Locks, Latches and Entry Systems — 2016 workshop reference 1381

Yes	CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, Click here to access Guided Routine (BCM).
No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

Yes

CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test

and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, Click here to access Guided Routine (BCM).

The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

The Door Locks Operate Only One Way

Refer to Wiring Diagrams Cell 117 for schematic and connector information.

Normal Operations and Fault Conditions

REFER to: Handles, Locks, Latches and Entry Systems - System Operation and Component Description (501-14 Handles, Locks, Latches and Entry Systems, Description and Operation).

BCM DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
	B126A:01 Drivers Door Interior Lock Switch: General Electrical Failure	Sets during an on-demand self-test if the BCM detects a short to ground from one of the door lock control switch input circuits.

DTC

Description

Fault Trigger Conditions

B126A:01 Drivers Door Interior Lock Switch: General

Electrical Failure

Sets during an on-demand self-test if the BCM detects a short to ground from one of the door lock control switch input circuits.

DDM/ PDM DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
	B108F:23 Cabin Lock/Unlock Switch: Signal Stuck Low	Sets when the DDM/ PDM detects a short to ground from one of the door lock control switch input circuits.

DTC

Description

Fault Trigger Conditions

B108F:23 Cabin Lock/Unlock Switch: Signal Stuck

Low

Sets when the DDM/ PDM detects a short to ground from one of the door lock control switch input circuits.

Possible Cause

Fuse Wiring, terminals or connectors Door lock control switch PDM DDM BCM

Visual Inspection and Diagnostic Pre-checks

Check the BCM fuse 3 (20A)

PINPOINT TEST J : THE DOOR LOCKS OPERATE ONLY ONE WAY

J1 CHECK FOR AN INOPERATIVE DOOR LOCK

Operate the power door locks using both door lock control switches.

Is any door lock inoperative for both directions?

Yes	GO to Pinpoint Test I
No	GO to J2

J2 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) B108F:23 OR B126A:01

Ignition ON. For vehicles not equipped with a memory seat, using a diagnostic scan tool, perform the BCM self-test. For vehicles equipped with a memory seat, using a diagnostic scan tool, perform the DDM and the PDM self-tests.

Is DTC B108F:23 or B126A:01 present?

Yes	For vehicles not equipped with a memory seat, GO to J3 For vehicles equipped with a memory seat, GO to J5
No	VERIFY the BCM fuse 3 (20A) is OK. If OK, GO to J7 If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.

J3 ISOLATE THE DRIVER DOOR LOCK CONTROL SWITCH

Source reference 1381

2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.