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Home >> Lincoln >> 2018 >> MKZ Select, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1601 (Handles, Locks, Latches And Entry Systems (Except Electric) (2 Of 2)) >> Diagnosis And Testing >> Locks, Latches and Entry Systems - Vehicles With: One-Touch Open and Close Front Windows >> Pinpoint Tests >> Pinpoint Test Y : B1087:83, B1087:86 Or B1087:88 >> Notes

Pinpoint Test Y : B1087:83, B1087:86 Or B1087:88: Notes

WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Remote Keyless Entry and Alarm for schematic and connector information.

Normal Operation and Fault Conditions 

The Driver Rear Door Module (DRDM) and Passenger Rear Door Module (PRDM) communicate with the DDM and PDM over a dedicated LIN for each module. The DDM also receives information from the switch pack on the driver door on the LIN.

In the event of a failure on a LIN, the power windows, power locks and switch illumination are inoperative in the rear door. If there is a LIN failure for the DDM, the switch pack on the driver door are inoperative.

DDM/ PDM DTC Fault Trigger Conditions 

DTC Description Fault Trigger Conditions
B1087:83 LIN Bus "A": Value Of Signal Protection Calculation Incorrect Sets in the DDM or PDM when it receives invalid data over the LIN.
B1087:86 LIN Bus "A": Signal Invalid Sets in the DDM or PDM when it receives invalid data over the LIN.
B1087:88 LIN Bus "A": Bus Off Sets in the DDM or PDM when an open or short from the LIN circuit is detected.

Possible Causes 

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