B3992

DTC B3992

CIRCUIT DESCRIPTION
The window position sensors receive a battery voltage reference and a constant ground source. These sensors also provide window position information to the roof/door module (RDM) through 2 signal circuits.

DTC DESCRIPTORs
This diagnostic procedure supports the following DTCs:
- DTC B1533 Passenger Window Position Sensor Circuit
- DTC B3992 Driver Window Position Sensor Circuit

CONDITIONS FOR RUNNING THE DTC
- Battery voltage is between 9-16 volts.
- The window must be active in the up or down direction.

CONDITIONS FOR SETTING THE DTC
The DTC will set when any of the following conditions has occurred:
- An open, short to ground or battery in the window sensor signal circuits
- The window sensor battery voltage reference circuit is open.
- The window sensor low reference circuit has failed.

ACTION TAKEN WHEN THE DTC SETS
- The RDM will not allow the window indexing, express down, or supervised window functions for the affected window.
- The affected window will start and stall with each up or down switch activation.

CONDITIONS FOR CLEARING THE DTC
- When the fault is no longer present, the RDM will keep the DTC current until the window has been relearned and an indexing function has occurred. Then the current DTC will change to a history DTC.
- The RDM will clear the history DTC after 50 fault-free ignition cycles.
- A current or history DTC can also be cleared using a scan tool.

DIAGNOSTIC AIDS
If both DTCs B1533 and B3992 are set as current, the most likely cause is an open in the window sensor battery voltage reference circuit.

TEST

Steps 1 - 13:

Step 14: