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z Battery voltage is between 9.0-16.0 volts. z The DTC will set if the rear door unlock function is active or inactive. Conditions for Setting the DTC The DTC will set if the door unlock relay control circuit is shorted to ground or open for more then one second. Action Taken When the DTC Sets z If a short to ground is present on the door unlock relay control circuit, the door unlock relay will be z If an open condition is present on the door unlock relay control circuit, the rear doors will lock but not Diagnostic Aids z DTC B3809 could also set if the door unlock relay winding is open. z If both DTC B3808 and B3809 are set as current, the battery positive voltage circuit or the LOCKS fuse { A short to ground in the relay battery positive voltage circuit. { A short to ground in the door lock actuator lock or unlock control circuits. Conditions for Clearing the DTC When the fault is no longer present, the BCM changes the current DTC to a history DTC. The BCM will clear Test Description The numbers below refer to the step numbers on the diagnostic table. 2: Listen for an audible click when the rear door unlock relay operates. Command both the ON and OFF 3: Tests for voltage at the coil side of the rear door unlock relay. The LOCKS fuse supplies power to the 4: Verifies that the body control module is providing ground to the rear door unlock relay. 5: Tests if ground is constantly being applied to the rear door unlock relay. DTC B3809 Step Action Yes No Schematic Reference: Door Lock/Indicator Schematics 1 Did you perform the Door Systems Diagnostic Go to Diagnostic System Check -
2004 Hummer H2 2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2
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