2011 F-250 SD P/U - Multiplex Mode Actuator Assembly w Cable
Posted to HVAC Forum on 12/22/2012
24 Replies
2011 F-250 SD P/U - Multiplex Mode Actuator Assembly w Cable
Informational systems do not always supply us with a picture
perfect course of action or a picture perfect ending. For
instance: newer informational systems commonly lack
real-life photos, pictures that depict the actual
information, illustrations that do not mislead, and
so-forth; which relates to an actual loss of a thousand
words or more for each omission. Further, we pay for such
lacking and substandard information.
To better understand the above statements, review the
following provided herein regarding a 2011 Ford F-250 Super
Duty Pickup. After you review the following, access your
informational system and see how the following relates, or
not, for the information you are paying for.
Complaint: lower than normal air flow (which by itself can
be misunderstood by many technicians with newer vehicles
concerning multiplex inclusions and technologies).
Verification: modes unable to complete, weaker than normal
panel register air flow, weaker than normal floor duct
outlet air flow, simultaneous panel register airflow and
floor duct outlet airflow, and no defrost duct outlet air
flow.
Diagnostics: no DTCs (in this case), able to send commands
to MMAA, signals received at MMAA, limited movements of
MMAA, and unable to achieve MMAA actuals (targets).
Plan of action: remove MMAA to verify all associated modes,
and mode components, for proper function/movement.
Course of action: simple . . . right? Well, unless there is
a way that doesn't require cutting or the hot-wrench, the
next course of action is a bit entailed. To keep everyone
awake, the basics were skipped . . . and, fast-forwarded to:
disassembled and photos.
Presentation - Signature View: for authentication, tips
to follow.
Access Hole for Bolt Removal: remove the left side body
rubber plug within the door jam and remove the bolt. A
1/4-inch dive six-point socket, swivel, and extension taped
together with electrical tape works well in removal efforts.
A piece of electrical tape across the hex end of the socket
helps lock the bolt in the hex for removal and installation.
Caution: there is no reason to access behind the clear tape
- do not puncture the clear transparent circular tape.
Light Shining Through Hole: visual aid,
self-explanatory.
Interior Side: Through Bolt Goes Through Bracket to
Secure Dash
Left Side Interior View
Left Interior: Two Bolts Removed: some informational
systems have this information as ONE bolt only, which is
incorrect.
Left Side Interior: Fastener Removal - Closer View: worth
mentioning again - two bolts.
Multiplex Mode Actuator Assembly with Cable: the
complexities involved for this particular part with today's
systems offer one actuator motor using many combined
movements through a series of cams, grooves, pins, levers,
doors; and in this case, a cable as well.
Cable for Panel (Vent/Face) Mode: at first glance (in a
first encounter, especially before dash disassembly), the
cable function may be misinterpreted.
Multiplex Mode Actuator Assembly Top View: the mounting
bolts for the actuator motor cannot be accessed while
mounted to the HVAC housing/case without removing the
Multiplex Mode Actuator Assembly. Even with the total
Multiplex Mode Actuator Assembly removed, actuator motor
removal requires further disassembly. A replacement
Motorcraft Multiplex Mode Actuator Assembly comes complete,
including the cable (snapped in place on the MMAA at both
ends for protection) and the opposite end cable door
lever.
Multiplex Mode Actuator Assembly Underneath View: if
necessary to remove the individual actuator motor for
whatever reason (once the Multiplex Mode Actuator Assembly
is removed), remove the top black multiplex motion lever
that controls the defrost slot and the white slotted lever
for the floor, then remove the sandwiched white multiplex
motion cam, then remove the underneath black multiplex
motion lever that controls the white outer cased panel
(vent/face) cable. Notice that the color coded black -
controls white, and the color coded white - controls black.
Note: a homemade two step dowel insert or equivalent aids in
the collapsing of the retainer tab ends holding each of the
black multiplex motion levers to prevent breaking the tabs
off. The best course of action is to replace the entire
Multiplex Mode Actuator Assembly. The Motorcraft part number
for this particular vehicle - Motorcraft YH-1925.
Interior Left to Center View
Defrost Door Lever
Floor Door Lever
Interior Left to Right View
Interior Center to Right View
Interior Center View: Upper
Enhanced Interior Center View: Lower
Right Center Panel (Vent/Face) Mode Door with
Reinforcement
Left and Right Panel (Vent and Face) Diffuser Routing
Chambers
Interior Right to Left View
Interior Right to Center View
Temperature Blend Actuator
Right Interior: One Bolt Removed
Interior Right Side View
Outside-Fresh-Air/Recirculation-Air Actuator & ETS
Connector
Interior Right to Left View From Door
The above is meant for informational purposes. If there are
any discrepancies, please include the appropriate
information and nature of the discrepancies for discussion
and/or corrections to be made.
Glenn (H)
Glenn from Louisiana
24 Replies Received
(View Replies)
24 Replies Received
(Hide Replies)
|