B1028 - Rear Blower Control Request Input Circuit Low: Notes

Fig 1: Rear Blower Control Request Input Circuit Low - Wiring Diagram

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS information.

>>When Monitored:<< With the ignition on.
>>Set Condition:<< If the A/C heater control detects voltage less than a calibrated value for a specified amount of time on the rear blower feed sense or the rear blend sense supply circuits.

Possible Causes
REAR BLOWER FEED SENSE OR REAR BLEND SENSE SUPPLY CIRCUITS C11 AND C800 SHORTED TO GROUND
REAR BLOWER FEED SENSE OR REAR BLEND SENSE SUPPLY CIRCUITS C11 AND C800 OPEN
REAR BLOWER CONTROL SWITCH
A/C HEATER CONTROL

NOTE:

This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC is stored.