B3922

DTC B3922

CIRCUIT DESCRIPTION
The body control module (BCM) monitors the Windshield Wiper Switch Low signal circuit and performs the proper logic to activate the windshield wipers in the Low, Intermittent or Delay mode of operation. The BCM can discern if there is a malfunction on the Windshield Wiper Switch Low circuit. If the BCM detects that the circuit is shorted to B+, B- or the signal is corrupted the BCM sets DTC B3922 and the wipers will not function in the in the Low, Intermittent or Delayed modes. If this DTC is set as current, only the High mode of operation will be functional.

CONDITIONS FOR RUNNING THE DTC
- System voltage is between 9.0-16 volts.
- Ignition switch is in the ON position.

CONDITIONS FOR SETTING THE DTC
If the BCM detects that the circuit has shorted to B+, B- or the signal is not discernible to the BCM, DTC B3922 will set.

ACTION TAKEN WHEN THE DTC SETS
The BCM will not command the wipers to operate in the Low, Delay or Intermittent modes.
The Wipers will only function in the High mode.

CONDITIONS FOR CLEARING THE DTC
- When the switch input status is analyzed to be non-malfunctioning by the BCM or the malfunction no longer exists, the code will be set as history.
- A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.

TEST

Steps 1 - 3:

Steps 4 - 9: