Question about 1994 Chrysler Concorde
You might have a loose connection to the unit's main ground point which is nearby: on the airbag module's mounting bracket. That wire is the black/light green from pin 6 of the 8 pin connector at the head unit and the air bag module is in the same general vicinity but behind the other control units. It may just be a loose attachment at the air bag bracket or a bad solder at the pin 6. Anytime something such a unit shuts down like that and can be restarted by tapping I think of power supply or ground. The voltage supply for the unit is on pin 5 of the same plug so check that pin/wire solder connection.
That code says there is a failure in the communication over the digital data link connection to and from the unit. Those wires are those on pins 3 and 4 of the black plug (white/black, violet/brown).
I would check to be sure that the pins of the plug socket where they attach to the circuit board of the unit are patent. Use a soldering pencil to reheat the solder joints. If that doesn't fix it, then go to the data link connector, a six pin plug under the dash to the right of the steering column, where you will find those same two wires. Use an ohmmeter to verify there is a connection between the data link wires and the plug at the ATC head unit. That will assure that the ATC is connected to the rest of the data system. If it is, then it has to be internal to the ATC head unit.
Or it could have a similar cold solder joint on a different pin of the circuit board (such as pin 5 of the black plug or pin 1 of the green plug which provide the current).
Posted on Jul 27, 2009
AC units have two actuators. Both actuators (air, and blend) are located on the left side of the AC, and each actuator has five wires connected.
The blend actuator is the one located at the bottom side, near to the center tunnel.
Disconnect the battery cable before removing the actuator.
To to access the blend actuator you have to remove the under dash panel ducts on both sides. When you find the blend actuator you will need to remove a few of screws on the right side of the center stack and one screw on left side of the stack. Pull the actuator down to disconnect it from the blend door shaft.
Do the operations in reverse order to fit the new actuator ansuring that is placed in the same position as the old one.
Posted on Jul 27, 2009
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Posted on Jan 02, 2017
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Jan 28, 2014 | 2002 Ford Expedition
Temperature Control Blend Door Failure No Heat or no AC (dependes on
where door sticks)
all modern cars there is a tiny DC electric motor driven gear drive
that moves a plastic door that blends heated and cooled air from the
AC and the heater core, this is called (interestedly enough) the air
temperature control blend door actuator. The motor that moves this
door fails because the door starts sticking from warping, most common
complaint is no heat but it can be no AC as well. To replace these
parts (blend door and blend door actuator) you must remove the entire
dash from the car. Always have this problem confirmed by a dealer or
qualified repair shop as it is a very expensive repair.
Other causes of no heat in the cabin are engine thermostats that are stuck open (engine runs cold) or air bubbles in the cooling system.
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Fig. Remove the floor air outlet duct extension (1) from the floor duct (2)
Disconnect the electrical connection at the blend door actuator (#10 in pic below).
Fig. Blend door actuator and related components
Remove the blend door actuator mounting screws from the HVAC module.
Remove the blend door actuator as an assembly with the actuator cam.
Fig. Remove the blend door actuator mounting screws from the HVAC module
Picture of actuator:
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Aug 30, 2014 | 1994 Chrysler Concorde
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