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How do you remove or inspect the ac dash control

I have a 2002 Cadi Deville, how do you remove or inspect the ac dash control unit for lose wiring? The on/off switch has been working intermittently I want to check the contacts.

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2002 Cadi Deville, can't get any locks to operate with remote or dash push buttons, the remote operates everthing but the locks! When the remote door lock is pressed, lites flash,horn blows locks not.


Power Door Lock Operation
The vehicle is equipped with power door locks. Each lock actuator is powered and controlled by the door module mounted in the individual door, but the rear integration module (RIM), which is the master control for the door lock system, determines when the lock functions are permitted. The RIM receives and examines the requested lock function from the individual door modules, or from the remote function actuator (RFA) via the class 2 serial data circuit. The RIM also examines the transmission shift selector position and the ignition switch position information available over the Class 2 serial data circuits. If the RIM determines that a lock or unlock function is permitted, it sends a class 2 message back to the individual door modules commanding them to perform that Lock or Unlock function.
Power Door Lock Components
The power door lock system consists of the following components:
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Driver door lock switch


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Passenger front door lock switch


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LH rear door lock switch


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RH rear door lock switch


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LH middle door lock switch (w/ V4U)


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RH middle door lock switch (w/ V4U)


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Driver door switch assembly (DDSA)


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Driver door module (DDM)


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Passenger front door module (PDM)


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LH rear door module (LRDM)


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RH rear door module (RRDM)


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Left middle door module (LMDM) (w/ V4U)


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Right middle door module (RMDM) (w/ V4U)


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Driver door lock actuator


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Passenger front door lock actuator


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LH rear door lock actuator


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RH rear door lock actuator


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LH middle door lock actuator (w/V4U)


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RH middle door lock actuator (w/ V4U)


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Driver door cylinder unlock switch


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Rear integration module (RIM)


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DRVMDL fuse (10-amp)


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PASS MDL fuse (10-amp)


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RRDR MDL fuse (10-amp)


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Class 2 serial data link

Sep 27, 2016 | 2002 Cadillac Deville

1 Answer

What would cause my door locks, AC unit not to work?


Door locks, broken wire in the door jam on the drivers side. A/C could be wires, A/C compressor, high pressure switch , and controller. Brake light could be low fluid or bad sensor.

May 06, 2015 | 2002 Acura RSX

1 Answer

As I stated my 1992 Cadi Deville a/c and heater control is says on the Hi poition and if you hit Low it will not change at all. I have replaced the climet control panel and it remains the same. I checked...


fan for heater /ac is supposed to run any time the ignition is on something about cabin pressure . cadallics better idea but used by most makers now

Feb 23, 2015 | 1992 Cadillac DeVille

1 Answer

How do I fix heater on my Cadi deville


Air Temperature Control Blend Door Failure

In 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.



Oct 30, 2012 | 1999 Cadillac DeVille

1 Answer

I have a 2002 Cadi Seville, with a Northstar 32 Valve V8.


Does this car have 2 fans? YES . The blower motor control processor is probably the problem . Near the blower motor under right front dash .
blower motor control processor-v1kdrewogkaw5ijzsblpkyjs-1-0.png
2003 Cadillac DeVille Blower Motor Control Module

Sep 27, 2017 | 2002 Cadillac Seville

2 Answers

How to change a thermostat on a 2002 cadi deville northstar


Follow the upper radiator hose to the point where it enters the motor. Disconnect it at that housing and remove the bolts holding the housing in pace. Remove the housing and all of the old gasket. The thermostat sits under that housing and just pops right out. Install the new one along with a new gasket. Put everything back in the reverse order.

Oct 16, 2009 | 2002 Cadillac Deville

1 Answer

1990 cadi seville where is the heater core located


Behind the dash (you will have to remove a fair amount of the dash) on the passenger side

Oct 14, 2009 | 1991 Cadillac DeVille

1 Answer

Abs comp prolems


First of all the computer is probably not the problem it is more likely that the one or more of the wheel sensors may be failing. They live in a hostile ennironment (i.e at the wheels) and are far more likely to fail or to be intermittent. The ABS computer module usually either works or fails completely.

