does not turn off, GO to PINPOINT TEST G .
B1C83:12 Rear Defog Relay: Circuit Short to Battery GO to PINPOINT TEST F .
B1C83:14 Rear Defog Relay: Circuit Short to Ground or Open If the rear window does not defrost, GO to PINPOINT TEST F .
If the rear window defrost does not turn OFF, GO to PINPOINT TEST G .
All other DTCs - REFER to the Master DTC Chart in DIAGNOSTIC TROUBLE CODE (DTC) CHART for Master DTC Chart .
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