B1847–SUNROOF VENT SWITCH INPUT CIRCUIT HIGH





For a complete wiring diagram Refer to Section 8W.

Theory of Operation


The Sunroof Motor/Module supplies a 12 volt supply circuit to the sunroof switch. When the switch is closed to any of the 3 sense circuits (open, close or vent), it sends that command back to the module.


  • When Monitored:

    Whenever the Sunroof module is awake.

  • Set Condition:

    Whenever the module has determined that the vent switch has been applied for over 15 seconds or there is a short to voltage on the Sunroof Vent Switch Sense circuit, this code will set.


Possible Causes
  
(Q4) SUNROOF VENT SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
  
(Q4) SUNROOF VENT SWITCH SENSE CIRCUIT SHORT TO (Q6) SUNROOF SWITCH SUPPLY CIRCUIT
  
SUNROOF SWITCH SHORTED
  
SUNROOF MOTOR/MODULE
  



Diagnostic Test

1.TEST FOR INTERMITTENT CONDITION







Does the scan tool display B1847–SUNROOF VENT SWITCH INPUT CIRCUIT HIGH?

Yes
  • Go To 2


No
  • The conditions that caused this code to set are not present at this time. Check the switch for any binding conditions and using the wiring diagram/schematic as a guide, inspect the wiring and connectors.

2.SUNROOF SWITCH SHORTED









Does the scan tool display B1847–SUNROOF VENT SWITCH INPUT CIRCUIT HIGH?

Yes
  • Go To 3


No

3.(Q4) SUNROOF VENT SWITCH SENSE CIRCUIT SHORT TO VOLTAGE


NOTE: To further diagnose the sunroof, it is necessary to lower or remove the headliner.





NOTE: Ensure the A-Pillar connector is connected before proceeding.





Is the voltage above 0.4 volts?

Yes


No
  • Go To 4

4.(Q4) SUNROOF VENT SWITCH SENSE CIRCUIT SHORT TO (Q6) SUNROOF SWITCH SUPPLY CIRCUIT







Is the resistance below 1000.0 ohms?

Yes


No