Convertible Top — 2016 workshop reference 1558

DTC	Description	Fault Trigger Conditions
	B126E:24 Right Rear Window Fully Down Feedback: Signal Stuck High	This DTC sets in the BCMB when the right rear window fully down feedback signal does not indicate "fully down" within 10 seconds of a "window drop" message from the Moveable Roof Control Module A (MRCMA) (indicating a possible open circuit).
	B126F:23 Left Rear Window Fully Down Feedback: Signal Stuck Low	This DTC sets in the BCMB when the accessory delay relay is OFF and the left rear window fully down feedback signal is active (low, indicating a possible short to ground).
	B126F:24 Left Rear Window Fully Down Feedback: Signal Stuck High	This DTC sets in the BCMB when the left rear window fully down feedback signal does not indicate "fully down" within 10 seconds of a "window drop" message from the Moveable Roof Control Module A (MRCMA) (indicating a possible open circuit).

DTC

Description

Fault Trigger Conditions

B126E:24 Right Rear Window Fully

Down Feedback: Signal Stuck High

This DTC sets in the BCMB when the right rear window fully down feedback signal does not indicate "fully down" within 10 seconds of a "window drop" message from the Moveable Roof Control Module A (MRCMA) (indicating a possible open circuit).

B126F:23 Left Rear Window Fully

Down Feedback: Signal Stuck Low

This DTC sets in the BCMB when the accessory delay relay is OFF and the left rear window fully down feedback signal is active (low, indicating a possible short to ground).

B126F:24 Left Rear Window Fully

Down Feedback: Signal Stuck High

This DTC sets in the BCMB when the left rear window fully down feedback signal does not indicate "fully down" within 10 seconds of a "window drop" message from the Moveable Roof Control Module A (MRCMA) (indicating a possible open circuit).

Possible Sources

Wiring, terminals or connectors LH rear window motor RH rear window motor BCMB

PINPOINT TEST K : REAR WINDOW DOWN FEEDBACK SIGNAL FAULTS

K1 CHECK FOR MOVEABLE ROOF CONTROL MODULE A (MRCMA) AND MOVEABLE ROOF CONTROL MODULE B (MRCMB) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition ON. Using a diagnostic scan tool, carry out the Moveable Roof Control Module A (MRCMA) and Moveable Roof Control Module B (MRCMB) self-tests.

Are any Diagnostic Trouble Codes (DTCs) present in the Moveable Roof Control Module A (MRCMA) or Moveable Roof Control Module B (MRCMB)?

Yes		DIAGNOSE any Moveable Roof Control Module A (MRCMA) and Moveable Roof Control Module B (MRCMB) Diagnostic Trouble Codes (DTCs), before diagnosing any BCMB Diagnostic Trouble Codes (DTCs). GO to DTC Chart: Moveable Roof Control Module A (MRCMA) or DTC Chart: Moveable Roof Control Module B (MRCMB).
No		GO to K2

K2 CHECK FOR RETURNING BCMB (BODY CONTROL MODULE B) DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, clear the BCMB Diagnostic Trouble Codes (DTCs). Ignition OFF. Ignition ON. Using the convertible top switch, attempt to operate the convertible roof for a minimum of 10 seconds. Using a diagnostic scan tool, carry out the BCMB self-test.

Does DTC B126E:23, B126E:24, B126F:23 or B126F:24 return?

Yes GO to K3 No The concern may have been caused by a loose or corroded connector causing an intermittent fault condition. DISCONNECT BCMB C4368B, LH rear power window motor C3118 and RH rear power window motor C3119. INSPECT all 3 connectors for; corrosion, bent pins, pushed-out pins and spread terminals. REPAIR or INSTALL new as necessary.

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Source reference 1558

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.