The A/C ControlModule sets DTC B1284 if The signal from Auto defogger humidity Potentiometer(actuator) is at or over 4.9V for 0.3 seconds.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Voltage check | 1. Poor connection in harness 2. Short to battery in signal(Feedback signal) circuit 3. Open in ground circuit 4. Auto defogger humidity Potentiometer(actuator) 5. A/C Control Module |
Enable Conditions |
•
Ignition "ON" | |
Threshold value |
•
Feedback ciruit has been detected over 4.9V for 0.3 seconds | |
Failsafe |
•
If selected Mode was VENT,B/L, it is moved and fixed at Close position
•
If the others mode, it is moved and fixed at Open position |