Aug 16, 2009 | 1999 Cadillac DeVille

2 Answers

Dash Control Unit Replacement


You can save a LOT of money by fixing it yourself.

All that is wrong with the knob are broken wires from the knob's PC board to the main PC board on the AC control.

All you have to do is remove the AC main control, take it apart, and resolder the broken wires from the PC board with the knob on it, to the main AC pc board. There are 3 wires, any number could be broken.

If you take it apart and solder the broken wires, this WILL fix your issue. Just make sure you put the wires back exactly where they go.

A FIXYA rating (4 blue diamonds) would be most appreciated for my assistance.

Mar 21, 2009 | 2002 Toyota Highlander

1 Answer

1998 Cadi Deville


First off you need to know how these thing's work ,computer controlled .

Trunk Release Function
When the PZM receives a serial data message for the activation of the trunk release solenoid from the instrument cluster or from the RFA, the PZM energizes the trunk release relay under the following conditions:
• The transmission is in PARK
• The valet lockout switch is not activated.

Components
This vehicle has electronic components which the service technician controls in order to provide valuable self-diagnostic information. These components are part of an electrical network that controls various engine subsystems and various body subsystems. A description of each of these subsystems is in the appropriate subsection of this service manual. These major components that compromise the computer system monitor the system sensors and the system switches. These components are the following:
• The powertrain control module (PCM)
• The instrument cluster
• The air controller module (ACM)
• The sensing and diagnostic module (SDM)
• The electronic brake and traction control module (EBTCM)
• The continuously variable road sensing suspension module (CVRSS)
• The body control module (PZM)
• The integrated radio controller (IRC)
• The remote function actuator (RFA)
• The climate control panel (CCP)
• The cellular telephone (PHN)
System Functions
The body control module (PZM) performs the following functions:
• HVAC afterblow control
• Battery guard
• Door lock and unlock
• Fuel level
• Retained accessory power (RAP)
• Theft deterrent
• Exterior lighting control
• Interior lighting control
• Trunk release
• Time of day for the radio display
• Rear defogger
• Fuel door release
• Vehicle personalization
For more information about these functions refer to the appropriate sections.

Your probably have a lose connection somewhere , ground for the BCM or instrument cluster . Behind the dash or instrument cluster ! or other places . G-400 ,G205

The instrument cluster supplies the turn on signal for the alternator

DTC B1910 Generator L-Terminal Open Circuit
DTC B1911 Generator L-Terminal Problem
DTC B1981 Battery Voltage Low
The generator provides the voltage to operate the vehicle's electrical system and to charge the battery through CKT 1 (RED). When the ignition switch is placed in RUN, narrow width pulses on CKT 23 (GRY) are supplied by the powertrain control module (PCM) to the rotor, creating a weak magnetic field. When the engine is started, the regulator senses the generator rotation by detecting AC voltage at the stator through an internal wire. Once the engine is running, the regulator varies the field current by controlling the pulse width. This regulates the generator output voltage for proper battery charging and electrical system operation.
The PCM turns on the VOLT indicator via Class 2 serial data line CKTs 1807 (PPL) whenever undervoltage, overvoltage, or a stopped generator is detected on CKT 225 (RED).

When the ignition switch is placed in the RUN position, voltage is supplied to generator terminal L by the instrument cluster, turning on the regulator. The generator's voltage regulator controls current to the rotor, thereby controlling the output voltage. The rotor current is proportional to the electrical pulse width supplied by the regulator. When the engine is started, the regulator senses generator rotation by detecting AC voltage at the stator through an internal wire. Once the engine is running, the regulator varies the field current by controlling the pulse width. This operation regulates the generator output voltage for proper battery charging and electrical system operation. The generator F terminal is connected internally to the voltage regulator and externally to the PCM. The PCM monitors the field voltage on the generator F terminal.

It's more then likely just a lose connection somewhere . Could take half your vehicle apart to find it .

My first place to look would be here , G400
In the left rear of the passenger compartment, under the rear seat
BCM ground .

Mar 30, 2017 | 1998 Cadillac DeVille

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