B3128

DTC B3128 Driver Door Unlock Output Short To BATT:

CIRCUIT DESCRIPTION
This trouble code (both current and history) indicates that CKT 356 is shorted to positive battery voltage.

CONDITIONS FOR SETTING THE DTC
All of the following conditions must be met:
^ CKT 356 is shorted to B+
^ The system voltage must be between 9-16 volts.
^ The above conditions must be met for 30 seconds.

ACTION TAKEN WHEN THE DTC SETS
Stores DTC B3128 in the Body Control Module (BCM) memory.

CONDITIONS FOR CLEARING THE DTC
^ The BCM goes to sleep and reinitializes with the fault cleared.
^ All of the BCM history codes clear after 100 ignition cycles (from OFF to ON) with no current codes active during the 100 ignition cycles.
^ Use the Scan Tool in order to clear DTCs.

DIAGNOSTIC AIDS
If the DTC is a history DTC, the problem may be intermittent. Perform the above tests while wiggling the wiring and connectors. This will cause the malfunction to appear.

TEST DESCRIPTION
The numbers below refer to the numbers on the diagnostic table.
4. This step determines it the driver door unlock relay is operating properly
6. This step determines a short to battery in CKT 356 within the left I/P wiring harness junction block.
8. This step determines a short to battery in CKT 356 between the left I/P wiring harness junction block and the Body Control Module (BCM).